step-into-windows-10-uwp.pdf

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Step into Windows 10 UWPThis free book is provided by courtesy of C# Corner and Mindcracker Network and

its authors. Feel free to share this book with your friends and co-workers. Please

do not reproduce, republish, edit or copy this book.

Suresh M

Windows Phone Mobile App Developer,

C# Corner MVP

http://windowsapptutorials.wordpress.com

http://www.c-sharpcorner.com/http://windowsapptutorials.wordpress.com/http://windowsapptutorials.wordpress.com/http://windowsapptutorials.wordpress.com/http://www.c-sharpcorner.com/


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SHARE THIS DOCUMENT AS IT IS.PLEASE DO NOT REPRODUCE, REPUBLISH, CHANGE OR COPY.

Table of Content

Part 1: Quick Introduction

Part 2: Requirements for Windows 10 UWP Development

Part 3: Life cycle of windows 10 Part 4: Writing your first Windows 10 UWP APP

Part 5: Show Message Dialog in Windows 10

Part 6: Windows 10 Application Bar

Part 7: Change Apps Title Bar Colour and Enable Back Button in Windows 10 UWP

Part 8: Windows 10 Split View-Hamburger Menu

Part 9: Send E-mail and SMS in windows 10

Part 10: Map control to show your current location and get the street address using GPS Co-

ordinates in Windows 10 UWP

Part 11: 3D Map for Windows 10 UWP Part 12: File Picker in Windows 10 UWP

Part 13: Pick text file in Windows 10 UWP

Part 14: Drag and Drop functionality instead of File Picker in Windows 10 UWP

Part 15: Local Data Base SQLite for Windows 10 UWP

Part 16: Consume web service using HttpClient to POST and GET json data in Windows 10 UWP

Part 17: HTTP Live Streaming in Windows 10

Part 18: Background File Downloader for Windows 10 UWP

Part 19: RSS Reader in Windows 10 UWP App

Part 20: Sensors in Windows 10 UWP App Part 21: Set Specific Device Family XAML Views In Windows 10 UWP

Part 22: Drawing and Inking Using New InkCanvas Control for Windows 10 UWP App

Part 23: Disable screen capture in Windows 10 UWP


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Part 1: Quick Introduction

Microsoft announced Windows 10 would be final windows version. It would evolve and changelike other software products but it will only get updates, because the fact that all windows

platforms (mobile, desktop, Tab and Xbox etc.) has combined to a single Universal Platform

means all have same OS (kernel), now it’s just Windows on phone. So, if you develop app for

windows 10 it would run on all devices running windows 10 like Mobiles, Xbox, etc. Hope you

got the idea of "Universal" word in UWP.

Windows 10 is evolving as a rapid growth technology nowadays. In this book we are going to

learn basic things of Windows 10 application development.

Universal Windows Platform provides the common application platform and lets the developersbuild an app available on all the devices that runs on Windows 10 OS.


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Part 2: Requirements for Windows 10 UWP Development

In this part we are going to see the requirements for developing Windows 10 applications and

SDK used to develop Windows 10 apps.

Hardware Requirements

RAM: More than 4GB

Hard Disk: Minimum 12GB Free space

Virtual machine in Hyper-V

Software Requirements

OS: Windows 10 64-bit (Microsoft Recommended)

Microsoft Visual Studio 2015 pro or community (Community edition is free)

Writing your first Windows 10 application

Windows 10 Emulator


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Part 3: Life cycle of Windows 10

In this part we are going to see the life cycle of Windows UWP 10 app.

In Windows 10 the life cycle of App have three states.

Running

Suspended

Not Running (Terminated)

Running

If the app running you get events, which you can access it in App.cs file.

If you start the application it activates and comes to running state.

If you run another application the other apps goes to background and waits for use to switch

back to that app after certain time interval it moves to suspended state. These state considered

as the app going to terminate (closed) state. Same process goes on until the system encounters

low memory.

Suspended

When the application move to the background or the device enters to the low power state, the

application suspends automatically. While pushing the application to the background, the

system waits for few seconds to make sure that the user switches back to the application

immediately. After a few seconds time interval, the system automatically moves the application

to the suspended state.

Based on the system available memory, the system want to keep a number of suspended appsinto the memory to make sure the user can quickly switch back to the application. The app

always resides in memory as long as your system has available memory to execute. If your

available memory is low, the system automatically removes the unused application from

memory.


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We can resume a suspended application from background and bring it to the foreground thread.

During the state transition, it loads the application data if you already saved during the

suspension state.

Not Running (Terminated) there is no event handler with the app termination. We can check

whether the app got terminated earlier through the activation event.


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Part 4: Writing Your First Windows 10 UWP App

In this part we are going to see how to create a new UWP project.

Let’s start creating a new Windows 10 Blank App template with C# as language and then deployto run the app on Local Machine and Windows Mobile Emulator.

After successful installation (If you face problem in installation contact me) start Visual Studio

2015 and select new project to create new Windows 10 application. Name it “HelloWorldWin10”

or as your wish like shown below.

Click Ok to create new app. Now you can see your app like below.

Open the MainPage.Xaml file in Visual Studio and add TextBlock in the existing grid. Set the Text

property of the TextBlock to Hello World Windows 10 as in the following code.

Welcome to Windows 10

Now time to run the app, by default, you will see that the solution is set to Debug and the

platform is set to x86. The Start Debugging button will also be set to “Local Machine” by default.

x86 will work for both mobile emulator and local machine. If you want to run this on the

Windows Mobile device, you will have to set this as “Mobile Emulator”.


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Click the Start Debugging button with the “Local Machine” option to deploy to run the app on

the local machine.

In design time itself you can see the different device view looks like the following:

Now see the output for different device deployment.

Windows 10 Mobile.

