Introducing Two-Way Data Binding using Silverlight 2.0, WCF and LINQ to SQL - Developing a Silverlight 2.0 page to demonstrate Insert functionality

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Let us start with a new solution:

• Create a new Visual Studio 2008 solution.

• Add a new WCF Service project named "DemoEmpService."

• Change "Service1" to "EmpService" everywhere in the project (steps are shown in my previous articles).

• Add a "LINQ to SQL Classes" item to the project ("DemoEmp.dbml").

• Using "Server Explorer," drag and drop "Emp" and "Dept" tables as shown in the following Fig 01.

• Modify "IEmpService.vb" as shown below:

' NOTE: If you change the interface name "IService1" here, you must also update the reference to "IService1" in Web.config.

<ServiceContract()> _

Public Interface IEmpService

<OperationContract()> _

Sub Add(ByVal objEmp As Emp)

End Interface

• Implement the same in "EmpService" (service) class as follows:

Imports System.Data.Linq

Public Class EmpService

Implements IEmpService

Public Sub New()

End Sub

Public Sub Add(ByVal objEmp As Emp) Implements IEmpService.Add

Using ctxt As New DemoEmpDataContext

'adding a new row

ctxt.GetTable(Of Emp).InsertOnSubmit(objEmp)

'saving rows added

ctxt.SubmitChanges()

End Using

End Sub

End Class

• Add a new "Silverlight" project ("DemoSL") to the solution. This in turn will add a "DemoSL.Web" project (Silverlight hoster application) to the solution. Detailed steps are provided in previous articles.

• Add a new "Silverlight user control" ("Page2.xaml") to the "DemoSL" project and modify "Application_Startup" in "App.xaml" as follows:

Private Sub Application_Startup(ByVal o As Object, ByVal e As StartupEventArgs) Handles Me.Startup

Me.RootVisual = New Page2()

End Sub

Next: Developing a Silverlight 2.0 page to demonstrate Add functionality, continued >>
 

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