InvalidDataContractException Classe

Definizione

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

Ereditarietà

Object

Exception

InvalidDataContractException

Attributi

SerializableAttribute

Esempio

Nell'esempio seguente viene illustrato un contratto di servizio, ICalculatorche include due metodi, Add e MoreData. Il metodo MoreData restituisce un'istanza della classe ExtraData, dichiarata anche nel codice. Quando viene eseguita l'interfaccia Calculator implementata, viene generata un'eccezione InvalidDataContractException perché alla classe ExtraData non è applicato l'attributo DataContractAttribute.

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

Commenti

Un'istanza di questo tipo verrà generata se DataContractSerializer o NetDataContractSerializer rileva che il tipo dell'istanza che viene serializzata o deserializzata è non valido. Un'istanza di questo tipo verrà inoltre generata se un tipo non valido viene passato al motore di importazione o esportazione dello schema.

Costruttori

Proprietà

Metodi

Eventi

Si applica a

Vedi anche

• DataContractSerializer
• Uso di contratti dati