Question

我试图发送文件抛出套接字并做到了...... 唯一出错的是，我只能在localhost中发送大文件（大约10 MB以上）... 我无法在真实的网络中传输更大的文件......任何帮助？

客户端：

    byte[] fileNameByte = Encoding.ASCII.GetBytes(shortFileName);
    byte[] fileData = File.ReadAllBytes(longFileName);
    byte[] clientData = new byte[4 + fileNameByte.Length + fileData.Length];
    byte[] fileNameLen = BitConverter.GetBytes(fileNameByte.Length);
    fileNameLen.CopyTo(clientData, 0);
    fileNameByte.CopyTo(clientData, 4);
    fileData.CopyTo(clientData, 4 + fileNameByte.Length);
    TcpClient clientSocket = new TcpClient(remoteHostIP, remoteHostPort);
    NetworkStream networkStream = clientSocket.GetStream();
    networkStream.Write(clientData, 0, clientData.GetLength(0));
    networkStream.Close();

服务器：

    try
    {
    TcpListener tcpListener = new TcpListener(port);
    tcpListener.Start();
    while (true)
    {
        Socket handlerSocket = tcpListener.AcceptSocket();
        if (handlerSocket.Connected)
        {
            string fileName = string.Empty;
            NetworkStream networkStream = new NetworkStream(handlerSocket);
            int thisRead = 0;
            int blockSize = 1024;
            Byte[] dataByte = new Byte[blockSize];
            lock (this)
                {
                    string folderPath = @"c:\";
                    handlerSocket.Receive(dataByte);
                    int fileNameLen = BitConverter.ToInt32(dataByte, 0);
                    fileName = Encoding.ASCII.GetString(dataByte, 4, fileNameLen);
                    Stream fileStream = File.OpenWrite(folderPath + fileName);
                    fileStream.Write(dataByte, 4+fileNameLen,(1024-(4+fileNameLen)));
                    while (true)
                    {

                        thisRead = networkStream.Read(dataByte, 0, blockSize);
                        fileStream.Write(dataByte, 0,thisRead);
                        if (thisRead == 0)
                        break;
                    }
                    fileStream.Close();

                }

            if (NewFileRecieved != null)
            {
                NewFileRecieved(this, fileName);
            }
            handlerSocket = null;
        }
    }

    }
    catch
    {

    }

Answer 1

这听起来可以通过修改app.config（或web.config）文件来解决。这是一个可以修改的条目：

<configuration>
...
    <system.web>

      <httpRuntime maxRequestLength="102400" executionTimeout="3600" />
      ...
    </system.web>
</configuration>

其中maxRequestLength是以KB为单位的最大文件长度。更全面的解释可以在以下网址找到：

http://www.telerik.com/help/aspnet-ajax/upload-uploading-large-files.html

http://www.webdavsystem.com/server/documentation/large_files_iis_asp_net

http://www.c-sharpcorner.com/uploadfile/b19d5a/web-configuration-setting-in-Asp-Net-to-post-larger-file/

[编辑] - 从下面的评论中可以看出，这个实际的答案并没有解决问题，而是向使用异步套接字api提出了解决方案。帮助的完整文章可以在这里找到：

http://blogs.msdn.com/b/codefx/archive/2014/01/10/sample-of-jan-9th-how-to-transfer-large-size-file-with-asynchronous-sockets-api-in-net.aspx

只能在本地主机上发送大文件

1 个答案: