C # Operations window through process name/process ID

1. Determine if the window exists

1     Private BOOLiswindowexist (IntPtr handle)2     {3         return(! (GetWindow (NewHandleRef ( This, handle),4)! = IntPtr.Zero) && iswindowvisible (NewHandleRef ( This, handle)));4     }5 6[DllImport ("user32.dll", CharSet = CharSet.Auto, exactspelling =true)]7      Public Static externIntPtr GetWindow (HandleRef hWnd,intucmd);8 9[DllImport ("user32.dll", CharSet =CharSet.Auto)]Ten      Public Static extern BOOLIsWindowVisible (HandleRef hWnd);

2. Get the Window handle

1     /// <summary>2     ///get application window handle3     /// </summary>4     /// <param name= "ProcessId" ></param>5     /// <returns></returns>6     PrivateIntPtr Getwindowhandle (intprocessId)7     {8         varWindowHandle =IntPtr.Zero;9Enumthreadwindowscallback Windowscallback =NewEnumthreadwindowscallback (FindMainWindow);Ten EnumWindows (Windowscallback, IntPtr.Zero); One         //Keep the Loop A GC. KeepAlive (windowscallback); -  -         BOOLFindMainWindow (IntPtr handle, IntPtr extraparameter) the         { -             intnum; -GetWindowThreadProcessId (NewHandleRef ( This, handle), outnum); -             if(num = = ProcessId &&iswindowexist (handle)) +             { -WindowHandle =handle; +                 return true; A             } at             return false; -         } -  -         returnWindowHandle; -     } -      Public Delegate BOOLEnumthreadwindowscallback (IntPtr hWnd, IntPtr lParam); in  -[DllImport ("user32.dll", CharSet = CharSet.Auto, SetLastError =true)] to      Public Static extern BOOLEnumWindows (Enumthreadwindowscallback callback, IntPtr extradata); +  -[DllImport ("user32.dll", CharSet = CharSet.Auto, SetLastError =true)] the      Public Static extern intGetWindowThreadProcessId (HandleRef handle, out intPROCESSID);

3. Close the application window

Close the app window based on the process ID:

1     /// <summary>2     ///Close Program main window3     /// </summary>4     /// <param name= "ProcessId" >Process ID</param>5      Public voidCloseWindow (intprocessId)6     {7         varMWH =Getwindowhandle (processId);8SendMessage (MWh, Mw_close,0,0);9     }Ten     Const intMw_close =0x0010; One  A[DllImport ("User32.dll", EntryPoint ="SendMessage")] -     Private Static extern intSendMessage (IntPtr hWnd,intMSG,intWParam,intLParam);

Close all windows for this process name:

1          Public voidCloseallwindows (stringprocessName)2         {3process[] Processlist =Process.getprocessesbyname (processName);4             foreach(Process processinchprocesslist)5             {6 CloseMainWindow (process. ID);7             }8}

Of course, the direct kill process is the quickest way:

1     /// <summary>2     ///Close All Processes3     /// </summary>4     /// <param name= "ProcessName" ></param>5     /// <returns></returns>6      Public Static BOOLCloseallprocesses (stringprocessName)7     {8         Try9         {Tenprocess[] Pseainotes =Process.getprocessesbyname (processName); One             foreach(Process Pseainoteinchpseainotes) A             { - Pseainote.kill (); -             } the         } -         Catch -         { -             return false; +         } -  +         return true; A}

4. Restart the program

1     stringAppfilename =CurrentClientProcess.MainModule.FileName;2 3Process newclient =NewProcess ();4NewClient.StartInfo.FileName =Appfilename;5     //set the initial directory of the process to start6NewClient.StartInfo.WorkingDirectory =System.Windows.Forms.Application.ExecutablePath;7     8     //Start the program9 Currentclientprocess.kill ();TenNewclient.start ();

Processing of sending/receiving messages between windows, refer to C # cross-process communication

C # Operations window through process name/process ID