1 /// <summary>
2 /// 不重复运行程序
3 /// </summary>
4 /// <returns></returns>
5 private static Process RunningInstance()
6 {
7 Process current = Process.GetCurrentProcess();
8 Process[] processes = Process.GetProcessesByName(current.ProcessName);
9 //遍历与当前进程名称相同的进程列表
10 foreach (Process process in processes)
11 {
12 //如果实例已经存在则忽略当前进程
13 if (process.Id != current.Id)
14 {
15 //保证要打开的进程同已经存在的进程来自同一文件路径
16 if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
17 {
18 //返回已经存在的进程
19 return process;
20 }
21 }
22 }
23 return null;
24 }
25 // 将窗口放置最前端
26 [DllImport("User32.dll")]
27 private static extern bool ShowWindowAsync(System.IntPtr hWnd, int cmdShow);
28 [DllImport("User32.dll")]
29 private static extern bool SetForegroundWindow(System.IntPtr hWnd);
30
31 private static void HandleRunningInstance(Process instance)
32 {
33 ShowWindowAsync(instance.MainWindowHandle, 1); //调用api函数,正常显示窗口
34 SetForegroundWindow(instance.MainWindowHandle); //将窗口放置最前端
35 }
Program
Process instance = RunningInstance();
if (instance == null)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
else
{
//1.2 已经有一个实例在运行
HandleRunningInstance(instance);
}
作者:꧁执笔小白꧂