Question

我一直在试图弄清楚如何通过TCP服务器发送和接收XML数据。我来自java编程背景，所以我有点超出我的深度。如果我只发送纯文本，我的程序可以工作，但是一旦我尝试发送xml数据，它就会挂起。服务器永远不会收到消息。我一直在寻找代码来做到这一点，并没有找到任何运气，我已经看到许多在线的代码示例不起作用。如果你们中的任何一个人能解决这个问题，我将非常感激。

请在这里查找代码示例，而不是解释我应该怎么做才能修复它。我只用C＃编写了几天。以下是XML请求示例。

    <?xml version="1.0" encoding="utf-8"?>
    <ClientRequest>
      <Product>AGENT</Product>
      <Method>GET_SYSTEM_INFO</Method>
      <ClientId>UMOHB</ClientId>
      <Params>
        <Param Value="umohb" Key="username" />
        <Param Value="password" Key="password" />
        <Param Value="localhost" Key="hostname" />
      </Params>
    </ClientRequest>

这是我的TCP客户端代码

    public static void sendStringRequest(String hostname, int port, String message)
    {
        String response = String.Empty;
        TcpClient client = getConnection(hostname, port);

        Console.WriteLine(message);

        NetworkStream stream = client.GetStream();
        StreamWriter writer = new StreamWriter(stream, Encoding.UTF8);
        writer.AutoFlush = false;
        writer.Write(Encoding.UTF8.GetBytes(message).Length);
        writer.Write(message);
        writer.Flush();

        StreamReader reader = new StreamReader(stream, Encoding.UTF8);
        response = reader.ReadLine();

        stream.Close();
    }

Answer 1

在你冲洗作家之前不要阅读。

NetworkStream stream = client.GetStream();
StreamWriter writer = new StreamWriter(stream, Encoding.UTF8);
writer.AutoFlush = false;
writer.Write(Encoding.UTF8.GetBytes(message).Length);
writer.Write(message);
writer.Flush();

StreamReader reader = new StreamReader(stream, Encoding.UTF8);
response = reader.ReadLine();

stream.Close();

Answer 2

尝试这样的事情：

public static string sendStringRequest(String hostname, int port, string message) {

 try {
  byte[] data = System.Text.Encoding.ASCII.GetBytes(message);

  TcpClient client = new TcpClient(hostname, port);

  NetworkStream stream = client.GetStream();
  BinaryWriter writer = new BinaryWriter(stream);

  //first 4 bytes - length!
  writer.Write(Convert.ToByte("0"));
  writer.Write(Convert.ToByte("0"));
  writer.Write(Convert.ToByte("0"));
  writer.Write(Convert.ToByte(data.Length));
  writer.Write(data);

  data = new Byte[256];

  // String to store the response ASCII representation.
  String responseData = String.Empty;

  Int32 bytes = stream.Read(data, 0, data.Length);

  responseData = System.Text.Encoding.ASCII.GetString(data, 4, (bytes - 4));

  // Close everything.
  stream.Close();
  client.Close();
  return responseData;
 } catch (ArgumentNullException e) {
  MessageBox.Show("ArgumentNullException: " + e);
  return "null";
 } catch (SocketException e) {
  MessageBox.Show("SocketException: " + e);
  return "null";
 }

}

通过TCP发送和接收XML数据

2 个答案: