The following example shows a service contract, ICalculator, that includes two methods, Add and MoreData. The MoreData method returns an instance of the ExtraData class, which is also declared in the code. When the implemented interface Calculator runs, an InvalidDataContractException will be thrown because the ExtraData class does not have the DataContractAttribute applied to it.
Public Class Test
Shared Sub Main()
Try
Dim t As New Test()
t.Run()
' Catch the InvalidDataContractException here.
Catch iExc As InvalidDataContractException
Console.WriteLine("You have an invalid data contract: ")
Console.WriteLine(iExc.Message)
Console.ReadLine()
Catch exc As Exception
Console.WriteLine(exc.Message)
Console.WriteLine(exc.ToString())
Console.ReadLine()
End Try
End Sub
Private Sub Run()
' Create a new WSHttpBinding and set the security mode to Message;
Dim b As New WSHttpBinding(SecurityMode.Message)
' Create a ServiceHost instance, and add a metadata endpoint.
Dim baseUri As New Uri("http://localhost:1008/")
Dim sh As New ServiceHost(GetType(Calculator), baseUri)
' Optional. Add a metadata endpoint. The method is defined below.
AddMetadataEndpoint(sh)
' Add an endpoint using the binding, and open the service.
sh.AddServiceEndpoint(GetType(ICalculator), b, "myCalculator")
sh.Open()
Console.WriteLine("Listening...")
Console.ReadLine()
End Sub
Private Sub AddMetadataEndpoint(ByRef sh As ServiceHost)
Dim mex As New Uri("http://localhost:1001/metadata/")
Dim sm As New ServiceMetadataBehavior()
sm.HttpGetEnabled = True
sm.HttpGetUrl = mex
sh.Description.Behaviors.Add(sm)
End Sub
End Class
' This class will cause an InvalidDataContractException to be thrown because
' neither the DataContractAttribute nor DataMemberAttribute has been applied to it.
Public Class ExtraData
Public RandomData As System.Collections.Generic.List(Of String)
End Class
<ServiceContract(ProtectionLevel := System.Net.Security.ProtectionLevel.EncryptAndSign)> _
Interface ICalculator
<OperationContract()> _
Function Add(ByVal a As Double, ByVal b As Double) As Double
<OperationContract()> _
Function MoreData() As ExtraData
End Interface
Public Class Calculator
Implements ICalculator
Public Function Add(ByVal a As Double, ByVal b As Double) As Double _
Implements ICalculator.Add
Return a + b
End Function
Public Function MoreData() As ExtraData Implements ICalculator.MoreData
Dim ex As New ExtraData()
ex.RandomData.Add("Hello")
ex.RandomData.Add("World")
Return ex
End Function
End Class
public class Test
{
static void Main()
{
try
{
Test t = new Test();
t.Run();
}
// Catch the InvalidDataContractException here.
catch(InvalidDataContractException iExc)
{
Console.WriteLine("You have an invalid data contract: ");
Console.WriteLine(iExc.Message);
Console.ReadLine();
}
catch (Exception exc)
{
Console.WriteLine(exc.Message);
Console.WriteLine(exc.ToString() );
Console.ReadLine();
}
}
private void Run()
{
// Create a new WSHttpBinding and set the security mode to Message;
WSHttpBinding b = new WSHttpBinding(SecurityMode.Message);
// Create a ServiceHost instance, and add a metadata endpoint.
Uri baseUri= new Uri("http://localhost:1008/");
ServiceHost sh = new ServiceHost(typeof(Calculator), baseUri);
// Optional. Add a metadata endpoint. The method is defined below.
AddMetadataEndpoint(ref sh);
// Add an endpoint using the binding, and open the service.
sh.AddServiceEndpoint(typeof(ICalculator), b, "myCalculator");
sh.Open();
Console.WriteLine("Listening...");
Console.ReadLine();
}
private void AddMetadataEndpoint(ref ServiceHost sh)
{
Uri mex = new Uri(@"http://localhost:1001/metadata/");
ServiceMetadataBehavior sm = new ServiceMetadataBehavior();
sm.HttpGetEnabled = true;
sm.HttpGetUrl = mex;
sh.Description.Behaviors.Add(sm);
}
}
// This class will cause an InvalidDataContractException to be thrown because
// neither the DataContractAttribute nor DataMemberAttribute has been applied to it.
public class ExtraData
{
public System.Collections.Generic.List<string> RandomData;
}
[ServiceContract(ProtectionLevel=System.Net.Security.ProtectionLevel.EncryptAndSign) ]
interface ICalculator
{
[OperationContract]
double Add(double a, double b);
[OperationContract]
ExtraData MoreData();
}
public class Calculator : ICalculator
{
public double Add(double a, double b)
{
return a + b;
}
public ExtraData MoreData()
{
ExtraData ex = new ExtraData();
ex.RandomData.Add("Hello");
ex.RandomData.Add( "World" );
return ex;
}
}