C#窗体程序实现全屏及取消全屏步骤

这篇文章主要介绍了C#窗体程序实现全屏及取消全屏步骤，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
由于项目需要，需要用vs窗体程序实现播放视频的窗口的全屏和取消全屏。

具体实现界面如图：

这是初始状态，视频框的右上角就是控制全屏的按钮

这是全屏后的状态，此时全屏按钮变成了取消全屏的样式

注：为了界面的美观我的全屏并没有把左边的那些控件也盖住，但是是可以设置的，下边代码部分我会进行讲解。

1、首先说明一下我所用的控件及我的项目中控件的名称，以便大家理解。

显示视频的黑框是一个picturebox即代码中的VideoPlayWnd，全屏/取消全屏是一个button即代码中的button4

2、具体代码如下：

全屏和取消全屏是一个按钮即button4

private Int16 zoom = -1;//用来控制点击此button4的时候，是需要全屏还是取消全屏//视频窗口的缩放代码private void button4_Click(object sender, EventArgs e){if(zoom<0){float w = this.Width - 210; //为了保证左边的控件不被挡上减了一个210float h = this.Height - 50;//为了底下的按钮不被挡上，因为还要用到，因此减了50this.VideoPlayWnd.Size = Size.Ceiling(new SizeF(w, h));//重新部署视频框即这个picturebox空间的长宽VideoPlayWnd.Location = new System.Drawing.Point(210, 0);//视频框的左上角坐标，会发现与我上边减去的210一致（大家肯定都理解为什么我就不说了）button4.Location = new System.Drawing.Point(795, 0);//不能只有picturebox变了，这个button的位置也要保证和视频框同步，所以需要重设坐标// button4.BackgroundImage = Image.FromFile(@"E:\lwj\addpersoninfo\addpersoninfo\Resources\退出全屏.png");//绝对路径（这是我测试的时候用的）button4.BackgroundImage = Image.FromFile(AppDomain.CurrentDomain.BaseDirectory + @"退出全屏.png");//AppDomain.CurrentDomain.BaseDirectory语句可以获取到你当前项目的bin目录，所以需要把图片放到对应目录下zoom = 1;//全屏之后，再点击需要取消全屏，因此要改变zoom的值}else{ //以下为取消全屏，即还原自己的视频框和按钮，具体操作类似全屏，就不细致注释了VideoPlayWnd.Location = new System.Drawing.Point(495, 360);this.VideoPlayWnd.Size = Size.Ceiling(new SizeF(323, 271));button4.Location = new System.Drawing.Point(795, 360);button4.BackgroundImage = Image.FromFile(AppDomain.CurrentDomain.BaseDirectory + @"全屏.png");zoom = -1;//取消全屏后再点击就要进行全屏，因此继续设为-1（保证小于0，以满足全屏操作的if条件）}}

