What
is Fault Contract?
Any
unexpected error occurred in WCF service can be returned to the client by using
Fault Contract.
Process to use Fault Contract in WCF service.
WCF Service:
Step 1:
Add a data contract in WCF service to
return error details to the client; you can also use your existing data
contract by adding more properties in it to return error details.
Ex:-
[DataContract]
public class MYWCFFaultContract
{
[DataMember]
public bool Result { get; set; }
[DataMember]
public string ErrorMessage { get;
set; }
[DataMember]
public string ErrorDetails { get;
set; }
}
Step 2:
Add fault contract attribute in the interface Method.
Ex:-
[ServiceContract]
public interface IMyWCFService
{
[OperationContract]
[FaultContract(typeof(MYWCFFaultContract))]
void InsertEmployee(MyWCFDataContract
obj);
}
Step
3:
Add try catch block in your method, set value to the properties of fault
under catch and throw the exception out of the service
Try
{
\\ Your code
}
catch (Exception ex)
{
objResult.Result = false;
objResult.ErrorMessage = "Error Occured in InsertEmployee() method";
objResult.ErrorDetails =
ex.ToString();
throw
new FaultException<MYWCFFaultContract>(objResult, ex.ToString());
}
Client Application:
Step
1:
Add reference to below namespace on page
using System.ServiceModel;
Step
2:
Add try catch block in your code and under catch write the code handle the
exception thrown by service
Try
{
\\ Your code
}
catch (FaultException<ServiceReference1.MYWCFFaultContract> excep)
{
lblException.Text =
excep.Detail.ErrorMessage + " " +
excep.Detail.ErrorDetails;
}
So by this way details of error
occurred in service can be returned to the client.
