NET for Progress Programmers

.NET for Progress Programmers

Data Orientation vs Object OrientationEvent Handling in .NET

Will van BeekIndependent Consultant

www.proWill.nl1 april 2012

[email protected]@proWill.nl

proWillvanBeek

http://nl.linkedin.com/in/proWill

+316 2206 8535

© 2005 Progress Software Corporation2 © - 2012 - proWill


Data Oriented (DOP) Object Oriented (OOP) Event Handling in .NET




Data Oriented (DOP) Object Oriented (OOP)• Datastructures – Progress 4GL .NET

• Differences – DOP OOP

• Datastructures – Examples • Record Buffer Customer class

• Building a Temp-Table/DataTable

• Building an Iterator

Event Handling in .NET




Data Orientation and Object Orientation – DataStructures.

Progress 4GL/ABL .NET• Primitive Datatypes• DataSet• Temp-Table• Extent

• Primitive Datatypes• DataSet• DataTable• Array• , Map, Hash, List,

Tree, Dictionary, Bag, Set, Stack, Queue Naming only a few !

Collection1. – CustNum2. – Name3. – Address4. – Address25. – City6. – State7. – Country8. – Phone9. – Contact10. – SalesRep11. – Comments12. – CreditLimit13. – Balance14. – Terms15. – Discount16. – PostalCode17. – Fax18. – Email





• Datastructures – Examples• Record Buffer Customer class







DOP OOP – the Difference is in the Language.

Progress 4GL/ABL• Data is in the Record Buffer

.NET• Data is in Objects

• FIND, FOR EACH, QUERY separated from the data

• Data and Operations (methods) are encapsulated





















The Record Buffer through .NET eyes

DataStructure examples – the customer class



The Record Buffer through .NET eyes

DataStructure examples – the customer class












dataField.cls

+ name+ stringValue

dataField.cls

+ name+ stringValue

dataField.cls

+ name+ stringValue

dataRecord.cls

+ dataFieldsdataRecord.cls

+ dataFieldsdataRecord.cls

+ dataFields

dataField.cls

+ name+ stringValue

dataFieldCollection.cls

+ count+ item as dataField (extent)

+ add(name,stringValue)

dataRecordCollection.cls

+ count+ item as dataRecord (extent)

+ add(name,stringValue)

dataRecord.cls

+ dataFields

dataTable.cls

+ entity

+ dataRecords

The Temp-Table through .NET eyes

DataStructure examples – Building a dataTable

model.cls

+ loadData(tableName, fieldList, condition)

test.p

+ fetchData+ displayData



Demo












Iterating / Looping through .NET eyes

DataStructure examples – Building an Iterator



Demo




• Triggering Publishing• The need for Event Argument Classes• .NET events – Examples

– Defining the event– Subscribing to the event– Publishing the event





• Triggering Publishing• The need for Event Argument Classes• .NET events – Examples





Triggering – You’re gonna hit only one

Event Handling in Progress – Triggering an event

Trigger code



Publishing – You may hit many

Event Handling in .NET – Publishing an event

Event handler



Publishing – examples

Event Handling in .NET – Publishing an event

define event <event-name> void ()

publicprotectedprivate

<event-name>:Publish ()



Subscribing – examples

Event Handling in .NET – Subscribing to an event

Not subscribed

Subscribing

tool<sender>:<event-name>:Subscribe (<name-eventhandler>)



viewCollection.cls

Events provide loose coupling

Event Handling in .NET – Refurbishing the demo

model.cls

+ loadData(tableName,fields, condition)

presenter.cls

- addEntity(tableName,fields, condition) Salesrep

CustomerOrder

Orderline




• Trigger code Event handlers• Triggering Publishing• The need for Event Argument Classes• .NET events – Examples





Sender

Event Handling in .NET – The need for event argument classes

Ильинка, ул № 23103132, г. Москва

Россия

Contents



Demo



Thanks you foryour time



www.proWill.nl

[email protected]@proWill.nl

proWillvanBeek

http://nl.linkedin.com/in/proWill

+316 2206 8535

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NET for Progress Programmers