static void AddServiceAsyncWithDataContract()
{
try
{
Console.Title = "Asynchronous Pattern in Windows Communication Foundation";
Console.WriteLine("Enter first number:");
int number1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter second number:");
int number2 = Convert.ToInt32(Console.ReadLine());
AddDataContract input = new AddDataContract
{
Nbr1 = number1,
Nbr2 = number2
};
Console.ForegroundColor = ConsoleColor.Yellow;
_addServiceProxy = new ProxyFactory <IAddService>("AddService");
_service = _addServiceProxy.CreateProxy();
Console.WriteLine("Service Proxy created.");
Console.WriteLine("Calling BeginAdd of WCF service");
IAsyncResult res = _service.BeginAddDC(input, new AsyncCallback(AddCallbackDC), _service);
Console.WriteLine("Sent request BeginAdd of WCF service");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
Console.ResetColor();
}
}
public AddDataContract EndAddDC(IAsyncResult ar)
{
AddDataContract result = null;
try
{
if (ar != null)
{
using (AddAsyncResult asyncResult = ar as AddAsyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("IAsyncResult parameter is null.");
}
if (asyncResult.Exception != null)
{
throw asyncResult.Exception;
}
asyncResult.AsyncWait.WaitOne();
result = asyncResult.AddContract;
}
}
}
catch (Exception ex)
{
ErrorInfo err = new ErrorInfo(ex.Message, "EndAddDC faills");
throw new FaultException <ErrorInfo>(err, "reason goes here.");
}
return(result);
}
public IAsyncResult BeginAddDC(AddDataContract input, AsyncCallback callback, object state)
{
AddAsyncResult asyncResult = null;
try
{
asyncResult = new AddAsyncResult(input, callback, state);
//Queues a method for execution. The method executes when a thread pool thread becomes available.
ThreadPool.QueueUserWorkItem(new WaitCallback(CallbackDC), asyncResult);
}
catch (Exception ex)
{
ErrorInfo err = new ErrorInfo(ex.Message, "BeginAddDC faills");
throw new FaultException <ErrorInfo>(err, "reason goes here.");
}
return(asyncResult);
}
private AddDataContract InternalAdd(AddDataContract input)
{
Thread.Sleep(TimeSpan.FromSeconds(20)); //模拟处理复杂运算
input.Result = input.Nbr1 + input.Nbr2;
return(input);
}
public AddAsyncResult(AddDataContract input, AsyncCallback callback, object state)
: base(callback, state)
{
this.AddContract = input;
}