Windows 10 Tab


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Windows 10 Desktop

Note: For Source Code.

https://gallery.technet.microsoft.com/How-to-develop-apps-for-869aaaafhttps://gallery.technet.microsoft.com/How-to-develop-apps-for-869aaaafhttps://gallery.technet.microsoft.com/How-to-develop-apps-for-869aaaafhttps://gallery.technet.microsoft.com/How-to-develop-apps-for-869aaaaf


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Part 5: Show Message Dialog in Windows 10

In this part we are going to see how to show a message dialog in your Windows 10 apps on the

desktop and mobile devices using C# and XAML. The MessageDialog class is available in

Windows 10. We now have a Universal Windows Platform (UWP).

Create new Windows 10 UWP app and name it as you wish. Now go to Mainpage.Xaml and

paste the following XAML code to create a button for showing message dialog.

Now our design page looks like the following screen:

Now go to code behind page and write the following code on button click event.


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private async void Showbutton_Click(object sender, RoutedEventArgs e)

{

MessageDialog showDialog = new MessageDialog("Hi Welcome to Windows 10");

showDialog.Commands.Add(new UICommand("Yes")

{

Id = 0 });

showDialog.Commands.Add(new UICommand("No")

{

Id = 1

});

showDialog.DefaultCommandIndex = 0;

showDialog.CancelCommandIndex = 1;

var result = await showDialog.ShowAsync();

if ((int) result.Id == 0)

{

//do your task

}else

{

//skip your task

}

}

Create an instance of the MessageDialog with the Message and Title if required.

UICommands are added to the commands collection of the dialog. Default Command index is set

to 0 for (Yes) button to invoke user hit the enter key and the Cancel Command index is set to 1

for (No) button to invoke user hit the Escape or No button.

Use ShowAsync() method to show the dialog and check the result containing command id and

perform the yes or no task.

Now run your app with Local Machine, Mobile and Simulator to see the output as in the

following image.

Local Machine


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Mobile


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Simulator

Simulator and Mobile

Part 6: Windows 10 Application Bar

The App bar is designed to expose application commands to the user. There are two types of

app bar you can use.


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TopAppBar

BottomAppBar

You can put any control that you like into the app bar.

Application Bar for Bottom,


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The app bar should be outside the grid control.

You can minimize and maximize the app bar by default using the IsOpen="True" IsSticky="True" .

To minimize the app bar set IsOpen property to false, by default it will be false.

You can create the App Bar using C# code also using the following code:

AppBar myAppBar = new AppBar(); myAppBar.IsOpen = true;

var content = new StackPanel { Orientation = Orientation.Horizontal };

content.Children.Add(new Button { Content = "Button1"});

content.Children.Add(new Button { Content = "Button2" });

myAppBar.Content = content;this.BottomAppBar = myAppBar;

Application Bar is placed in the following screen at only bottom or top and both.

If you are developing app for Windows 10 mobile place the app bar in bottom to find out easily.


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Now run the app and see the output like the following:


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Part 7: Change Apps Title Bar Colour and Enable Back Button In Windows 10 UWP

In this part we are going to see how to change the default application title bar colour in

Windows 10 UWP.

In Windows 10 by default the white title bars is available for all apps, sometimes we need to

change for better UI. Using UI ViewManagement class we can get the application UI properties.

So, I am going to get the title bar properties and change the colour using the following code:

var appView = Windows.UI.ViewManagement.ApplicationView.GetForCurrentView();

appView.TitleBar.BackgroundColor = Colors.LightBlue;

appView.TitleBar.ButtonBackgroundColor = Colors.LightBlue;

appView.TitleBar.ForegroundColor = Colors.White;

appView.TitleBar.ButtonForegroundColor = Colors.White;

Place this code in app launching event in App.xaml.cs file as in the following code. Full code

looks like the following code:

Now run the app and see the title bar it looks like the following image:


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Enable back button in the app title bar Windows 10 UWP

In Windows 10 UWP the back button is disabled by default. If you need back button in the

application title bar you need to enable it. I will show how to enable this button.

Write the following code to enable the back button.

var view = SystemNavigationManager.GetForCurrentView(); view.AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;

Firstly, get the current view and enable the back button.

Now create event handler for handling the back button click.

view.BackRequested += View_BackRequested;

Add the following method to handle the back button click.

private void View_BackRequested(object sender, BackRequestedEventArgs e)

{

//do your task

}

The full source code looks like the following:

var view = SystemNavigationManager.GetForCurrentView(); view.AppViewBackButtonVisibility =

AppViewBackButtonVisibility.Visible; view.BackRequested += View_BackRequested;

private void View_BackRequested(object sender, BackRequestedEventArgs e)


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{

//do your task

}

Now run the app and see the output looks like the following image:


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Part 8: Windows 10 Split View-Hamburger Menu

In this part we are going to see how to create SplitView/Hamburger menu in Windows UWP 10

app.

The new control SplitView added in Windows 10 and is used to display side menu. Many of them

call it hamburger menu. Two things we need to know “Pane” and “Content”.

Pane

These properties contain the menu buttons in your app.

Content

The page content goes in this area.

//Add your menu here

//Add your content here

Using “IsPaneOpen” property you can set true or false, true for open and false to close.

Now create a new Windows 10 project and give proper name. After that open

Your Mainpage.xaml and you can see the empty grid control as in the following screenshot:


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Delete this grid and paste the following code:

In the above code we are creating the button in menu and styling to hamburger menu. We don’t

need to add icons for button just change the font family to “Segoe MDL2 Assets” and set the

content (cheat code) as your wish to see more icons cheat sheet codes.

For example, I set the content as “E700;” and it looks like the following image,


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Now you can create button as your need. Here, I create 4 buttons for sample.

Finally, go to code behind page and I have one button click event to close and open the split

view. In handler we simply want to set pane to close if it is open and vice versa like the following

code:

private void HamburgerButton_Click(object sender, RoutedEventArgs e)

{

MyMenu.IsPaneOpen = !MyMenu.IsPaneOpen;

}

private void button3_Click(object sender, RoutedEventArgs e)

{

Frame.Navigate(typeof (Page1))

}

Now run the app and see the excepted output like the following screen:


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Part 9: Send E-mail and SMS in windows 10

In this part we are going to see how to show email and SMS compose task to send an email and

SMS in Windows 10.

