C# TcpClient

TcpClient 自己封装的话，还是比较麻烦的，可以基于线程，也可以基于异步写，最好的办法是网上找个插件，我发现一个插件还是非常好用的：STTech.BytesIO.Tcp

下面是这个插件作者的帖子，有兴趣的可以去看看

TcpClient

BytesIO | 零基础轻松看懂 C# TCP客户端（完整源码+视频教程）_sttech.bytesio.tcp-CSDN博客

TcpServer

BytesIO | C# 超简洁的TCP服务端开发（完整源码+视频教程）_c# bytesio-CSDN博客

目前网上大部分帖子都是用 PropertyGrid 控件去实现的，其实没必要

我做了一个简单的界面，如下

代码：

using System;
using System.Collections.Generic;
using System.Windows.Forms;
 
namespace TcpClinetTest2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        STTech.BytesIO.Tcp.TcpClient tcpClient;
 
        private void Form1_Load(object sender, EventArgs e)
        {
            this.tcpClient = new STTech.BytesIO.Tcp.TcpClient();
            //tcp接收数据时触发的事件
            this.tcpClient.OnDataReceived += TcpClient_OnDataReceived;
            //tcp连接成功时触发的事件
            this.tcpClient.OnConnectedSuccessfully += TcpClient_OnConnectedSuccessfully;
            //tcp连接断开时触发的事件
            this.tcpClient.OnDisconnected += TcpClient_OnDisconnected;
        }
 
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (this.tcpClient.IsConnected)
                this.tcpClient.Disconnect();
        }
 
 
        private void TcpClient_OnDisconnected(object sender, STTech.BytesIO.Core.DisconnectedEventArgs e)
        {
            Console.WriteLine($"已断开：{e.ReasonCode}");
        }
 
        private void TcpClient_OnConnectedSuccessfully(object sender, STTech.BytesIO.Core.ConnectedSuccessfullyEventArgs e)
        {
            Console.WriteLine("连接成功");
        }
 
        private void TcpClient_OnDataReceived(object sender, STTech.BytesIO.Core.DataReceivedEventArgs e)
        {
            Console.WriteLine($"收到数据：{e.Data.EncodeToString("GBK")}");
        }
 
        //连接
        private void Button_Connect_Click(object sender, EventArgs e)
        {
            this.tcpClient.Host = "192.168.xx.xx";
            this.tcpClient.Port = 6666;
            var result = this.tcpClient.Connect();
            Console.WriteLine($"结果：{result.IsSuccess}，错误码：{result.ErrorCode}");
        }
 
        //断开
        private void Button_Disconnect_Click(object sender, EventArgs e)
        {
            this.tcpClient?.Disconnect();
        }
 
        //发送
        private void Button_Send_Click(object sender, EventArgs e)
        {
            string message = TextBox_Message.Text;
            if (string.IsNullOrEmpty(message))
            {
                Console.WriteLine("消息框为空");
                return;
            }
 
            this.tcpClient.Send(message.GetBytes("GBK"));
        }
 
        //清空控制台
        private void Button_ClearConsole_Click(object sender, EventArgs e)
        {
           Console.Clear();
        }
 
        //获取在线状态
        private void Button_GetOnlineStatus_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"在线状态：{this.tcpClient.IsConnected}");
        }
    }
}

在上面的代码中，message.GetBytes("GBK")  是插件作者封装的拓展方法，如下

public static byte[] GetBytes(this string str, string encodeName = "UTF-8")
{
    return Encoding.GetEncoding(encodeName).GetBytes(str);
}

可以看到，这里用的 Encoding.GetEncoding(encodeName) 去获取 Encoding 编码格式

常见的编码格式有：

utf-8

us-ascii

windows-1252

iso-8859-1

gb2312

gbk

big5

shift_jis

Euc-kr

用法：

Encoding encoding = Encoding.GetEncoding("gb2312");

也可以使用下面代码来查看有那些编码格式

foreach (EncodingInfo encInfo in Encoding.GetEncodings())
{
    Console.WriteLine($"{encInfo.CodePage} - {encInfo.Name}");
}

end