Asynchronous Upload of Large File Using HttpWebRequest in C#.Net [closed]

Answer 1

Does it have to be a HttpWebRequest? You can do this very easily with the WebClient object

public void UploadFile(byte[] fileData)
{
    var client = new WebClient();
    client.UploadDataCompleted += client_UploadDataCompleted;
    client.UploadDataAsync(new Uri("http://myuploadlocation.example.com/"), fileData);
}

void client_UploadDataCompleted(object sender, UploadDataCompletedEventArgs e)
{
    if (e.Error != null)
    {
        MessageBox.Show(e.Error.Message);
    }

    byte[] response = e.Result;
}

Answer 2

If you have to use HttpWebRequest and assuming your input data stream is not large you can make the upload process Async by doing this. Notice the BeginGetResponse is what actually opens the connection to the remote server and processes the upload.

public void UploadAsync()
{
    var data = GetStream("TestFile.txt");

    var request = (HttpWebRequest)WebRequest.Create(new Uri("http://example.com/UploadData"));
    request.Method = "POST";
    data.CopyTo(request.GetRequestStream());

    request.BeginGetResponse(DataUploadCompleted, request);

    Console.WriteLine("Upload Initiated.");
}

private void DataUploadCompleted(IAsyncResult ar)
{
    var request = (HttpWebRequest)ar.AsyncState;
    var response = request.EndGetResponse(ar);
    Console.WriteLine("Upload Complete.");
}