https://www.cnblogs.com/yangfengwu/p/11192594.html
自行调整页面
连接上以后主动发个数据
namespace TCPClient { public partial class Form1 : Form { private TcpClient myTcpClient = null;// TcpClient Thread ConnectThread;//连接线程 string ipAddress;//记录ip地址 int Port = 0;//端口号 private NetworkStream networkstrem = null;//获取网络数据用 private Thread ReceiveThread;//接收消息线程 public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { getIPAddress();//刚才写的那个函数.获取电脑IP,并显示在下拉框 } /// <获取本机 IP 地址> /// /// </summary> /// <returns></returns> private void getIPAddress() { IPAddress[] hostipspool = Dns.GetHostAddresses("");//获取本机所以IP comboBox1.Items.Clear();//清除下拉框里面的内容 foreach (IPAddress ipa in hostipspool) { if (ipa.AddressFamily == AddressFamily.InterNetwork) { comboBox1.Items.Add(ipa.ToString());//下拉框加入IP数据 comboBox1.SelectedIndex = comboBox1.Items.Count > 0 ? 0 : -1;//显示第一个 } } } private void ConnectMethod() { myTcpClient = new TcpClient(); //实例化myTcpClient try { myTcpClient.Connect(ipAddress, Port);//连接服务器 networkstrem = myTcpClient.GetStream();//获取数据流操作实例.(给的方法就是这个......) try { networkstrem.Write(new byte[] { 0x31, 0x32, 0x33 }, 0,3);//发送数据,"123" } catch { } //连接上以后往下执行 Invoke((new Action(() => { button1.Text = "断开"; }))); } catch (Exception) { //异常处理函数 Invoke((new Action(() => { button1.Text = "连接"; }))); try { myTcpClient.Close(); }catch { } //关闭连接 } } //连接和断开按钮 private void button1_Click(object sender, EventArgs e) { if (button1.Text == "连接") { ipAddress = comboBox1.Text.ToString();//获取IP地址 Port = Convert.ToInt32(textBox1.Text.ToString());//获取端口号 ConnectThread = new Thread(ConnectMethod);//创建任务 ConnectThread.Start();//启动任务 } else { try { myTcpClient.Close(); } catch { } //关闭连接 Invoke((new Action(() => { button1.Text = "连接"; }))); } } private void comboBox1_DropDown(object sender, EventArgs e) { getIPAddress();//刚才写的那个函数 } } }
测试
现在写接收数据,然后显示
/// <接收消息线程> /// /// </summary> private void ReceiveDataMethod() { int RecvCnt = 0; byte[] recvBytes = new byte[1024]; while (true) { try { RecvCnt = networkstrem.Read(recvBytes, 0, recvBytes.Length);//获取数据 Invoke((new Action(() => { //new ASCIIEncoding().GetString(recvBytes, 0, RecvCnt)//byte转化为字符串 textBox2.AppendText(new ASCIIEncoding().GetString(recvBytes, 0, RecvCnt));//追加显示 }))); } catch (Exception ex) { //异常处理函数 Invoke((new Action(() => { button1.Text = "连接"; }))); try { ReceiveThread.Abort(); }//销毁任务 catch { } try { networkstrem.Dispose(); }//释放资源 catch { } try { myTcpClient.Close(); }//关闭TCP catch { } } } }
测试
关闭窗体的时候,关闭下TCP
再优化一下,,检测服务器主动断开
//检测服务器是主动断开 if ((myTcpClient.Client.Poll(20, SelectMode.SelectRead)) && (myTcpClient.Client.Available == 0)) { myTcpClient.Close();//关闭以后,后面程序会引发异常 }
测试
现在写发送,自行双击那个按钮,,,让软件添加上那个按钮的点击事件
byte[] sendbyte = Encoding.Default.GetBytes(textBox3.Text.ToString());//获取发送的数据,转为byte if (sendbyte.Length > 0) { try { networkstrem.Write(sendbyte, 0, sendbyte.Length); }//发送数据 catch (Exception) { MessageBox.Show("请检查连接", "提示!"); } } else { MessageBox.Show("数据不能为空", "提示!"); }
测试
然后做个 Hex发送
/// <字符串转16进制格式,不够自动前面补零> /// "0054FF" ==> 16进制 0x00 0x54 0xFF /// </summary> /// <param name="hexString"></param> /// <returns></returns> private static byte[] strToToHexByte(String hexString) { int i; bool Flag = false; hexString = hexString.Replace(" ", "");//清除空格 if ((hexString.Length % 2) != 0) { Flag = true; } if (Flag == true) { byte[] returnBytes = new byte[(hexString.Length + 1) / 2]; try { for (i = 0; i < (hexString.Length - 1) / 2; i++) { returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16); } returnBytes[returnBytes.Length - 1] = Convert.ToByte(hexString.Substring(hexString.Length - 1, 1).PadLeft(2, ‘0‘), 16); } catch { for (i = 0; i < returnBytes.Length; i++) { returnBytes[i] = 0; } MessageBox.Show("超过16进制范围A-F,已初始化为0", "提示"); } return returnBytes; } else { byte[] returnBytes = new byte[(hexString.Length) / 2]; try { for (i = 0; i < returnBytes.Length; i++) { returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16); } } catch { for (i = 0; i < returnBytes.Length; i++) { returnBytes[i] = 0; } MessageBox.Show("超过16进制范围A-F,已初始化为0", "提示"); } return returnBytes; } }
测试
好了,hex显示 和清除 大家自己搞定哈,,,
https://www.cnblogs.com/yangfengwu/p/11192618.html
原文地址:https://www.cnblogs.com/yangfengwu/p/11192603.html
时间: 2024-10-08 03:45:48