Create new Windows 10 project.

Now create two buttons: one id for sending email and another for sending SMS.

To send E-mail

Firstly, we are going to see how to send email. Write the following code:

private async void ComposeEmail(Contact Torecipient, string messageBody)

{

var to = Torecipient.Emails.FirstOrDefault < Windows.ApplicationModel.Contacts.ContactEmail >

();

var emailRecipient = new Windows.ApplicationModel

.Email.EmailRecipient(to.Address);

EmailMessage objEmail = new EmailMessage();

objEmail.Subject = "Suresh";

objEmail.To.Add(emailRecipient);

await EmailManager.ShowComposeNewEmailAsync(objEmail);

}

You can attach files also while sending email to attach the files write the following code before

composing the email task.

var stream = Windows.Storage.Streams. RandomAccessStreamReference .CreateFromFile(attachment);

var attachment = new Windows.ApplicationModel.Email.EmailAttachment( attachment.Name,

stream);

emailMessage.Attachments.Add(attachment);

To send SMS

To send an SMS write the following code:

private async void ComposeSMS(Contact toContatc, string message)

{

var chatMessage = new Windows.ApplicationModel

.Chat.ChatMessage();

chatMessage.Body = message;


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var phone = toContatc.Phones.FirstOrDefault < Windows.ApplicationModel.Contacts.ContactPhone >

();

chatMessage.Recipients.Add(phone.Number);

await Windows.ApplicationModel.Chat.ChatMessageManager

.ShowComposeSmsMessageAsync(c hatMessage);

}


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Part 10: Map control to show your current location and get the street address

using GPS Co-ordinates in Windows 10 UWP

In this part we are going to see how to use map control and get the current GPS co-ordinates

street address in Windows 10 UWP app.

Create new Windows 10 project and choose the map control from toolbox list.

Geo Location API allows easy to access the current location of device. Here we will see how to

get the longitude and latitude co-ordinates of the device.

Firstly, enable the location capabilities to allow the device to access the location like the

following screen:

Next add the following namespace in you code page:

using Windows.Devices.Geolocation; using Windows.Services.Maps;


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Create new instance for Geolocator using that we can retrieve the position of our device. Then

add the location coordinate points to our map control.

Write the following code to set your position to the map control.

var geolocator = new Geolocator();

var position = await geolocator.GetGeopositionAsync();

mymap.Center = position.Coordinate.Point;

mymap.ZoomLevel = 15;

Set the map zoom level according to your needs and you will get the co-ordinates of the current

position.

Next we are going to get the current street address of the position using the coordinates.

You will get the following details also:

BuildingFloor

BuildingName

BuildingRoom

BuildingWing

Continent

Country

CountryCode

District

FormattedAddress

Neighborhood

PostCode

Region

RegionCode

Street

StreetNumber Town

Write the following code to get the address of the street.


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var mapLocation = await

MapLocationFinder.FindLocationsAtAsync(position.Coordinate.Point); if

(mapLocation.Status == MapLocationFinderStatus.Success)

{

string address = mapLocation.Locations[0].Address.StreetNumber + " " +

mapLocation.Locations[0].Address.Street;

}

else

{

dialog.Content = "Not Found";

}

Now run the app and see the output like the following screen:


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Part 11: 3D Map for Windows 10 UWP

In this part we are going to see how to show 3-D map in Windows 10 UWP App.

In normal map we only have an option to show the map in Satellite or Ariel view but in Windows

10 we have option to show 3D map. It’s very easy to implement 3D map in Universal App.

Now we are going to see how to create a map control to display the map normally and then set

the map control to show the map in 3D. Map control with 3D helps the user to view the location

at any angle.

Let’s create new Windows 10 Universal Windows app.

Firstly, enable the app capabilities “Location” to allow your app to access the location. Open

“Package.appxmanifest” file and enable location like below.

Next go to your MainPage.XAML and add the following xmlns:

xmlns:maps="using:Windows.UI.Xaml.Controls.Maps"

Add the MapControl using the following xaml code:


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Now go to code behind page and follow the below steps.

Firstly, check the map supports 3D.

Set the map style Aerial3DwithRoads or Aerial3D as your wish. Then set the position latitude andlongitude finally call the TrySetSceneAsync method by passing map scene.

The full code looks like below.

private async void my3dMap_Loaded(object sender, RoutedEventArgs e)

{

if (my3dMap.Is3DSupported)

{

my3dMap.Style =

MapStyle.Aerial3DWithRoads;

BasicGeoposition geoposition = new

BasicGeoposition(); geoposition.Latitude =8.4875;

geoposition.Longitude = 76.9525;

Geopoint location = new Geopoint(geoposition);

MapScene mapScene = MapScene.CreateFromLocationAndRadius(location,500, 150, 70); await my3dMap.TrySetSceneAsync(mapScene);

}

}


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Now run the app and you can see the following output:

Note: It is showing warning message MapServiceToken not specified for that we need to get the

token from Bing map development Center.


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Part 12: File Picker in Windows 10 UWP

In this part we are going to see the FileOpenPicker in Windows 10 application.

In Windows 10 we have OpenFileDialog which opens a dialog to pick the files. Here we are going

to pick the image file in Windows 10.

Create new Windows 10 project and create a button and image control to perform FilePicker

operation.

Firstly, create a new instance for FileOpenPicker as in the following snippet:

FileOpenPicker openPicker = new FileOpenPicker();

Next, we have to set file picker ViewMode, you could ignore this, but if you would like to add,

there are two options such as List and Thumbnail. Here, I am going to set thumbnail.

openPicker.ViewMode = PickerViewMode.Thumbnail;

Then set the suggested location as your wish I am going to set default location as picture library.

openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;

We need to add FileTypeFilter , mandatory fields you should add. It requires at least one type.

The FileTypeFilter is a readonly collection. We would be able to add values. Here I am setting

filter type for png and jpg images.

openPicker.FileTypeFilter.Add( ".jpg");

openPicker.FileTypeFilter.Add( ".png");

Finally, we are going to show the file picker dialog as in the following code and we have the

option to select single or multiple file selection.

