C#窗体全屏功能实例代码

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:


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:


 [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:


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)
  {
  }

  /// 
  /// 全屏按钮的Click事件
  /// 
  /// 
  /// 
  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); } ///

/// 设置全屏或这取消全屏 /// /// true:全屏 false:恢复 /// 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 /// 设置结果 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 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。


Modified Code
 public partial class FrmFullScreen : Form
 {
  Boolean m_IsFullScreen = false;//标记是否全屏

  public FrmFullScreen()
  {
   InitializeComponent();
  }
  /// 
  /// 全屏按钮的Click事件
  /// 
  /// 
  /// 
  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); } ///

/// 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 /// /// /// 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); } } } /// /// 设置全屏或这取消全屏 /// /// true:全屏 false:恢复 /// 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 /// 设置结果 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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