C# 通過進程名/進程Id 操作視窗

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1. 判斷視窗是否存在

 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. 擷取視窗控制代碼

 1     /// <summary> 2     /// 擷取應用程式視窗控制代碼 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         //保持迴圈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. 關閉應用視窗

根據進程Id關閉應用視窗：

 1     /// <summary> 2     /// 關閉程式主視窗 3     /// </summary> 4     /// <param name="processId">進程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);

關閉所有此進程名的視窗：

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         }

當然，直接殺進程，是最快的方法：

 1     /// <summary> 2     /// 關閉所有進程 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         catch17         {18             return false;19         }20 21         return true;22     }

4. 重啟程式

 1     string appFileName = currentClientProcess.MainModule.FileName; 2  3     Process newClient = new Process(); 4     newClient.StartInfo.FileName = appFileName; 5     // 設定要啟動的進程的初始目錄 6     newClient.StartInfo.WorkingDirectory = System.Windows.Forms.Application.ExecutablePath; 7      8     //啟動程式 9     currentClientProcess.Kill();10     newClient.Start();

 

視窗之間發送/接收訊息的處理，請參考《C# 跨進程通訊》 

 

C# 通過進程名/進程Id 操作視窗