internal IAsyncResult BeginExecute(int timeout,
Stream userStream,
string file,
long offset,
long length,
AsyncCallback cb,
object state)
{
GetFile_SO stateObj = null;
SetProgress(true);
try
{
CreateDTP();
stateObj = new GetFile_SO(userStream, cb, state);
string cmd = "RETR " + file;
_currentDTP.BeginExecute(timeout,
cmd,
_client.DataType,
offset,
new DTPStreamCommon(userStream, DTPStreamType.ForWriting, length),
new AsyncCallback(this.RunDTP_End),
stateObj);
}
catch
{
SetProgress(false);
CheckDisposed();
throw;
}
return(stateObj);
}
void RunDTP_End(IAsyncResult ar)
{
GetFile_SO stateObj = (GetFile_SO)ar.AsyncState;
try
{
stateObj.UpdateContext();
_currentDTP.EndExecute(ar);
}
catch (Exception e)
{
stateObj.Exception = e;
}
catch
{
NSTrace.WriteLineError("Non-CLS exception at: " + Environment.StackTrace);
throw;
}
stateObj.SetCompleted();
}
