C#编写网游客户端的实现

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private NetworkStream stream;
private TcpClient tcpClient = new TcpClient();
public Form1()
{
    InitializeComponent();
    try
    {
        //向指定的IP地址的服务器发出连接请求
        tcpClient.Connect("10.1.230.74", 3900);
        listBox1.Items.Add("连接成功！");
        stream = tcpClient.GetStream();
        byte[] data = new byte[1024];
        //判断网络流是否可读            
        if (stream.CanRead)
        {
            int len = stream.Read(data, 0, data.Length);
            //Encoding ToEncoding = Encoding.GetEncoding("UTF-8");
            //Encoding FromEncoding = Encoding.GetEncoding("GB2312");
            //data=Encoding.Convert(FromEncoding, ToEncoding, data);
            //string msg = Encoding.UTF8.GetString(data, 0, data.Length);
            string msg = Encoding.Default.GetString(data, 0, data.Length);
            string str = "rn";
            char[] str1 = str.ToCharArray();
            string[] msg1 = msg.Split(str1);
            for (int j = 0; j < msg1.Length; j++)
            {
                listBox1.Items.Add(msg1[j]);
            }
        }
    }
    catch
    {
        listBox1.Items.Add("服务器未启动！");
    }
}

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//判断连接是否断开
if (tcpClient.Connected)
{
    //向服务器发送数据
    string msg = textBox1.Text;
    Byte[] outbytes = System.Text.Encoding.Default.GetBytes(msg + "n");
    stream.Write(outbytes, 0, outbytes.Length);
    byte[] data = new byte[1024];
    //接收服务器回复数据
    if (stream.CanRead)
    {
        int len = stream.Read(data, 0, data.Length);
        string msg1 = Encoding.Default.GetString(data, 0, data.Length);
        string str = "rn";
        char[] str1 = str.ToCharArray();
        string[] msg2 = msg1.Split(str1);
        for (int j = 0; j < msg2.Length; j++)
        {
            listBox1.Items.Add(msg2[j]);
        }
    }
}
else
{
    listBox1.Items.Add("连接已断开");
}

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int flag = 0;
private void timer1_Tick(object sender, EventArgs e)
{
    flag++;
    string picturePath = @"C:Users16438Desktopgame1game1game1binDebugimg" + flag + ".jpg";
    pictureBox1.Image = Image.FromFile(picturePath);
    if (flag == 3)
    {
        flag = 0;
    }
}