Form1.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Util;

namespace TcpClientApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private TcpClient Client;
        private void Init()
        {
            Client = new TcpClient();
            Client.HostName = "127.0.0.1";
            Client.Port = 3000;
            Client.DataReceived += Client_DataReceived;
            Client.ConnectionStatusChanged += Client_ConnectionStatusChanged;

        }

        private delegate void DelMethod(object sender, TcpDataReceivedEventArgs e);

        private void Client_DataReceived(object sender, TcpDataReceivedEventArgs e)
        {
            //收到数据
            if (InvokeRequired)
            {
                BeginInvoke(new DelMethod(Client_DataReceived), new object[] { sender, e });
                return;
            }

            if (chkHex.Checked)
            {
                //16进制方式
                txtReceived.Text = txtReceived.Text + DataConv.ToHexStr(e.Data);
            }
            else
            {
                //字符串方式
                txtReceived.Text = txtReceived.Text + e.GetString();
            }

        }

        private void Client_ConnectionStatusChanged(object sender, EventArgs e)
        {
            //连接状态改变
            if (InvokeRequired)
            {
                BeginInvoke(new DelMethod(Client_ConnectionStatusChanged), new object[] { sender, e });