最近有朋友讓我給他弄個應用程序全屏的功能，例如銀行的取號程序界面。所以我從網上查詢了一些實現的方法。
C#應用程序中如何實現全屏幕顯示功能？
效果就像windows自帶的屏幕保護程序和眾多的游戲那樣，無論是否設置了“將任務欄保持在其他窗口的前端”都不顯示任務欄
實現方式一
在網上找來一些簡單的實現方式：
this.FormBorderStyle = FormBorderStyle.None; //設置窗體為無邊框樣式this.WindowState = FormWindowState.Maximized; //最大化窗體
然后再設置窗體的位置和大小，例如：Width=1024 Height=768 Left=0 Top=0等size的值
把以上兩句代碼直接放到Form1_Load的方法中，就可以了，比較簡單，我就不貼代碼了。
實現方式二
調用系統的API函數，如user32.dll中的FindWindow和ShowWindow函數，具體代碼如下：
[DllImport("user32.dll", EntryPoint = "ShowWindow")] public static extern Int32 ShowWindow(Int32 hwnd, Int32 nCmdShow); [DllImport("user32.dll", EntryPoint = "FindWindow")] private static extern Int32 FindWindow(string lpClassName, string lpWindowName);代碼如下：
using System;using System.Windows.Forms;using System.Drawing;using System.Runtime.InteropServices;namespace FullScr{ public partial class Form1 : Form { Boolean m_IsFullScreen = false;//標記是否全屏 public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } /// <summary> /// 全屏按鈕的Click事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { m_IsFullScreen = !m_IsFullScreen;//點一次全屏，再點還原。 this.SuspendLayout(); if (m_IsFullScreen)//全屏 ,按特定的順序執行 { SetFormFullScreen(m_IsFullScreen); this.FormBorderStyle = FormBorderStyle.None; this.WindowState = FormWindowState.Maximized; this.Activate();// } else//還原，按特定的順序執行——窗體狀態，窗體邊框，設置任務欄和工作區域 { this.WindowState = FormWindowState.Normal; this.FormBorderStyle = FormBorderStyle.Sizable; SetFormFullScreen(m_IsFullScreen); this.Activate(); } this.ResumeLayout(false); } /// <summary> /// 設置全屏或這取消全屏 /// </summary> /// <param name="fullscreen">true:全屏 false:恢復</param> /// <param name="rectOld">設置的時候，此參數返回原始尺寸，恢復時用此參數設置恢復</param> /// <returns>設置結果</returns> public Boolean SetFormFullScreen(Boolean fullscreen)//, ref Rectangle rectOld { Rectangle rectOld = Rectangle.Empty; Int32 hwnd = 0; hwnd = FindWindow("Shell_TrayWnd", null);//獲取任務欄的句柄 if (hwnd == 0) return false; if (fullscreen)//全屏 { ShowWindow(hwnd, SW_HIDE);//隱藏任務欄 SystemParametersInfo(SPI_GETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//get屏幕范圍 Rectangle rectFull = Screen.PrimaryScreen.Bounds;//全屏范圍 SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectFull, SPIF_UPDATEINIFILE);//窗體全屏幕顯示 } else//還原 { ShowWindow(hwnd, SW_SHOW);//顯示任務欄 SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//窗體還原 } return true; } #region user32.dll public const Int32 SPIF_UPDATEINIFILE = 0x1; public const Int32 SPI_SETWORKAREA = 47; public const Int32 SPI_GETWORKAREA = 48; public const Int32 SW_SHOW = 5; public const Int32 SW_HIDE = 0; [DllImport("user32.dll", EntryPoint = "ShowWindow")] public static extern Int32 ShowWindow(Int32 hwnd, Int32 nCmdShow); [DllImport("user32.dll", EntryPoint = "FindWindow")] private static extern Int32 FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", EntryPoint = "SystemParametersInfo")] private static extern Int32 SystemParametersInfo(Int32 uAction, Int32 uParam, ref Rectangle lpvParam, Int32 fuWinIni); #endregion }}完善后的代碼：
