Question

我正在制作一个能够远程控制相机（Scopia XT5000 - Radvision）等设备的应用程序。我需要向设备发送初始化命令，以便能够发送将控制设备的AT命令。

我发送初始化命令后，服务器应该回复：
字符串

?? \ 0 \ 0 \ 0 AT [＆lt; IP400C9XT5000-03.01.00.0028 \ r ?? \ 0 \ 0 \ 0OK \ r

字节

170 170 0 0 0 32 65 84 91 60 73 80 52 48 48 67 57 88 84 53 48 48 48 45 48 51 46 48 49 46 48 48 46 48 48 50 56 13 170 170 0 0 0 3 79 75 13

当我在这里休息时，我尝试调试并获得这些值

serverStream.Read（inStream，0，inStream.Length）;

但每次我在没有调试或休息的情况下运行程序时，它会给我不同的字符串和字节。就像这样 字符串

?? \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0

字节

170 170 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

可能是什么问题？
是吗：
- 空字节？
- 回车？ “\ r”？
- 多行？

整个代码：

{
    TcpClient clientSocket = new System.Net.Sockets.TcpClient();

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        msg("Client Started");                        
    }

    public void openSocket()
    { 
        if (clientSocket.Connected)
        {
            clientSocket.Close();
        }
        clientSocket = new System.Net.Sockets.TcpClient();
        clientSocket.Connect("10.0.3.202", 55003);
        label1.Text = "Client Socket Program - Server Connected ...";

    }

    private void btnSend_Click(object sender, EventArgs e)
    {
        openSocket();
        //header bytes and initAT bytes are the initialization command for me to send AT commands
        msg("Init: ");
        NetworkStream serverStream = clientSocket.GetStream();
        //header bytes to enable AT command
        byte[] header = {170,170,0,0,0,8 };
        serverStream.Write(header, 0, header.Length);
        serverStream.Flush();
        //Initialize the Interface
        byte[] initAT = System.Text.Encoding.ASCII.GetBytes("AT[&IPV\r"); 
        serverStream.Write(initAT,0, initAT.Length);
        serverStream.Flush();

        byte[] inStream = new byte[10025];
        serverStream.Read(inStream, 0, inStream.Length);
        string returndata = System.Text.Encoding.ASCII.GetString(inStream);
        msg("Data from Server : " + returndata);
    }

    private void btnRight_Click(object sender, EventArgs e)
    {
        msg("Right : ");
        NetworkStream serverStream = clientSocket.GetStream();
        //AT Command to move the main camera to right
        byte[] outStream3 = System.Text.Encoding.ASCII.GetBytes("AT[&SY011R\r");
        serverStream.Write(outStream3, 0, outStream3.Length);

        byte[] inStream2 = new byte[48];
        serverStream.Read(inStream2, 0,inStream2.Length);
        string returndata = System.Text.Encoding.ASCII.GetString(inStream2);            
        msg(returndata);
    }           

    public void msg(string mesg)
    {
        textBox1.Text = textBox1.Text + Environment.NewLine + " >> " + mesg;
    }


}

Answer 1

Read返回读取的字节数。您有一个10025字节的缓冲区，但在Read之后它没有填满。您可能希望循环，直到读取所需的所有字节。

调试时有效，因为花费了额外的时间，网络流有时间完全接收结果，所以当调用Read时，所有数据都可用并放入缓冲区。 / p>

参考：http://msdn.microsoft.com/en-gb/library/system.io.stream.read.aspx

NetworkStream.Read在空字节后没有得到所有字节

1 个答案: