标签:激活 color 实例 else int 文件路径 was render ace
static class Program{  /// <summary>  /// 应用程序的主入口点。  /// </summary>  [STAThread]  static void Main()  {    Application.EnableVisualStyles();    Application.SetCompatibleTextRenderingDefault(false);    //1.这里判定是否已经有实例在运行    //只运行一个实例    Process instance = RunningInstance();    if (instance == null)    {      //1.1 没有实例在运行      Application.Run(new frmMain());    }    else    {      //1.2 已经有一个实例在运行      HandleRunningInstance(instance);    }    //Application.Run(new frmMain());  }  //2.在进程中查找是否已经有实例在运行  #region 确保程序只运行一个实例  private static Process RunningInstance()  {    Process current = Process.GetCurrentProcess();    Process[] processes = Process.GetProcessesByName(current.ProcessName);    //遍历与当前进程名称相同的进程列表     foreach (Process process in processes)    {      //如果实例已经存在则忽略当前进程       if (process.Id != current.Id)      {        //保证要打开的进程同已经存在的进程来自同一文件路径        if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)        {          //返回已经存在的进程          return process;        }      }    }    return null;  }  //3.已经有了就把它激活,并将其窗口放置最前端  private static void HandleRunningInstance(Process instance)  {    ShowWindowAsync(instance.MainWindowHandle, 1); //调用api函数,正常显示窗口    SetForegroundWindow(instance.MainWindowHandle); //将窗口放置最前端  }  [DllImport("User32.dll")]  private static extern bool ShowWindowAsync(System.IntPtr hWnd, int cmdShow);  [DllImport("User32.dll")]  private static extern bool SetForegroundWindow(System.IntPtr hWnd);  #endregion}C# WinForm 判断程序是否已经在运行,且只允许运行一个实例
标签:激活 color 实例 else int 文件路径 was render ace
原文地址:http://www.cnblogs.com/bojunyi/p/7219821.html