非常感謝@iheartwater的熱心幫助，更改后的代碼能夠解決”全屏后，窗體能夠恢復到原來的狀態，包括位置（Loaction）和大小（Size）“，唉，其實，原因還挺簡單的。
Modified Code public partial class FrmFullScreen : Form { Boolean m_IsFullScreen = false;//標記是否全屏 public FrmFullScreen() { InitializeComponent(); } /// <summary> /// 全屏按鈕的Click事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnFullScreen_Click(object sender, EventArgs e) { m_IsFullScreen = !m_IsFullScreen;//點一次全屏，再點還原。 this.SuspendLayout(); if (m_IsFullScreen)//全屏 ,按特定的順序執行 { SetFormFullScreen(m_IsFullScreen); this.FormBorderStyle = FormBorderStyle.None; this.WindowState = FormWindowState.Maximized; this.Activate();// } else//還原，按特定的順序執行——窗體狀態，窗體邊框，設置任務欄和工作區域 { this.WindowState = FormWindowState.Normal; this.FormBorderStyle = FormBorderStyle.Sizable; SetFormFullScreen(m_IsFullScreen); this.Activate(); } this.ResumeLayout(false); } /// <summary> /// 全屏的快捷功能，F11相當于單機按鈕；Esc健，如果全屏則退出全屏 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnFullScreen_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.F11) { btnFullScreen.PerformClick(); e.Handled = true; } else if (e.KeyCode == Keys.Escape)//esc鍵盤退出全屏 { if (m_IsFullScreen) { e.Handled = true; this.WindowState = FormWindowState.Normal;//還原 this.FormBorderStyle = FormBorderStyle.Sizable; SetFormFullScreen(false); } } } /// <summary> /// 設置全屏或這取消全屏 /// </summary> /// <param name="fullscreen">true:全屏 false:恢復</param> /// <param name="rectOld">設置的時候，此參數返回原始尺寸，恢復時用此參數設置恢復</param> /// <returns>設置結果</returns> public Boolean SetFormFullScreen(Boolean fullscreen)//, ref Rectangle rectOld { Rectangle rectOld=Rectangle.Empty; Int32 hwnd = 0; hwnd = FindWindow("Shell_TrayWnd", null);//獲取任務欄的句柄 if (hwnd == 0) return false; if (fullscreen)//全屏 { ShowWindow(hwnd, SW_HIDE);//隱藏任務欄 SystemParametersInfo(SPI_GETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//get 屏幕范圍 Rectangle rectFull = Screen.PrimaryScreen.Bounds;//全屏范圍 SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectFull, SPIF_UPDATEINIFILE);//窗體全屏幕顯示 } else//還原 { ShowWindow(hwnd, SW_SHOW);//顯示任務欄 SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//窗體還原 } return true; } #region user32.dll [DllImport("user32.dll", EntryPoint = "ShowWindow")] public static extern Int32 ShowWindow(Int32 hwnd, Int32 nCmdShow); public const Int32 SW_SHOW = 5; public const Int32 SW_HIDE = 0; [DllImport("user32.dll", EntryPoint = "SystemParametersInfo")] private static extern Int32 SystemParametersInfo(Int32 uAction, Int32 uParam, ref Rectangle lpvParam, Int32 fuWinIni); public const Int32 SPIF_UPDATEINIFILE = 0x1; public const Int32 SPI_SETWORKAREA = 47; public const Int32 SPI_GETWORKAREA = 48; [DllImport("user32.dll", EntryPoint = "FindWindow")] private static extern Int32 FindWindow(string lpClassName, string lpWindowName); #endregion }窗體全屏
窗體全屏的方法：
隱藏任務欄、設置工作區域
窗體最大化、設置窗體邊框樣式
新聞熱點
疑難解答