For single file selection:

StorageFile file = await openPicker.PickSingleFileAsync();

For multiple file selection:


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StorageFile file = await openPicker.PickMultipleFilesAsync();

Finally, we are going to set the selected image stream to empty image control.

if (file!=null)

{

var stream = await file.OpenAsync(Windows.Storage. FileAccessMode.Read); var image = new BitmapImage();

image.SetSource(stream);imageView.Source =

image;

}

else

{

// }

The whole code looks like the following code:

private async void openBtn_Click(object sender, RoutedEventArgs e)

{

FileOpenPicker openPicker = new FileOpenPicker(); openPicker.ViewMode =

PickerViewMode.Thumbnail; openPicker.SuggestedStartLocation =

PickerLocationId.PicturesLibrary; openPicker.FileTypeFilter.Add(".jpg");

openPicker.FileTypeFilter.Add(".png");


if (file!=null)

{

var stream = await file.OpenAsync(Windows.Storage. FileAccessMode.Read); var

image = new BitmapImage();

image.SetSource(stream);

imageView.Source = image; }

else

{

//

}


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}

For multiple file selection,

foreach(var files in filelist)

{

var stream = await file.OpenAsync(Windows.Storage. FileAccessMode.Read); var image = newBitmapImage();

image.SetSource(stream);

yourimagelist.Add(image);

}

Finally, run your app and you can see the following output:


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Part 13: Pick text file in windows 10

In this part we are going to see how to open text file using FileOpenPicker in Windows 10

application.

In Windows 10 we have OpenFileDialog which opens a dialog to pick the files. Here we are going

to pick the text file in Windows 10.

Create new Windows 10 project and create a button and image control to perform File Picker

operation.

Firstly, create a new instance for FileOpenPicker as in the following code snippet:

FileOpenPicker openPicker = new FileOpenPicker();

Next, we have to set file picker ViewMode, you could ignore this, but if you would like to add,

there are two options, such as List and Thumbnail. Here I will set thumbnail.

openPicker.ViewMode = PickerViewMode.Thumbnail;

Then set the suggested location as you wish. I am going to set default location as document

library.

openPicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;

We need to add FileTypeFilter; it is a mandatory field that you should add. It requires at leastone type.

The FileTypeFilter is a readonly collection. We would be able to add values.

Here I am setting filter type for .txt files.

openPicker.FileTypeFilter.Add(".txt");

Finally, we are going to show the file picker dialog as in the following code snippet and we have

the option to select single or multiple file selection.


Finally, we are going to read the selected file using stream and assign it to textblock.


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private async void buttonPick_Click(object sender, RoutedEventArgs e)

{

FileOpenPicker openPicker = new FileOpenPicker(); openPicker.ViewMode =

PickerViewMode.Thumbnail; openPicker.SuggestedStartLocation =

PickerLocationId.DocumentsLibrary; openPicker.FileTypeFilter.Add(".txt");StorageFile file = await openPicker.PickSingleFileAsync();

if (file != null)

{

var stream = await file.OpenAsync(Windows.Storage. FileAccessMode.Read); using

(StreamReader reader = new StreamReader(stream.AsStream()))

{

textBlockShow.Text = reader.ReadToEnd();

}

}

else

{

}

}

Now run debug and run the app and you can see the following output:


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Part 14: Drag and Drop functionality instead of File Picker in Windows 10

In this part we are going to see drag-and-drop functionality in Windows 10 UWP app.

In Windows 10 platform, a new drag-and-drop functionality was introduced to WindowsUniversal apps for scenarios such as dragging image or document from your local machine

straight into your app. It allows us developers to support more intuitive experiences. Drag and

drop is a good way to transfer data within an application or between applications using a

standard gesture.

Let’s see how simple it is to drag and drop image from your local system desktop into your

Windows 10 Universal apps.

Steps:

Create new Windows 10 blank project and give suitable name.

Open your MainPage.XAML page and go to xaml code area in that create one StackPanel and

allow drop property to true. Attach an event handler to Drop and DropOver event, which will be


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used to handle an event of dropping image or document on the stackpanel. DropOver will be

used to allow image copying while it's dragged over the stackpanel.

Add an Image object inside to show the image which was dropped.

Full source code looks like the following,

Now go to code behind page and write the following code in drop and dragover event handler.

private async void StackPanel_Drop(object sender, DragEventArgs e)

{

if (e.DataView.Contains(StandardDataFormats.StorageItems))

{

var items = awaite.DataView.GetStorageItemsAsync();if (items.Any())

{var storeFile= items[0] as StorageFile; varbitmapImage = new

BitmapImage();

bitmapImage.SetSource( await

storeFile.OpenAsync(FileAccessMode.Read));dragedImage.Source = bitmapImage;

}

}

}

private void StackPanel_DragOver(object sender, DragEventArgs e)

{

e.AcceptedOperation = DataPackageOperation.Copy;

}


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When image is being dragged over the stackpanel the DragOver event handler will be fired in

that event. I am going to allow copying the dragged image.

When the photo gets dropped the drop event will be fired and here I will take it rom the

StorageItems collection and set the source for draggedImage image.

You can set the caption also for better user experience for that change the dragover event code

like the following:

private void StackPanel_DragOver(object sender, DragEventArgs e)

{

e.AcceptedOperation = DataPackageOperation.Copy;

e.DragUIOverride.Caption = "You are dragging a image";

e.DragUIOverride.IsCaptionVisible = true;e.DragUIOverride.IsContentVisible = true;

}

Now run the app and you can see the following output:

While drag the image in to stackpanel.


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After dropped into the stackpanel

Part 15: Local Data Base SQLite for Windows 10 UWP

In this part we are going to learn how to create local DB for Windows 10 app and perform the

CRUD (Create Read Update and Delete) operation in Windows 10 database.

See the step by step implementation.

Introduction

SQLite is a lightweight database used for mobile local storages.

Create new UWP project.

Setup SQLite environment.


