C#窗體全屏功能實例代碼
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(xiàn)的方法。
C#應用程序中如何實現(xiàn)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(xiàn)方式一
在網上找來一些簡單的實現(xiàn)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(xiàn)方式二
調用系統(tǒng)的API函數(shù),如user32.dll中的FindWindow和ShowWindow函數(shù),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(zhí)行
{
SetFormFullScreen(m_IsFullScreen);
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;
this.Activate();//
}
else//還原,按特定的順序執(zhí)行——窗體狀態(tài),窗體邊框,設置任務欄和工作區(qū)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(shù)返回原始尺寸,恢復時用此參數(shù)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(tài),包括位置(Loaction)和大?。⊿ize)“,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(zhí)行
{
SetFormFullScreen(m_IsFullScreen);
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;
this.Activate();//
}
else//還原,按特定的順序執(zhí)行——窗體狀態(tài),窗體邊框,設置任務欄和工作區(qū)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,F(xiàn)11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(shù)返回原始尺寸,恢復時用此參數(shù)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(qū)域
窗體最大化、設置窗體邊框樣式
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