InvalidDataContractException Class

Definition

public ref class InvalidDataContractException : Exception

public class InvalidDataContractException : Exception

[System.Serializable]
public class InvalidDataContractException : Exception

type InvalidDataContractException = class
 inherit Exception

[<System.Serializable>]
type InvalidDataContractException = class
 inherit Exception

Public Class InvalidDataContractException
Inherits Exception

Inheritance

Object

Exception

InvalidDataContractException

Attributes

SerializableAttribute

Examples

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
{
 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;
 }
}

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

Remarks

An instance of this type will be thrown if the DataContractSerializer or NetDataContractSerializer detects that the type of the instance being serialized or deserialized is invalid. An instance of this type will also be thrown if an invalid type is passed to the schema import or export engine.

See also

• DataContractSerializer
• Using Data Contracts