private void EndGetStreamCallback(IAsyncResult ar)
{
//用户定义对象，其中包含该操作的相关信息,在这里得到FtpWebRequest
FtpWebRequest uploadRequest = (FtpWebRequest)ar.AsyncState;
//结束由BeginGetRequestStream启动的挂起的异步操作
//必须调用EndGetRequestStream方法来完成异步操作
//通常EndGetRequestStream由callback所引用的方法调用
Stream requestStream = uploadRequest.EndGetRequestStream(ar);
FileStream fileStream = File.Open(@"D:\app\result.txt", FileMode.Open);
byte[] buffer = new byte[1024];
int bytesRead;
while (true)
{
bytesRead = fileStream.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
break;
}
//本地的文件流数据写到请求流
requestStream.Write(buffer, 0, bytesRead);
}
requestStream.Close();
fileStream.Close();
//开始以异步方式向FTP服务器发送请求并从FTP服务器接收响应
uploadRequest.BeginGetResponse(new AsyncCallback(EndGetResponseCallback), uploadRequest);
}
public void TransFile(IAsyncResult ar)
{
FileInfo file = ar.AsyncState as FileInfo;
try
{
_requestStream = _uploadRequest.EndGetRequestStream(ar);
_fileStream = File.OpenRead(file.FullName);
byte[] buffer = new byte[1024];
int bytesRead;
if (_currLength < file.Length)
{
//设置Position
_fileStream.Seek(_currLength, SeekOrigin.Begin);
while (true)
{
if (_abort)
{
_uploadRequest.Abort();
break;
}
bytesRead = _fileStream.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
break;
}
_requestStream.Write(buffer, 0, bytesRead);
_currLength += bytesRead;
}
}
RomoveFile(file);
//添加到已完成列表中
if (!_abort)
{
_uploadedFiles.Add(file);
}
if (!_abort)
{
_uploadRequest.BeginGetResponse(new AsyncCallback(UploadNextFile), null);
}
else
{
UploadFile(null);
}
}
catch (Exception e)
{
_result = e.Message;
RomoveFile(file);
UploadFile(null);
}
}
private void EndGetStreamCallback(IAsyncResult ar)
{
Stream requestStream = null;
// End the asynchronous call to get the request stream.
try
{
requestStream = request.EndGetRequestStream(ar);
}
// Return exceptions to the main application thread.
catch (Exception e)
{
Console.WriteLine("Could not get the request stream.");
asyncException = e;
wait.Set();
return;
}
// Write the file contents to the request stream.
requestStream.Write(fileContents, 0, fileContents.Length);
Console.WriteLine ("Writing {0} bytes to the stream.", fileContents.Length);
// IMPORTANT: Close the request stream before sending the request.
requestStream.Close();
}
private static MemoryStream DoOldStyleAsync(FtpWebRequest request, MemoryStream requestBody)
{
if (requestBody != null)
{
IAsyncResult ar = request.BeginGetRequestStream(null, null);
ar.AsyncWaitHandle.WaitOne();
Stream requestStream = request.EndGetRequestStream(ar);
requestBody.CopyTo(requestStream);
requestStream.Close();
}
IAsyncResult ar2 = request.BeginGetResponse(null, null);
ar2.AsyncWaitHandle.WaitOne();
FtpWebResponse response = (FtpWebResponse)request.EndGetResponse(ar2);
MemoryStream responseBody = new MemoryStream();
response.GetResponseStream().CopyTo(responseBody);
response.Close();
return(responseBody);
}
private static MemoryStream DoOldStyleAsync(FtpWebRequest request, MemoryStream requestBody)
{
if (requestBody != null)
{
IAsyncResult ar = request.BeginGetRequestStream(null, null);
ar.AsyncWaitHandle.WaitOne();
Stream requestStream = request.EndGetRequestStream(ar);
requestBody.CopyTo(requestStream);
requestStream.Close();
}
IAsyncResult ar2 = request.BeginGetResponse(null, null);
ar2.AsyncWaitHandle.WaitOne();
FtpWebResponse response = (FtpWebResponse)request.EndGetResponse(ar2);
MemoryStream responseBody = new MemoryStream();
response.GetResponseStream().CopyTo(responseBody);
response.Close();
return responseBody;
}
