/// <summary>
/// Internal implementation of the multi-part POST request.
/// </summary>
static void PostMultiPartAsync(HttpWebRequest request, IEnumerable <HttpContentItem> contentItems, AsyncCallback callback)
{
request.Method = "POST";
string boundary = "---------------" + DateTime.Now.Ticks.ToString();
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.BeginGetRequestStream(new AsyncCallback(asyncResult =>
{
Stream stream = request.EndGetRequestStream(asyncResult);
DataContractMultiPartSerializer ser = new DataContractMultiPartSerializer(boundary);
ser.WriteContent(stream, contentItems);
stream.Close();
request.BeginGetResponse(callback, request);
}), request);
}
/// <summary>
/// Helper method to perform a multi-part post. If dispatcher is null, the callback occurs on a different thread.
/// </summary>
public static void MultiPartPostAsync(Uri uri, IEnumerable <HttpContentItem> contentItems, Dispatcher dispatcher, EventHandler <MultiPartPostEventArgs> callback)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
string boundary = "---------------" + DateTime.Now.Ticks.ToString();
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.BeginGetRequestStream(new AsyncCallback(asyncResult =>
{
Stream stream = request.EndGetRequestStream(asyncResult);
DataContractMultiPartSerializer ser = new DataContractMultiPartSerializer(boundary);
ser.WriteContent(stream, contentItems);
stream.Close();
request.BeginGetResponse(new AsyncCallback(asyncResult2 =>
{
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asyncResult2);
if (dispatcher == null)
{
callback(null, new MultiPartPostEventArgs()
{
Result = response.GetResponseStream()
});
response.Close();
}
else // switch to the dispatcher thread
{
dispatcher.BeginInvoke(delegate
{
callback(null, new MultiPartPostEventArgs()
{
Result = response.GetResponseStream()
});
response.Close();
});
}
}), request);
}), request);
}