以上代码中的按钮是给它加了一个全屏样式的背景图片，并在点击时切换背景图片。

补充知识：C# 窗体视频控件进入全屏模式和退出全屏模式

窗体控件进入全c#教程屏模式和退出全屏模式，视频播放的时候用到此功能。

工具类代码


using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace CvNetVideo.Play
{class FullScreenHelper{bool m_bFullScreen = false;IntPtr m_OldWndParent = IntPtr.Zero;WINDOWPLACEMENT m_OldWndPlacement = new WINDOWPLACEMENT();Control m_control = null;public FullScreenHelper(Control c){m_control = c;}struct POINT{int x;int y;};struct RECT{public int left;public int top;public int right;public int bottom;};//锁定指定窗口，禁止它更新。同时只能有一个窗口处于锁定状态。锁定指定窗口，禁止它更新。同时只能有一个窗口处于锁定状态[DllImport("User32.dll")]public static extern bool LockWindowUpdate(IntPtr hWndLock);//函数来设置弹出式窗口，层叠窗口或子窗口的父窗口。新的窗口与窗口必须属于同一应用程序[DllImport("User32.dll")]public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);//函数设置指定窗口的显示状态和恢复，最大化，最小化位置。函数功能： 函及原型 [DllImport("User32.dll")]public static extern bool SetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);//函数将创建指定窗口的线程设置到前台，并且激活该窗口。键盘输入转向该窗口，并为用户改各种可视的记号[DllImport("User32.dll")]public static extern bool SetForegroundWindow(IntPtr hWnd);//该函数返回桌面窗口的句柄。桌面窗口覆盖整个屏幕。桌面窗口是一个要在其上绘制所有的图标和其他窗口的区域[DllImport("User32.dll")]public static extern IntPtr GetDesktopWindow();//函数名。该函数返回指定窗口的显示状态以及被恢复的、最大化的和最小化的窗口位置[DllImport("User32.dll")]public static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);//是用于得到被定义的系统数据或者系统配置信息的一个专有名词 [DllImport("User32.dll")]public static extern int GetSystemMetrics(int nIndex); [DllImport("user32.dll", EntryPoint = "GetParent", SetLastError = true)]public static extern IntPtr GetParent(IntPtr hWnd);[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int Width, int Height, int flags);[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern System.IntPtr GetForegroundWindow();[DllImport("user32")]public static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);[DllImport("user32.dll")]public static extern uint ScreenToClient(IntPtr hwnd, ref POINT p);public void FullScreen(bool flag){m_bFullScreen = flag;if (!m_bFullScreen){LockWindowUpdate(m_control.Handle);SetParent(m_control.Handle, m_OldWndParent);SetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);SetForegroundWindow(m_OldWndParent);LockWindowUpdate(IntPtr.Zero);}else{GetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);int nScreenWidth = GetSystemMetrics(0);int nScreenHeight = GetSystemMetrics(1);m_OldWndParent = GetParent(m_control.Parent.Handle);SetParent(m_control.Handle, GetDesktopWindow());WINDOWPLACEMENT wp1 = new WINDOWPLACEMENT();wp1.length = (uint)Marshal.SizeOf(wp1);wp1.showCmd = 1;wp1.rcNormalPosition.left = 0;wp1.rcNormalPosition.top = 0;wp1.rcNormalPosition.right = nScreenWidth;wp1.rcNormalPosition.bottom = nScreenHeight;SetWindowPlacement(m_control.Handle, ref wp1);SetForegroundWindow(GetDesktopWindow());SetForegroundWindow(m_control.Handle);}m_bFullScreen = !m_bFullScreen;}struct WINDOWPLACEMENT{public uint length;public uint flags;public uint showCmd;public POINT ptMinPosition;public POINT ptMaxPosition;public RECT rcNormalPosition;};}
}

调用方式
///
/// 全屏事件

 /// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void UCVideo_DoubleClick(object sender, EventArgs e){//全屏设置//sdlVideo.SDL_MaximizeWindow();fullScreenHelper = new CvNetVideo.Play.FullScreenHelper(this);fullScreenHelper.FullScreen(true);Console.WriteLine("Entrance FullScreen Mode");}/// <summary>/// 按键弹起事件/// </summary>private void UCVideo_KeyUp(object sender, KeyEventArgs e){// ESC 退出全屏if (e.KeyCode == Keys.Escape&& fullScreenHelper!=null){fullScreenHelper.FullScreen(false);fullScreenHelper = null;Console.WriteLine("Exit FullScreen Mode");}   }

测试效果图

注意：在使用SDL的全屏操作过程中设置是无效的，播放视频过程中不能实现修改。代码如下：

public void SDL_MaximizeWindow(){Console.WriteLine("设置全屏");SDL.SDL_MaximizeWindow(screen);SDL.SDL_SetWindowFullscreen(screen, SDL.SDL_GetWindowFlags(screen));SDL.SDL_ShowWindow(screen);//int width, height;获取最大窗口值//SDL2.SDL.SDL_GetWindowMaximumSize(screen, out width, out height);设置最大窗口值//if (width>0&&height>0)//{// SDL2.SDL.SDL_SetWindowMaximumSize(screen, width, height);// Console.WriteLine("设置全屏......成功!width=" + width + ",height=" + height);//}//else//{// Console.WriteLine("设置全屏......失败!width=" + width + ",height=" + height);// SDL2.SDL.SDL_SetWindowMaximumSize(screen, w, h);//}}

