ISYS 512Business Application Design and

Development with .Net

David Chao

Business Applications

• 1. Database-centric applications– Transaction Processing Systems, TPS

• Transaction support database• Internal, detailed and historical data

– Decision Support Systems, DSS• Decision support database• Data warehouse

Business Applications

• 2. Client/Server structure:a. Presentation – user interface

• Menus, forms, reports, etc

b. Processing logic • Business rules

c. Database

Client Database Server

SQL queries

Results

Business Applications

• 3. Multiple platforms– Windows-based– Web-based– Mobile-based

Business Applications

• 4. Component and service oriented architecture:– Component-based software development

focuses on building large software systems by integrating previously-existing software components.

– A service-oriented architecture is an information technology approach or strategy in which applications make use of services available in a network such as the World Wide Web.

N-Tier Client/Server Structure• Three-Tier

– Client-based presentation– Processing logic– Database.

• N-Tier:– Using services

• Fat client/Thin client

The Web as a Database Application Platform

• Three-tier architecture– Browser - interface– Server

• web server, database server

– processing logic

• Advantages:– Cross-platform support– Graphical user interface

Business Applications

• 5. Object-oriented, GUI, event-driven

Course Objective

• Develop database-centric, multiple platforms, component and service oriented business applications with .Net.

.Net Architecture

Common Language Runtime

Base Class Library

Data and XML

ASP.Net Windows Forms

Common Language Specification

VB.Net C#/J# C++

• Common Language Runtime:– Manages execution of compiled .NET program.– Provides .Net basic services, such as memory

management, garbage collection, etc.

• Base Class library: define all the basic data types such as system.object, numeric, date, etc.

• Data and XML: Classes work with database (ADO.NET) and XML document.

• ASP.Net and Forms: Classes that generate user interface.

• CLS: CLS dictates the minimum group of features that a .Net language must have.

Execution of a .Net Program

• Language must compliance with Common Language Specification, CLS.

• Compile the language into Microsoft Intermediate Language (MSIL) code.

• The MSIL code is then executed in the Common Language Runtime (CLR), which conceptually is same as the Java Virtual Machine, where it is translated into machine code by a compiler.

• It is a server-side technology.

.Net Advantages• It is independence from a specific language.

– Developers can create a .Net application in any .Net compatible language.

– .Net moves most of the functionality from the language to the .Net Framework. All .Net languages can use these classes.

• It can exist on multiple platforms:– Windows, Web, Mobile devices

• Facilitate application development– Tools, wizards

• Universal data access: Data can be accessed by any Internet-connected device.– ADO.Net

• Implement latest development technologies.– Ex. AJAX, web service

Programming in the .Net Framework

• Programming in the .Net Framework means making use of the classes, objects, and members exposed by the Framework, building your own classes on top of these and manipulating the resulting objects using a .Net language.

Hands On Techniques

• VB.NET, C#– Interface and event-driven programming– Class and component programming

• Database programming– Embedded SQL– ADO.NET programming model– LINQ

• Web Techniques:– Server side scripting: ASP.NET– ASP.Net and ADO.Net– Web services:

Required Software• Visual Studio 2010 Professional

– It has a web server to test web projects.

• Access/MS SQL Server 2008 Express (installed with VS 2010)

• Operating Systems:– Windows XP (x86) with Service Pack 3 - all

editions except Starter Edition– Windows Vista (x86 & x64) with Service Pack

2 - all editions except Starter Edition– Windows 7 (x86 & x64)

Download and Install VS 2010 Professional

• Microsoft DreamSpark website:– https://www.dreamspark.com/

• VS 2010 Service Pack 1– http://www.microsoft.com/download/en/details.aspx?id=23691

To Start/End SQL Server

• SQL Server Express is a “service”

• To start SQL Server service: – Control Panel/Administrative

Tools/Services/SQL Server Express