private static void EndGetStreamCallback(IAsyncResult ar)
{
FtpState state = (FtpState)ar.AsyncState;
Stream requestStream = null;
// End the asynchronous call to get the request stream.
try
{
requestStream = state.Request.EndGetRequestStream(ar);
// Copy the file contents to the request stream.
const int bufferLength = 2048;
byte[] buffer = new byte[bufferLength];
int count = 0;
int readBytes = 0;
FileStream stream = File.OpenRead(state.FileName);
do
{
readBytes = stream.Read(buffer, 0, bufferLength);
requestStream.Write(buffer, 0, readBytes);
count += readBytes;
}while (readBytes != 0);
// IMPORTANT: Close the request stream before sending the request.
requestStream.Close();
// Asynchronously get the response to the upload request.
state.Request.BeginGetResponse(new AsyncCallback(EndGetResponseCallback), state);
}
// Return exceptions to the main application thread.
catch (Exception e)
{
state.OperationException = e;
state.OperationComplete.Set();
return;
}
}
// The EndGetResponseCallback method
// completes a call to BeginGetResponse.
private static void EndGetResponseCallback(IAsyncResult ar)
{
FtpState state = (FtpState)ar.AsyncState;
FtpWebResponse response = null;
try
{
response = (FtpWebResponse)state.Request.EndGetResponse(ar);
response.Close();
state.StatusDescription = response.StatusDescription;
// Signal the main application thread that
// the operation is complete.
state.OperationComplete.Set();
}
// Return exceptions to the main application thread.
catch (Exception e)
{
state.OperationException = e;
state.OperationComplete.Set();
}
}
public static void UploadFile(string fileName)
{
// Create a Uri instance with the specified URI string.
// If the URI is not correctly formed, the Uri constructor
// will throw an exception.
ManualResetEvent waitObject;
FTPSettings ftpSettings = new FTPSettings();
string uriPath = ftpSettings.Path.Trim('/') + "/" + Path.GetFileName(fileName);
FtpState state = new FtpState();
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new UriBuilder("ftp", ftpSettings.Host, ftpSettings.Port, uriPath).Uri);
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential(ftpSettings.UserName, ftpSettings.Password);
// Store the request in the object that we pass into the
// asynchronous operations.
state.Request = request;
state.FileName = fileName;
// Get the event to wait on.
waitObject = state.OperationComplete;
// Asynchronously get the stream for the file contents.
request.BeginGetRequestStream(new AsyncCallback(EndGetStreamCallback), state);
// Block the current thread until all operations are complete.
waitObject.WaitOne();
// The operations either completed or threw an exception.
if (state.OperationException != null)
{
throw state.OperationException;
}
}