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Install SQLite-UAP extensions form NuGet Package Manager as in the following screenshot:

Next, install SQLite.Net-PCL extension from NuGet Package:

Now, we are going to the following areas:

How to perform SQLite CRUD operations.

How to bind SQLite data to a ListBox

Design the UI as in the following:


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XAML Code

Now write the following code in your corresponding button click events.

I am going to create one Student DB with Students Table with id, Name, Address and Mobile so

first design the table as in the following:


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public class Students

{

[SQLite.Net.Attributes.PrimaryKey,SQLite.Net.Attributes.AutoIncrement] public int Id { get; set; }

public string Name { get; set; } public string Address { get; set;

} public string Mobile { get; set;

} public Students()

{

}

public Students(string name, string address, string mobile)

{

Name =

name;

Address =

address;

Mobile =

mobile;

}

}

Create DB

public static void CreateDatabase()

{

var sqlpath =

System.IO.Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Pat

h, "Studentdb.sqlite");

using (SQLite.Net.SQLiteConnection conn = new SQLite.Net.SQLiteConnection(newSQLite.Net.Platform.WinRT. SQLitePlatformWinRT(), sqlpath))

{

conn.CreateTable();

}

}

Insert New Student details

public void Insert(Students objContact)

{


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var sqlpath =

System.IO.Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path,

"Studentdb.sqlite");


{

conn.RunInTransaction(() =>

{

conn.Insert(objContact);

});

}

}

Retrieve the specific contact from the database.

// Retrieve the specific contact from the database. public

Students ReadContact(int contactid)

{

var sqlpath =




{

var existingconact = conn.Query("select * from Students whereId =" + contactid).FirstOrDefault();

return existingconact;

}

}

Read all student details

//Read All Student details public ObservableCollection ReadAllStudents()

{

var sqlpath =




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{

List myCollection = conn.Table().ToList(); ObservableCollection StudentsList = new

ObservableCollection(myCollection);

return StudentsList;

}

}

Update student details

//Update student detaisl

public void UpdateDetails(string name)

{

var sqlpath =



using (SQLite.Net.SQLiteConnection conn = new SQLite.Net.SQLiteConnection(new

SQLite.Net.Platform.WinRT. SQLitePlatformWinRT(), sqlpath))

{

var existingconact = conn.Query("select * from Students where

Name =" + name).FirstOrDefault();if (existingconact != null)

{

existingconact.Name = name;

existingconact.Address =

"NewAddress";

existingconact.Mobile =

"962623233";


{

conn.Update(existingconact);

});}

}

}


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Delete all student or delete student table

//Delete all student or delete student table public

void DeleteAllContact(){

var sqlpath =



using (SQLite.Net.SQLiteConnection conn = new SQLite.Net.SQLiteConnection(new

SQLite.Net.Platform.WinRT. SQLitePlatformWinRT(), sqlpath))

{

conn.DropTable

();

conn.CreateTable(); conn.Dispose();

conn.Close();

}

}

Delete specific student

//Delete specific student

public void DeleteContact(int Id)

{

var sqlpath =




{

var existingconact = conn.Query("select * from Studentdb where

Id =" + Id).FirstOrDefault();if (existingconact != null)

{


{

conn.Delete(existingconact);


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});

}

}

}

Now run the app with different devices and you will get the output as in the following:

Here I have tested with Windows 10 Simulator.

For source code.

https://code.msdn.microsoft.com/Local-Data-Base-SQLite-for-5e6146aahttps://code.msdn.microsoft.com/Local-Data-Base-SQLite-for-5e6146aahttps://code.msdn.microsoft.com/Local-Data-Base-SQLite-for-5e6146aahttps://code.msdn.microsoft.com/Local-Data-Base-SQLite-for-5e6146aa


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Part 16: Consume web service using HttpClient to POST and GET json data in

Windows 10 UWP

In this part we will see how to consume a REST service in Windows 10. Before that we will

introduce REST services.

REST is a resource that implements a uniform interface using standard HTTP GET, POST, PUT

methods that can be located by URI.

Windows 10 UWP supports basic get and post web requests using the following two APIs:

System.Net.Http.HttpClient

Windows.Web.Http.HttpClient.

The System.Net.Http.HttpClient was introduced in .NET 4.5. In Windows 10 this API has changed

to top layer of Windows.Web.Http.HttpClient . The supported OS and programming languages

are as follows:

API OS Versions Supported

Languages

System.Net.Http.HttpClient Windows Phone 8

onwards

.NET

languages

Windows.Web.Http.HttpClient Windows, WindowsPhone 8.1 onwardsAll

Both of this APIs are available in UWP. Select which one you need.

If you are going to develop native UI or pass specific SSL certificates for Authentication then use

Windows.Web.Http.HttpClient API.

If you are going to develop app with cross platform, such as iOS, Android, then use

System.Net.Http.HttpClient. This API supports Xamarin IOS and Android development.

Now see how to consume REST service in Windows 10 app using System.Net.Http.HttpClient.

Create new windows 10 project

For POST JSON data write the following code.


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URI is the url you are going to POST JSON data.

Here, I will create runtime JSON data using dynamic and ExpandoObject , using this you can

create JSON string at runtime instead of creating classes.

Json.Net is used to serialize the runtime dynamic object values to JSON data.

Create new instance for HttpClient and HttpResponseMessage.

public async void POSTreq()

{

Uri requestUri = new Uri("https://www.userauth");//replaceyour Url dynamic dynamicJson = new ExpandoObject();

dynamicJson.username ="[email protected]".ToString();

dynamicJson.password = "9442921025";string json = "";

json = Newtonsoft.Json.JsonConvert.SerializeObject(dynamicJson);

var objClint = new System.Net.Http.HttpClient();

System.Net.Http.HttpResponseMessage respon = await objClint.PostAsync(requestUri,new StringContent(json,System.Text.Encoding.UTF8,"application/json"));

string responJsonText = await respon.Content.ReadAsStringAsync();

}

For GET json response write the following code:

public async void GetRequest()

{

Uri geturi = new Uri("http://api.openweathermap.org/data/2.5/weather?q=London"); //replace your url

System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();

System.Net.Http.HttpResponseMessage responseGet = await

client.GetAsync(geturi); string response = await

responseGet.Content.ReadAsStringAsync();

}

Now run the app and see the excepted output:


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Part 17: HTTP Live Streaming in Windows 10

Microsoft finally released live streaming API support in Windows 10 UWP. Before that we need

third party API Windows Phone Streaming Media Assistance. But it will arrive in UWP.

