最近有朋友让我给他弄个应用程序全屏的功能，例如银行的取号程序界面。所以我从网上查询了一些实现的方法。
C#应用程序中如何实现全屏幕显示功能？
效果就像windows自带的屏幕保护程序和众多的游戏那样，无论是否设置了“将任务栏保持在其他窗口的前端”都不显示任务栏
实现方式一
在网上找来一些简单的实现方式：
?| 12 | this.FormBorderStyle = FormBorderStyle.None; //设置窗体为无边框样式this.WindowState = FormWindowState.Maximized; //最大化窗体 |
然后再设置窗体的位置和大小，例如：Width=1024 Height=768 Left=0 Top=0等size的值
把以上两句代码直接放到Form1_Load的方法中，就可以了，比较简单，我就不贴代码了。
实现方式二
调用系统的API函数，如user32.dll中的FindWindow和ShowWindow函数，具体代码如下：
?| 12345 | [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); |
代码如下：
?| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102 | using System;using System.Windows.Forms;using System.Drawing;using System.Runtime.InteropServices;namespace FullScr{public partial class Form1 : Form{Boolean m_IsFullScreen = false;//标记是否全屏public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}/// <summary>/// 全屏按钮的Click事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){m_IsFullScreen = !m_IsFullScreen;//点一次全屏，再点还原。 this.SuspendLayout();if (m_IsFullScreen)//全屏 ,按特定的顺序执行{SetFormFullScreen(m_IsFullScreen);this.FormBorderStyle = FormBorderStyle.None;this.WindowState = FormWindowState.Maximized;this.Activate();//}else//还原，按特定的顺序执行——窗体状态，窗体边框，设置任务栏和工作区域{this.WindowState = FormWindowState.Normal;this.FormBorderStyle = FormBorderStyle.Sizable;SetFormFullScreen(m_IsFullScreen);this.Activate();}this.ResumeLayout(false);}/// <summary> /// 设置全屏或这取消全屏 /// </summary> /// <param name="fullscreen">true:全屏 false:恢复</param> /// <param name="rectOld">设置的时候，此参数返回原始尺寸，恢复时用此参数设置恢复</param> /// <returns>设置结果</returns> public Boolean SetFormFullScreen(Boolean fullscreen)//, ref Rectangle rectOld{Rectangle rectOld = Rectangle.Empty;Int32 hwnd = 0;hwnd = FindWindow("Shell_TrayWnd", null);//获取任务栏的句柄if (hwnd == 0) return false;if (fullscreen)//全屏{ShowWindow(hwnd, SW_HIDE);//隐藏任务栏SystemParametersInfo(SPI_GETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//get屏幕范围Rectangle rectFull = Screen.PrimaryScreen.Bounds;//全屏范围SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectFull, SPIF_UPDATEINIFILE);//窗体全屏幕显示}else//还原 {ShowWindow(hwnd, SW_SHOW);//显示任务栏SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//窗体还原}return true;}#region user32.dllpublic 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}} |
完善后的代码：
非常感谢@iheartwater的热心帮助，更改后的代码能够解决”全屏后，窗体能够恢复到原来的状态，包括位置（Loaction）和大小（Size）“，唉，其实，原因还挺简单的。
?| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105 | Modified Codepublic partial class FrmFullScreen : Form{Boolean m_IsFullScreen = false;//标记是否全屏public FrmFullScreen(){InitializeComponent();}/// <summary>/// 全屏按钮的Click事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnFullScreen_Click(object sender, EventArgs e){m_IsFullScreen = !m_IsFullScreen;//点一次全屏，再点还原。 this.SuspendLayout();if (m_IsFullScreen)//全屏 ,按特定的顺序执行{SetFormFullScreen(m_IsFullScreen);this.FormBorderStyle = FormBorderStyle.None;this.WindowState = FormWindowState.Maximized;this.Activate();//}else//还原，按特定的顺序执行——窗体状态，窗体边框，设置任务栏和工作区域{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相当于单机按钮；Esc健，如果全屏则退出全屏/// </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键盘退出全屏{if (m_IsFullScreen){e.Handled = true;this.WindowState = FormWindowState.Normal;//还原 this.FormBorderStyle = FormBorderStyle.Sizable;SetFormFullScreen(false);}}}/// <summary> /// 设置全屏或这取消全屏 /// </summary> /// <param name="fullscreen">true:全屏 false:恢复</param> /// <param name="rectOld">设置的时候，此参数返回原始尺寸，恢复时用此参数设置恢复</param> /// <returns>设置结果</returns> public Boolean SetFormFullScreen(Boolean fullscreen)//, ref Rectangle rectOld{Rectangle rectOld=Rectangle.Empty;Int32 hwnd = 0;hwnd = FindWindow("Shell_TrayWnd", null);//获取任务栏的句柄if (hwnd == 0) return false;if (fullscreen)//全屏{ShowWindow(hwnd, SW_HIDE);//隐藏任务栏SystemParametersInfo(SPI_GETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//get 屏幕范围Rectangle rectFull = Screen.PrimaryScreen.Bounds;//全屏范围SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectFull, SPIF_UPDATEINIFILE);//窗体全屏幕显示}else//还原 {ShowWindow(hwnd, SW_SHOW);//显示任务栏SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectOld, SPIF_UPDATEINIFILE);//窗体还原}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} |
窗体全屏
窗体全屏的方法：
隐藏任务栏、设置工作区域
窗体最大化、设置窗体边框样式
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