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/*------------------------------------------
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* 模块名称:确保单进程类
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* 设计作者:张鹏
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* 设计日期:2009-6-4
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* 备注:大风扇吹空香皂盒
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*------------------------------------------*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Net.Sockets;
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using System.IO;
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using System.Threading;
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using System.Net;
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namespace aaaSoft
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{
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/// <summary>
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/// 单进程类
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/// </summary>
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class SingleProcess
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{
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private string GuidString;
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private int TcpPort;
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private TcpListener listener;
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="GuidString">唯一标识符</param>
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/// <param name="TcpPort">监听TCP端口号</param>
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public SingleProcess(string GuidString, int TcpPort)
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{
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this.GuidString = GuidString;
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this.TcpPort = TcpPort;
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}
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/// <summary>
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/// 当第二进程运行时引发
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/// </summary>
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public event EventHandler SecondProcessStart;
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/// <summary>
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/// 开始确保单进程
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/// </summary>
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public void Start()
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{
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try
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{
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listener = new TcpListener(IPAddress.Parse("127.0.0.1"), TcpPort);
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listener.Start();
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Thread trdListen = new Thread(Run);
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trdListen.Start();
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}
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catch
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{
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//说明已经有实例存在
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TcpClient client = new TcpClient();
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client.Connect("127.0.0.1", TcpPort);
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NetworkStream ns = client.GetStream();
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byte[] buffer = Encoding.Default.GetBytes(GuidString);
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ns.Write(buffer, 0, buffer.Length);
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ns.Close();
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Environment.Exit(0);
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}
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}
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/// <summary>
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/// 结束确保单进程
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/// </summary>
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public void Stop()
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{
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listener.Stop();
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}
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private void Run()
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{
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try
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{
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while (true)
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{
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TcpClient client = listener.AcceptTcpClient();
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NetworkStream ns = client.GetStream();
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StreamReader sr = new StreamReader(ns);
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string s = sr.ReadToEnd();
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ns.Close();
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if (s.Equals(GuidString))
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{
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//触发事件
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SecondProcessStart.Invoke(null, null);
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}
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}
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}
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catch { }
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}
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}
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}
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==================================================================
下面是使用示例,仅需要修改Program.cs文件(Demo项目Program.cs文件如下):
==================================================================
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using System;
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using System.Collections.Generic;
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using System.Windows.Forms;
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namespace 单实例运行
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{
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static class Program
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{
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const int TcpPort = 53256;
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const string GuidString = "C0DA3908-7F39-45ad-8E5B-CC47064031EA";
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public static aaaSoft.SingleProcess sp;
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public static Form frmMain;
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/// <summary>
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/// 应用程序的主入口点。
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/// </summary>
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[STAThread]
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static void Main()
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{
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Application.EnableVisualStyles();
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Application.SetCompatibleTextRenderingDefault(false);
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frmMain = new Form1();
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sp = new aaaSoft.SingleProcess(GuidString, TcpPort);
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sp.SecondProcessStart += new EventHandler(sp_SecondProcessStart);
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sp.Start();
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Application.Run(frmMain);
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sp.Stop();
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}
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static void sp_SecondProcessStart(object sender, EventArgs e)
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{
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frmMain.WindowState = FormWindowState.Normal;
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frmMain.Show();
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frmMain.Activate();
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}
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}
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}
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