Windows.Media.Streaming.Adaptive namespace: It helps to play over live http media

streaming.

This namespace definition support many kinds of different adaptive streaming protocols, such as

Http Live Streaming or HLS is a protocol for streaming media content that is segmented into

several small files, each of them in different sizes and qualities to enable the content

disseminating an adaptive rate depending on the quality of the connection.

This returns AdaptiveMediaSourceCreationResult which includes the source and whether the

manifest was able to be downloaded or what error occurred. Remember that you enabled theInternetClient capability in your appxmanifest file.

Now see the steps how it works.

Create new Windows 10 project and go to MainPage.xaml page design view to design.

Add Media control to play the streamed videos and use the following code to design media

control:

Next add two app bar controls to Play and Pause the streaming.


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Next go to code behind page and write the following code to stream the video:

var streamUri = new Uri(""); //replace your URL

var streamResponse = await AdaptiveMediaSource.CreateFromUriAsync(streamUri); if

(streamResponse.Status == AdaptiveMediaSourceCreationStatus .Success)

liveMedia.SetMediaStreamSource(streamResponse.MediaSource);

else

{

//not found

}

Before set the media source check the status property to verify that everything went correct

otherwise skip it.

By default it will start play the stream if you want to pause writes the following code:

private void pausBtn_Click(object sender, RoutedEventArgs e)

{

liveMedia.Pause();

}

If you want to play again write the following code:

private void playBtn_Click(object sender, RoutedEventArgs e)

{

liveMedia.Play();

}

You can play around the media control like the following function pause, play, mute, unmute

and volume increase, etc.

Now run the app and check the output look like the below video. Here I am going to stream thelive news channel.


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Part 18: Background File Downloader for Windows 10 UWP

In this part we are going to see how background files downloading work in Windows 10 UWP

app.

A background transfer is used for long-term transfer or downloads operations such as video,

music, and images. For that time user will allow play around your app don’t stop the user to

wait.

BackgroundDownloader class will help you to transfer or download the files from the server

event the app is running in foreground. If the user exits the app, the download will continue in

the background. You can check when the app is relaunched.

Let’s see the steps how to download files from server.

Create new Windows 10 project and give a suitable name.

Design your xaml page. Here I will create one textbox to enter your download url then textblock

for showing the status and one button to start the download XAML Code


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Next we need to ensure that your app has the capability to access the internet. To enable the

capability follow the below steps.

Double click your package.aapmainfest file in you solution explorer and enable the internet

client like the following screenshot:

Next go to code behind page and write the following code:

DownloadOperation downloadOperation;

CancellationTokenSourcecancellationToken;

Windows.Networking.BackgroundTransfer.BackgroundDownloader backgroundDownloader =new Windows.Networking.BackgroundTransfer.BackgroundDownloader();

public MainPage()

{

this.InitializeComponent();

}

public async void Download()

FolderPicker folderPicker = new FolderPicker();

folderPicker.SuggestedStartLocation = PickerLocationId.Downloads;

folderPicker.ViewMode = PickerViewMode.Thumbnail;

folderPicker.FileTypeFilter.Add("*");

StorageFolder folder = await folderPicker.PickSingleFolderAsync();


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if (folder != null)

{

StorageFile file = await folder.CreateFileAsync("NewFile.jpg",

CreationCollisionOption.GenerateUniqueName);Uri durl = new Uri(linkBox.Text.ToString());

downloadOperation = backgroundDownloader.CreateDownload(durl, file);

Progress progress = new

Progress(progressChanged);

cancellationToken = new CancellationTokenSource();

try

{

Statustext.Text = "Initializing...";

await downloadOperation.StartAsync().AsTask(cancellationToken.Token, progress);

}

catch (TaskCanceledException)

{

downloadOperation.ResultFile.DeleteAsync(); downloadOperation = null;

}

}

private void progressChanged(DownloadOperation downloadOperation)

{

int progress = (int)(100 * ((double)downloadOperation.Progress.BytesReceived / (double)downloadOperation.Progress.TotalBytesToReceive));

Statustext.Text = String.Format("{0} of {1} kb. downloaded - %{2} complete.",

downloadOperation.Progress.BytesReceived / 1024,downloadOperation.Progress.TotalBytesToReceive / 1024, progress);

switch (downloadOperation.Progress.Status)

{

case BackgroundTransferStatus.Running:

{

break;

}

case BackgroundTransferStatus.PausedByApplication:

{

break;


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}

case BackgroundTransferStatus.PausedCostedNetwork:

{

break;

}case BackgroundTransferStatus.PausedNoNetwork:

{

break;

}

case BackgroundTransferStatus.Error:

{

Statustext.Text = "An error occuredwhile downloading."; break;

}

}

if (progress >= 100)

{

downloadOperation = null;

}

}

private void downloadBtn_Click(object sender, RoutedEventArgs e)

{

Download();

}

}

Created a new DownloadOperation and CancellationTokenSource object using the

BackgroundDownloader class when passed the required StorageFile location and download URI

values and call the CreateDownload method to download the file.

In the above code user first select the location to store the file and start the download and

register a method to receive progress updates.

Progress class helps you to track the downloading progress and you can get how much bytes

received.

Now run the app and see the output like the following screen. Here I am going to download the

Google logo.


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Part 19: RSS Reader in Windows 10 UWP App

In this part we are going to see the how to perform RSS Reader in Windows 10 application.

Create new Windows 10 project and give suitable name.

In windows 10 default SyndicationClient helps you to feed RSS service.

Design view will be designed as like the following XAML code:


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Now go to code behind and create new instance of SyndicationClient and SyndicationFeed .