工具代码功能改进

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace CvNetVideo.Play
{/// <summary>/// 定义全屏抽象类/// </summary>public abstract class FullScreenObject{public abstract void FullScreen(bool flag);}/// <summary>/// 桌面全屏/// </summary>public unsafe class FullScreenHelper: FullScreenObject{bool m_bFullScreen = false;WINDOWPLACEMENT m_OldWndPlacement = new WINDOWPLACEMENT();UCVideo m_control = null;public FullScreenHelper(UCVideo control){m_control = control;}private IntPtr m_OldWndParent = IntPtr.Zero;DockStyle old_docker_style;int old_left;int old_width;int old_height;int old_top;public override void FullScreen(bool flag){m_bFullScreen = flag;if (!m_bFullScreen){#region 方式一：窗体容积改变时不能全屏，未能解决IE全屏显示不全问题//ShellSDK.LockWindowUpdate(m_control.Handle);//ShellSDK.SetParent(m_control.Handle, m_OldWndParent);//ShellSDK.SetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);//ShellSDK.SetForegroundWindow(m_OldWndParent);//ShellSDK.LockWindowUpdate(IntPtr.Zero);#endregion#region 方式二：在容器改变时可以实现全屏，未能解决IE全屏显示不全问题// 取消全屏设置m_control.Dock = old_docker_style;m_control.Left = old_left;m_control.Top = old_top;m_control.Width = old_width;m_control.Height = old_height;ShellSDK.SetParent(m_control.Handle, m_OldWndParent);#endregion}else{#region 方式一：窗体容积改变时不能全屏，未能解决IE全屏显示不全问题//ShellSDK.GetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);//int nScreenWidth = ShellSDK.GetSystemMetrics(0);//int nScreenHeight = ShellSDK.GetSystemMetrics(1);//m_OldWndParent = ShellSDK.GetParent(m_control.Handle);//ShellSDK.SetParent(m_control.Handle, ShellSDK.GetDesktopWindow());//WINDOWPLACEMENT wp1 = new WINDOWPLACEMENT();//wp1.length = (uint)Marshal.SizeOf(wp1);//wp1.showCmd = 1;//wp1.rcNormalPosition.left = 0;//wp1.rcNormalPosition.top = 0;//wp1.rcNormalPosition.right = Screen.PrimaryScreen.Bounds.Width/*nScreenWidth*/;//wp1.rcNormalPosition.bottom = Screen.PrimaryScreen.WorkingArea.Height/* nScreenHeight*/;//ShellSDK.SetWindowPlacement(m_control.Handle, ref wp1);//ShellSDK.SetForegroundWindow(ShellSDK.GetDesktopWindow());//ShellSDK.SetForegroundWindow(m_control.Handle);#endregion#region 方式二：在容器改变时可以实现全屏，未能解决IE全屏显示不全问题// 记录原来的数据old_docker_style = m_control.Dock;old_left = m_control.Left;old_width = m_control.Width;old_height = m_control.Height;old_top = m_control.Top;m_OldWndParent = ShellSDK.GetParent(m_control.Handle);// 设置全屏数据int nScreenWidth = ShellSDK.GetSystemMetrics(0);int nScreenHeight = ShellSDK.GetSystemMetrics(1);m_control.Dock = DockStyle.None;m_control.Left = 0;m_control.Top = 0;m_control.Width = nScreenWidth;m_control.Height = nScreenHeight;ShellSDK.SetParent(m_control.Handle, ShellSDK.GetDesktopWindow());ShellSDK.SetWindowPos(m_control.Handle, -1, 0, 0, m_control.Right - m_control.Left, m_control.Bottom - m_control.Top, 0);#endregion}m_bFullScreen = !m_bFullScreen;}}/// <summary>/// 在容器内部全屏/// </summary>public class FullScreenInContainerHelper : FullScreenObject{bool m_bFullScreen = false;Control m_control = null;public FullScreenInContainerHelper(Control