I am getting the
"System.Net.ProtocolViolationException: You must write ContentLength bytes to the request stream before calling [Begin]GetResponse" error when calling to the "BeginGetResponse" method of the web request.
This is my code:
try
{
Stream dataStream = null;
WebRequest Webrequest;
Webrequest = WebRequest.Create(this.EndPointAddress);
Webrequest.Credentials = new NetworkCredential(this.username, this.password);
Webrequest.ContentType = "text/xml";
Webrequest.Method = WebRequestMethods.Http.Post;
byteArray = System.Text.Encoding.UTF8.GetBytes(xmlRequest.Children[0].InnerXML);
Webrequest.ContentLength = byteArray.Length;
dataStream = Webrequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
RequestState rs = new RequestState();
rs.Request = Webrequest;
IAsyncResult r = (IAsyncResult)Webrequest.BeginGetResponse(new AsyncCallback(RespCallback), rs);
}
catch (Exception exc)
{
TRACE.EXCEPTION(exc);
}
finally
{
dataStream.Close();
}
More specifically, after calling to the function "getRequestStream()", the Stream is throwing this exception for the lenght:
'stream.Length' threw an exception of type 'System.NotSupportedException'
What could be causing it?
This finally worked by using:
using (dataStream = Webrequest.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
}
Instead of:
dataStream = Webrequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
Your code should work for .NET 2.0 From 4.0 and up you should close the stream after writing:
dataStream = Webrequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
datastream.Close();
Check to verify that your server is set up to accept large files. You may find that you are running into the 4 meg default limit.
Add the following to your web.config file for larger file uploading:
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="104857600" />
</requestFiltering>
</security>
</system.webServer>