SyndicationClient client = new SyndicationClient();

SyndicationFeed feed = await client.RetrieveFeedAsync(uri);

Using RetrievedFeedAsync pass the url which you want to feed.

Using foreach you can manipulate the feed items:

oreach (SyndicationItem item in feed.Items)

{

list.Items.Add(item);}

Here I create one helper class to perform RSS feed.

The full source code should be like this

private async void load(ItemsControl list, Uri uri)

{

SyndicationClient client = new SyndicationClient(); SyndicationFeed feed = await

client.RetrieveFeedAsync(uri); if (feed != null)

{foreach (SyndicationItem item in feed.Items)

{

list.Items.Add(item);

}

}

}

public void Go(ref ItemsControl list, string value)

{

try

{

load(list, new Uri(value));

}

catch


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{

}

list.Focus(FocusState.Keyboard);

}

private void feedClick_Click(object sender, RoutedEventArgs e)

{

helperRSS.Go(ref Display, Value.Text);

}

Now run the application and enter your RSS feed Url in the given textbox. Here I am going to

feed my C# Corner articles.

Output


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Part 20: Sensors in Windows 10 UWP App

Windows 10 SDK comes with lots of new sensors which helps the users to keep health fit to

know what the user needs. The new list of sensors can be seen below:

Altimeter

Activity Sensor

Barometer

Pedometer

Proximity Sensor

Let’s see the sensor in detail.

To access the sensors API add the following namespace first,

using Windows.Devices.Sensors;

Altimeter

Altimeter helps to measure the relative altitude i.e. changes in elevation. The Altimeter has an

event called ReadingChanged and triggered whenever a new value is sensed by the Altimeter

sensor. ReportInterval property is used to set the time interval at which the sensor has to

report.Sample code

public void GetAltimeter()

{

Altimeter getAltiude = Altimeter.GetDefault();

AltimeterReading reading =

getAltiude.GetCurrentReading();

getAltiude.ReportInterval = 100;

getAltiude.ReadingChanged += GetAltiude_ReadingChanged;

}

private void GetAltiude_ReadingChanged(Altimeter sender, AltimeterReadingChangedEventArgs args)

{

AltimeterReading readingvalues = args.Reading;

}


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Activity Sensor

ActivitySensor will help to detect the user’s activity based on the user motion context. These

sensors help to detect the motion of user either walking, running and idle etc. This sensor set to

idle state when the device is without any movement and also you can get the details up to 30

days.

Sample code to get the activity reading:

public async void GetActivity()

{

ActivitySensor activity =await ActivitySensor.GetDefaultAsync();

var reading = await activity.GetCurrentReadingAsync();

activity.ReadingChanged += new

TypedEventHandler(ReadingCh anged);

}

private void ReadingChanged(ActivitySensor sender, ActivitySensorReadingChangedEventArgsargs)

{

ActivitySensorReading readingActivity = args.Reading;

}

To get the last 30 days details:

DateTimeOffset last30days = DateTime.Today.AddDays(-30);

var details = await ActivitySensor.GetSystemHistoryAsync(last30days); foreach (var values in details)

{

string newvalue = values.Activity.ToString();

}

var trigger = new

Windows.ApplicationModel.Background.ActivitySensorTrigger(100);

trigger.SubscribedActivities.Add(ActivityType.InVehicle);

Barometer

The Barometer is help’s to measure the atmospheric pressure. The Barometer API has an Event

handler ReadingChanged which gets a new value is sensed by the sensor. The ReportInterval


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property is used to set the interval at which the sensor has to report. GetCurrentReading

method is used to gets the current reading for the barometer.

Sample Code

public async void getBarometer()

{

Barometer barometerValues = Barometer.GetDefault();

BarometerReading reading =

barometerValues.GetCurrentReading(); var getPressure =

reading.StationPressureInHectopascals;

barometerValues.ReportInterval = 150;

barometerValues.ReadingChanged +=

Barometer_ReadingChanged;

}

private void Barometer_ReadingChanged(Barometer sender, BarometerReadingChangedEventArgsargs)

{

string values = args.Reading.ToString();

}

Pedometer

Pedometer help’s you to count the user’s steps in walking and running and you can access

history details for up to 30 days.

Pedometer sensor comes with Windows Phone 10 and also in Microsoft Band.

Sample Code

public async void pedometer()

{

Pedometer readings = await Pedometer.GetDefaultAsync(); readings.ReportInterval = 100;

readings.ReadingChanged += Readings_ReadingChanged;

}

private void Readings_ReadingChanged(Pedometer sender, PedometerReadingChangedEventArgs args)

{

PedometerReading readvalues = args.Reading;

if (readvalues.StepKind == PedometerStepKind.Walking)


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{

var walkingsteps = readvalues.CumulativeSteps;

}

else if (readvalues.StepKind == PedometerStepKind.Running)

{var runningSteps = readvalues.CumulativeSteps;

}

public async void gettingHistory()

{

var history = await Pedometer.GetSystemHistoryAsync(DateTime.Now.AddDays(-30));

}

To get the last 30 days or any days you can get it from GetSystemHistoryAsync method by

passing the date this sensor mainly used to detect weather the user has intentionally touched

the display or not.

Proximity Sensor

Proximity sensor help to detect the presence of the object it supports short and long range.

You can notify this we use turn off the display during phone call.

Sample Code

ProximitySensor sensor;public void GetProximityStatus()

{

DeviceWatcher watch;

watch = DeviceInformation.CreateWatcher(ProximitySensor.GetDeviceSelector());watch.Added += Watch_Added;

watch.Start();

ProximitySensorReadingreading = sensor.GetCurrentReading(); sensor.ReadingChanged += Sensor_ReadingChanged;

}

private void Sensor_ReadingChanged(ProximitySensor sender, ProximitySensorReadingChangedEventArgsargs)

{

ProximitySensorReading readStatus = args.Reading;

}


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private void Watch_Added(DeviceWatcher sender, DeviceInformation args)

{

ProximitySensor identified =

ProximitySensor.FromId(args.Id); sensor = identified;}

Part 21: Set Specific DeviceFamily XAML Views In Windows 10 UWP

In this part we are going to see how to set different XAML page for specific device family.

