FtpWebRequest.EndGetResponse Method (IAsyncResult)


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Ends a pending asynchronous operation started with BeginGetResponse.

Namespace:   System.Net
Assembly:  System (in System.dll)

public override WebResponse EndGetResponse(
	IAsyncResult asyncResult


Type: System.IAsyncResult

The IAsyncResult that was returned when the operation started.

Return Value

Type: System.Net.WebResponse

A WebResponse reference that contains an FtpWebResponse instance. This object contains the FTP server's response to the request.

Exception Condition

asyncResult is null.


asyncResult was not obtained by calling BeginGetResponse.


This method was already called for the operation identified by asyncResult.


An error occurred using an HTTP proxy.

If the operation has not completed at the time the EndGetResponse method is called, EndGetResponse blocks until the operation completes. To prevent blocking, check the IsCompleted property before calling EndGetResponse.

In addition to the exceptions noted in "Exceptions," EndGetResponse rethrows exceptions that were thrown while communicating with the server.


This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.

Notes to Callers:

This method generates network traffic.

The following code example demonstrates ending an asynchronous operation to get a response. This code example is part of a larger example provided for the FtpWebRequest class overview.

// The EndGetResponseCallback method  
// completes a call to BeginGetResponse.
private static void EndGetResponseCallback(IAsyncResult ar)
    FtpState state = (FtpState) ar.AsyncState;
    FtpWebResponse response = null;
        response = (FtpWebResponse) state.Request.EndGetResponse(ar);
        state.StatusDescription = response.StatusDescription;
        // Signal the main application thread that 
        // the operation is complete.
    // Return exceptions to the main application thread.
    catch (Exception e)
        Console.WriteLine ("Error getting response.");
        state.OperationException = e;

.NET Framework
Available since 2.0
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