How to use HttpWebRequest (.NET) asynchronously?

Question

How can I use HttpWebRequest (.NET, C#) asynchronously?

Answer 1

Check out this article on Developer Fusion: http://www.developerfusion.com/code/4654/asynchronous-httpwebrequest/

Answer 2

Use HttpWebRequest.BeginGetResponse()

HttpWebRequest webRequest;

void StartWebRequest()
{
    webRequest.BeginGetResponse(new AsyncCallback(FinishWebRequest), null);
}

void FinishWebRequest(IAsyncResult result)
{
    webRequest.EndGetResponse(result);
}

The callback function is called when the asynchronous operation is complete. You need to at least call EndGetResponse() from this function.

Answer 3

You can also see the following, for a pretty complete example of doing what Jason is asking:

http://stuff.seans.com/2009/01/05/using-httpwebrequest-for-asynchronous-downloads/

Sean

Answer 4

use async

http://msdn.microsoft.com/en-us/library/system.net.webrequest.endgetrequeststream.aspx