The new Universal Windows Platform introduced a new feature DeviceFamily specific views(UI)

which allows developers to define specific XAML page for specific device families (Desktop,

Mobile.etc).

If we want to have different view for different device families. There are three ways to set

specific device family XAML view.

Let's see the steps

Firstly, Using DeviceFamily-Type folder,

Create new Windows 10 blank project and give a suitable name.

This method is the most common way to perform this task. Create a new folder in your project,

called “DeviceFamily-Type”. The type is the name of the device family type

(Mobile, Team, Desktop, IoT).

So in our sample I have created mobile specific view and it looks like the following screen:

In our sample we will create a new folder called DeviceFamily-Mobile for specific view on mobile

device.

Let us take the MainPage.XAML in the project, with blue background we want this specific XAML

view for a mobile device family.


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The next step would be adding a XAML view called the same as the page so in this case,

MainPage.xamlwill be added into the folder DeviceFamily-Mobile and looks like the following:

This MainPage.XAML won't have any code-behind, it will use the code-behind of the main

MainPage.xaml.cs file.

Now run the app on a mobile device it will load the XAML from DeviceFamily-

Mobile/MainPage.xaml. For any other device family type, it will load the MainPage.xaml fromthe main folder.

Change the grid background colour to green like below code

Second one is DeviceFamily-Type in file name,

The second method to perform the same thing is to create a new XAML View with, again, the

same name, but with DeviceFamily-Type extension in our MainPage, it would mean adding a

new XAML view file called MainPage.DeviceFamily-Mobile.xaml to the main folder and looks like

below screen.


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Depending on the device family, one of the two XAML files will get loaded.

Now run the app in desktop and mobile and see the output looks like the following screen:

Mobile view

Desktop view

Part 22: Drawing and Inking Using New InkCanvas Control for Windows 10 UWP

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In this part we will see how to capture user input and save it as image.

Windows 10 introduced built-in InkCanvas control to capture the user input. I am going to show

the use of InkCanvas control to capture the user touch input and save it as image.

In Windows 8.1 apps you had to create a Canvas, listen to input events, and render your own

strokes, but in Windows 10 use the built-in InkCanvas control to immediately capture use input.

This control allows user to quickly enable inking for user and easily expand its functionality by

accessing the InkCanvas’s InkPresenter property. InkPresenter can be used to configure a

collection of user input through touch or mouse input.

Let’s see the steps to perform this operation.

Create a new windows 10 UWP app. Once successful created, go to MainPage.XAML page and

write the following code to design your page.

The control looks like the following image:

Next got to code behind page and write the following code.

Firstly, create new instance for InkPresenter.

InkPresenter myPresenter = myCanvas.InkPresenter;


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Next define the input device type for Canvas control to let the control accepts inputs from those

devices.

Pen, Mouse and Touch.

myPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.Pen

|Windows.UI.Core.CoreInputDeviceTypes.Mouse|Windows.UI.Core.CoreInputDeviceTypes. Touch;

Set the pen colour, pencil tip shape and size.

myAttributes.Color = Windows.UI.Colors.Crimson;myAttributes.PenTip = PenTipShape.Circle;

myAttributes.Size = new Size(2, 5);

The whole code on canvas pointer pressed event looks like the following:

private void myCanvas_PointerPressed(object sender, PointerRoutedEventArgs e)

{

InkPresenter inkPresenter = myCanvas.InkPresenter; inkPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.Pen

|Windows.UI.Core.CoreInputDeviceTypes.Mouse|Windows.UI.Core.CoreInputDeviceTypes.Touch;

InkDrawingAttributes myAttributes = inkPresenter.CopyDefaultDrawingAttributes(); myAttributes.Color = Windows.UI.Colors.Crimson;

myAttributes.PenTip = PenTipShape.Circle;myAttributes.PenTipTransform =

System.Numerics.Matrix3x2.CreateRotation((float)Math.PI /

4); myAttributes.Size = new Size(2, 5);

inkPresenter.UpdateDefaultDrawingAttributes(myAttributes

);

}

Next save this ink into image,

private async void savebtn_Click(object sender, RoutedEventArgs e)

{

var savePicker = new FileSavePicker();


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savePicker.SuggestedStartLocation =

Windows.Storage.Pickers.PickerLocationId.PicturesLibrary;

savePicker.FileTypeChoices.Add( "PNG", new

System.Collections.Generic. List { ".png" });

StorageFile file = await savePicker.PickSaveFileAsync(); if (null != file)

{

try

{

using (IRandomAccessStream stream = await

file.OpenAsync(FileAccessMode.ReadWrite))

{

await myCanvas.InkPresenter.StrokeContainer.SaveAsync(stream);

}

}

catch (Exception ex)

{

}

}

}

Now change the InkPresenter processing mode to erase to delete the ink:

myCanvas.InkPresenter.InputProcessingConfiguration.Mode =InkInputProcessingMode.Erasing;

Erase button click event looks like below:

private void erasebtn_Click(object sender, RoutedEventArgs e)

{

myCanvas.InkPresenter.InputProcessingConfiguration.Mode =InkInputProcessingMode.Erasing;

}


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Part 23: Disable screen capture in Windows 10 UWP

In this part we are going to see how to disable screen capture in Windows 10 app.

If you are develop any security apps, sometimes we will need to disable to take screenshots ofyour app. This feature was available in Windows 10 app.

You need to call the View Management class get the current view screen.

Finally set the screen capture Boolean value to false like the following code.

Windows.UI.ViewManagement.ApplicationView.GetForCurrentView().IsScreenCaptureEna bled =

false;

For more sample and articles follow:

https://windowsapptutorials.wordpress.com/ http://www.c-sharpcorner.com/members/suresh-m27
https://windowsapptutorials.wordpress.com/https://windowsapptutorials.wordpress.com/https://windowsapptutorials.wordpress.com/