control){m_control = control;}private IntPtr m_OldWndParent = IntPtr.Zero;private IntPtr m_father_hwnd;private RECT m_rect = new RECT();public override void FullScreen(bool flag){m_bFullScreen = flag;if (!m_bFullScreen){ShellSDK.SetParent(m_control.Handle, m_father_hwnd);ShellSDK.SetWindowPos(m_control.Handle, 0, m_rect.left, m_rect.top, m_rect.right - m_rect.left, m_rect.bottom - m_rect.top, 0);ShellSDK.SetForegroundWindow(m_father_hwnd);}else{m_father_hwnd = ShellSDK.GetParent(m_control.Handle);ShellSDK.GetWindowRect(m_control.Handle, out RECT rect);POINT pt = new POINT();pt.x = rect.left;pt.y = rect.top;ShellSDK.ScreenToClient(m_father_hwnd, ref pt);rect.right = rect.right - rect.left + pt.x;rect.bottom = rect.bottom - rect.top + pt.y;rect.left = pt.x;rect.top = pt.y;m_rect = rect;ShellSDK.GetWindowRect(m_father_hwnd, out RECT rect_fature);ShellSDK.SetWindowPos(m_control.Handle, 0, 0, 0, rect_fature.right - rect_fature.left, rect_fature.bottom - rect_fature.top, 0);}m_bFullScreen = !m_bFullScreen;}}/// <summary>/// Windows系统API-SDK/// </summary>public class ShellSDK{//锁定指定窗口，禁止它更新。同时只能有一个窗口处于锁定状态。锁定指定窗口，禁止它更新。同时只能有一个窗口处于锁定状态[DllImport("User32.dll")]public static extern bool LockWindowUpdate(IntPtr hWndLock);//函数来设置弹出式窗口，层叠窗口或子窗口的父窗口。新的窗口与窗口必须属于同一应用程序[DllImport("User32.dll")]public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);//函数设置指定窗口的显示状态和恢复，最大化，最小化位置。函数功能： 函及原型 [DllImport("User32.dll")]public static extern bool SetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);//函数将创建指定窗口的线程设置到前台，并且激活该窗口。键盘输入转向该窗口，并为用户改各种可视的记号[DllImport("User32.dll")]public static extern bool SetForegroundWindow(IntPtr hWnd);//该函数返回桌面窗口的句柄。桌面窗口覆盖整个屏幕。桌面窗口是一个要在其上绘制所有的图标和其他窗口的区域[DllImport("User32.dll")]public static extern IntPtr GetDesktopWindow();//函数名。该函数返回指定窗口的显示状态以及被恢复的、最大化的和最小化的窗口位置[DllImport("User32.dll")]public static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);//是用于得到被定义的系统数据或者系统配置信息的一个专有名词 [DllImport("User32.dll")]public static extern int GetSystemMetrics(int nIndex); [DllImport("user32.dll", EntryPoint = "GetParent", SetLastError = true)]public static extern IntPtr GetParent(IntPtr hWnd);[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int Width, int Height, int flags);[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern System.IntPtr GetForegroundWindow();[DllImport("user32")]public static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);[DllImport("user32.dll")]public static extern uint ScreenToClient(IntPtr hwnd, ref POINT p);}/// <summary>/// 图像区域对象/// </summary>public struct RECT{public int left;public int top;public int right;public int bottom;}/// <summary>/// 图像点位位置/// </summary>public struct POINT{public int x;public int y;}/// <summary>/// 图像窗口对象/// </summary>public struct WINDOWPLACEMENT{public uint length;public uint flags;public uint showCmd;public POINT ptMinPosition;public POINT ptMaxPosition;public RECT rcNormalPosition;}
}

以上这篇C#窗体程序实现全屏及python基础教程取消全屏步骤就是

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