/// <summary>
/// Ends executing this async request.
/// </summary>
/// <param name="asyncResult">The async result</param>
/// <returns>Service response object.</returns>
internal object EndInternalExecute(IAsyncResult asyncResult)
{
// We have done enough validation before
AsyncRequestResult asyncRequestResult = (AsyncRequestResult)asyncResult;
IEwsHttpWebResponse response = this.EndGetEwsHttpWebResponse(asyncRequestResult.WebRequest, asyncRequestResult.WebAsyncResult);
return(this.ReadResponse(response));
}
/// <summary>
/// Async callback method for HttpWebRequest async requests.
/// </summary>
/// <param name="webAsyncResult">An IAsyncResult that references the asynchronous request.</param>
private static void WebRequestAsyncCallback(IAsyncResult webAsyncResult)
{
WebAsyncCallStateAnchor wrappedState = webAsyncResult.AsyncState as WebAsyncCallStateAnchor;
if (wrappedState != null && wrappedState.AsyncCallback != null)
{
AsyncRequestResult asyncRequestResult = new AsyncRequestResult(
wrappedState.ServiceRequest,
wrappedState.WebRequest,
webAsyncResult, /* web async result */
wrappedState.AsyncState /* user state */);
// Call user's call back
wrappedState.AsyncCallback(asyncRequestResult);
}
}
/// <summary>
/// Extracts the original service request from the specified IAsyncResult instance
/// </summary>
/// <typeparam name="T">Desired service request type</typeparam>
/// <param name="exchangeService">The ExchangeService object to validate the integrity of asyncResult</param>
/// <param name="asyncResult">An IAsyncResult that references the asynchronous request.</param>
/// <returns>The original service request</returns>
public static T ExtractServiceRequest <T>(ExchangeService exchangeService, IAsyncResult asyncResult) where T : SimpleServiceRequestBase
{
// Validate null first
EwsUtilities.ValidateParam(asyncResult, "asyncResult");
AsyncRequestResult asyncRequestResult = asyncResult as AsyncRequestResult;
if (asyncRequestResult == null)
{
// Strings.InvalidAsyncResult is copied from the error message of HttpWebRequest.EndGetResponse()
// Just use this simple string for all kinds of invalid IAsyncResult parameters
throw new ArgumentException(Strings.InvalidAsyncResult, "asyncResult");
}
// Validate the service request
if (asyncRequestResult.ServiceRequest == null)
{
throw new ArgumentException(Strings.InvalidAsyncResult, "asyncResult");
}
//Validate the service object
if (!Object.ReferenceEquals(asyncRequestResult.ServiceRequest.Service, exchangeService))
{
throw new ArgumentException(Strings.InvalidAsyncResult, "asyncResult");
}
// Validate the request type
T serviceRequest = asyncRequestResult.ServiceRequest as T;
if (serviceRequest == null)
{
throw new ArgumentException(Strings.InvalidAsyncResult, "asyncResult");
}
return(serviceRequest);
}
