InvalidDataContractException Class
The exception that is thrown when the DataContractSerializer or NetDataContractSerializer encounters an invalid data contract during serialization and deserialization.
Assembly: System.Runtime.Serialization (in System.Runtime.Serialization.dll)
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.
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
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.