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C# 通过进程名/进程Id 操作窗口/程序

日期：2018-07-25点击：503收藏

1. 判断窗口是否存在

 1 private bool IsWindowExist(IntPtr handle)  2  {  3 return (!(GetWindow(new HandleRef(this, handle), 4) != IntPtr.Zero) && IsWindowVisible(new HandleRef(this, handle)));  4  }  5  6 [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]  7 public static extern IntPtr GetWindow(HandleRef hWnd, int uCmd);  8  9 [DllImport("user32.dll", CharSet = CharSet.Auto)] 10 public static extern bool IsWindowVisible(HandleRef hWnd);

2. 获取窗口句柄

 1 /// <summary>  2 /// 获取应用程序窗口句柄  3 /// </summary>  4 /// <param name="processId"></param>  5 /// <returns></returns>  6 private IntPtr GetWindowHandle(int processId)  7  {  8 var windowHandle = IntPtr.Zero;  9 EnumThreadWindowsCallback windowsCallback = new EnumThreadWindowsCallback(FindMainWindow); 10  EnumWindows(windowsCallback, IntPtr.Zero); 11 //保持循环 12  GC.KeepAlive(windowsCallback); 13 14 bool FindMainWindow(IntPtr handle, IntPtr extraParameter) 15  { 16 int num; 17 GetWindowThreadProcessId(new HandleRef(this, handle), out num); 18 if (num == processId && IsWindowExist(handle)) 19  { 20 windowHandle = handle; 21 return true; 22  } 23 return false; 24  } 25 26 return windowHandle; 27  } 28 public delegate bool EnumThreadWindowsCallback(IntPtr hWnd, IntPtr lParam); 29 30 [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] 31 public static extern bool EnumWindows(EnumThreadWindowsCallback callback, IntPtr extraData); 32 33 [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] 34 public static extern int GetWindowThreadProcessId(HandleRef handle, out int processId);

3. 关闭应用窗口

根据进程Id关闭应用窗口：

 1 /// <summary>  2 /// 关闭程序主窗口  3 /// </summary>  4 /// <param name="processId">进程ID</param>  5 public void CloseWindow(int processId)  6  {  7 var mwh = GetWindowHandle(processId);  8 SendMessage(mwh, MW_CLOSE, 0, 0);  9  } 10 const int MW_CLOSE = 0x0010; 11 12 [DllImport("User32.dll", EntryPoint = "SendMessage")] 13 private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

关闭所有此进程名的窗口：

1 public void CloseAllWindows(string processName) 2  { 3 Process[] processList = Process.GetProcessesByName(processName); 4 foreach (Process process in processList) 5  { 6  CloseMainWindow(process.Id); 7  } 8 }

当然，直接杀进程，是最快的方法：

 1 /// <summary>  2 /// 关闭所有进程  3 /// </summary>  4 /// <param name="processName"></param>  5 /// <returns></returns>  6 public static bool CloseAllProcesses(string processName)  7  {  8 try  9  { 10 Process[] psEaiNotes = Process.GetProcessesByName(processName); 11 foreach (Process psEaiNote in psEaiNotes) 12  { 13  psEaiNote.Kill(); 14  } 15  } 16 catch 17  { 18 return false; 19  } 20 21 return true; 22 }

4. 重启程序

 1 string appFileName = currentClientProcess.MainModule.FileName;  2  3 Process newClient = new Process();  4 newClient.StartInfo.FileName = appFileName;  5 // 设置要启动的进程的初始目录  6 newClient.StartInfo.WorkingDirectory = System.Windows.Forms.Application.ExecutablePath;  7  8 //启动程序  9  currentClientProcess.Kill(); 10 newClient.Start();