Re: [問題] process.start 外部程式視窗焦點

看板C_Sharp (C#)作者TeemingVoid (TeemingVoid)時間12年前 (2013/07/29 00:30)推噓3(3推 0噓 19→)

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※ 引述《yeahhey (神秘人)》之銘言： : 大家好 : 小弟最近在用process.StartInfo來啟動外部程式 : 功能上想要達到 : buttom_click後，可以依序把多個外部程式啟動完(利用來處理資料的外部程式) : (例如:先A，A結束後再B，B結束在C...) : 這些執行序的視窗，目前程式都設定縮到最小 : 現在問題是 : ... 一開始其實看不懂你在寫什麼 :p (抱歉)，後來才發現原來是指 A 程式結束後，接下來要啟動 B 程式時，最前景視窗會失去視窗焦點(focus)。請這樣試試看合不合你的需要: 1. 新建一個 Windows Form 專案，名稱(例如)叫: StartOneByOne 2. 在 Form1 擺一個 Button，Button1 滑鼠點兩下，準備寫 Click 事件。 3. using 以下 namespace: using System.Diagnostics; using System.Runtime.InteropServices; 4. 在 Click 事件前，貼入下列 Windows API 宣告: [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow); enum ShowWindowCommands : int { /// <summary> /// Hides the window and activates another window. /// </summary> Hide = 0, /// <summary> /// Activates and displays a window. If the window is minimized or /// maximized, the system restores it to its original size and position. /// An application should specify this flag when displaying the window /// for the first time. /// </summary> Normal = 1, /// <summary> /// Activates the window and displays it as a minimized window. /// </summary> ShowMinimized = 2, /// <summary> /// Maximizes the specified window. /// </summary> Maximize = 3, // is this the right value? /// <summary> /// Activates the window and displays it as a maximized window. /// </summary> ShowMaximized = 3, /// <summary> /// Displays a window in its most recent size and position. This value /// is similar to <see cref="Win32.ShowWindowCommand.Normal"/>, except /// the window is not activated. /// </summary> ShowNoActivate = 4, /// <summary> /// Activates the window and displays it in its current size and /// position. /// </summary> Show = 5, /// <summary> /// Minimizes the specified window and activates the next top-level /// window in the Z order. /// </summary> Minimize = 6, /// <summary> /// Displays the window as a minimized window. This value is similar to /// <see cref="Win32.ShowWindowCommand.ShowMinimized"/>, except the /// window is not activated. /// </summary> ShowMinNoActive = 7, /// <summary> /// Displays the window in its current size and position. This value is /// similar to <see cref="Win32.ShowWindowCommand.Show"/>, except the /// window is not activated. /// </summary> ShowNA = 8, /// <summary> /// Activates and displays the window. If the window is minimized or /// maximized, the system restores it to its original size and position. /// An application should specify this flag when restoring a minimized /// window. /// </summary> Restore = 9, /// <summary> /// Sets the show state based on the SW_* value specified in the /// STARTUPINFO structure passed to the CreateProcess function by the /// program that started the application. /// </summary> ShowDefault = 10, /// <summary> /// <b>Windows 2000/XP:</b> Minimizes a window, even if the thread /// that owns the window is not responding. This flag should only be /// used when minimizing windows from a different thread. /// </summary> ForceMinimize = 11 } 5. 按鈕的 Click 事件處理函式則類似這樣: private void button1_Click(object sender, EventArgs e) { // testLab.exe 是我另外寫的測試程式，它五秒後會自動結束 string[] Programs = new string[] { @"c:\temp\testLab.exe", @"notepad.exe" }; foreach (string sProgram in Programs) { ProcessStartInfo psi = new ProcessStartInfo(sProgram); // 一開始是極小化 psi.WindowStyle = ProcessWindowStyle.Minimized; Process p = Process.Start(psi); // 等待程式確實 run 起來... while (p.MainWindowHandle == IntPtr.Zero) { System.Threading.Thread.Sleep(100); p.Refresh(); } // 測試後，發現主視窗也要極小化。 ShowWindow(this.Handle, ShowWindowCommands.Minimize); // 隱藏工作視窗，這樣 focus 自然釋出 ShowWindow(p.MainWindowHandle, ShowWindowCommands.Hide); // 重新將工作視窗設為極小化 ShowWindow(p.MainWindowHandle, ShowWindowCommands.Minimize); // p.WaitForExit(); while (!p.HasExited) { System.Threading.Thread.Sleep(100); Application.DoEvents(); } } } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.170.128.145

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Re: [問題] process.start 外部程式 視窗焦點

Re: [問題] process.start 外部程式視窗焦點