handling faults in WCF

Specifying and handling faults in WCF

ms-help://MS.MSSDK.1033/MS.NETFX30SDK.1033/WCF_con/html/a9696563-d404-4905-942d-1e0834c26dea.htm 

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In this article,  it is discussed  how and when to convert DotNet exceptions to WCF faults and sent them to the clients. The folowing main contents included:

• Error handling overview
• Defining and specifying faults

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namespace  Microsoft.WCF.Documentation
{
  [ServiceContract(Namespace = " http://microsoft.wcf.documentation " )]
   public   interface  ISampleService{
    [OperationContract]
    [FaultContractAttribute(
       typeof (GreetingFault),
      Action = " http://www.contoso.com/GreetingFault " ,
      ProtectionLevel = ProtectionLevel.EncryptAndSign
      )]
     string  SampleMethod( string  msg);
  }
 
  [DataContractAttribute]
   public   class  GreetingFault
  { 
     private   string  report;

     public  GreetingFault( string  message)
    {
       this .report  =  message;
    }

    [DataMemberAttribute]
     public   string  Message
    {
       get  {  return   this .report; }
       set  {  this .report  =  value; }
    }
  }

   class  SampleService : ISampleService
  {
   #region  ISampleService Members

   public   string   SampleMethod( string  msg)
  {
    Console.WriteLine( " Client said:  "   +  msg);
     //  Generate intermittent error behavior.
    Random rand  =   new  Random(DateTime.Now.Millisecond);
     int  test  =  rand.Next( 5 );
     if  (test  %   2   !=   0 )
       return   " The service greets you:  "   +  msg; 
     else
       throw   new  FaultException < GreetingFault > ( new  GreetingFault( " A Greeting error occurred. You said:  "   +  msg));
  }

   #endregion
  }
}