WINFORM判断程序是否运行，且只能运行一个实例代码,CSharp代码库,德仔网

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【CSharp】 WINFORM判断程序是否运行，且只能运行一个实例
作者:Dezai.CN / 发布于2012/3/26/ 432
WINFORM判断程序是否运行，且只能运行一个实例
<div><span style="font-family: verdana; line-height: 21px; ">判断程序是否已经运行，使程序只能运行一个实例有很多方法，下面记录两种，</span></div>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: verdana; line-height: 21px; ">方法1:线程互斥
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; ">
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">static class Program</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">  {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    private static System.Threading.Mutex mutex;</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">
</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// <summary></span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// 应用程序的主入口点。</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// </summary></span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    [STAThread]</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    static void Main()</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      Application.EnableVisualStyles();</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      Application.SetCompatibleTextRenderingDefault(false);</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">
</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      mutex = new System.Threading.Mutex(true, "OnlyRun");</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      if (mutex.WaitOne(0, false))</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        Application.Run(new MainForm());</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      else</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        MessageBox.Show("程序已经在运行！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        Application.Exit();</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">  }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: verdana; line-height: 21px; ">方法2：
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: verdana; line-height: 21px; ">这种检测进程的名的方法，并不绝对有效。因为打开第一个实例后，将运行文件改名后,还是可以运行第二个实例。
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; ">
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">static class Program</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">  {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// <summary></span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// 应用程序的主入口点。</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    /// </summary></span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    [STAThread]</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    static void Main()</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      Application.EnableVisualStyles();</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      Application.SetCompatibleTextRenderingDefault(false);</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">
</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      // get the name of our process</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      string p = System.Diagnostics.Process.GetCurrentProcess().ProcessName;</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      // get the list of all processes by that name</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(p);</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      // if there is more than one process</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      if (processes.Length > 1)</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        MessageBox.Show("程序已经在运行中", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        Application.Exit();</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      else</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      {</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">        Application.Run(new MainForm());</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">      }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">    }</span></font>
<p style="margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; "><font face="verdana"><span style="line-height: 21px;">  }</span></font>
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