如何使用 Visual C# 收集和更改屏幕分辨率?
7 回答
为了检索屏幕分辨率,您将需要使用System.Windows.Forms.Screen
该类。该Screen.AllScreens
属性可用于访问系统上所有显示的集合,或者您可以使用该Screen.PrimaryScreen
属性访问主显示。
该类Screen
有一个名为 的属性Bounds
,您可以使用它来确定该类当前实例的分辨率。例如,要确定当前屏幕的分辨率:
Rectangle resolution = Screen.PrimaryScreen.Bounds;
此代码将在 WPF 中完美运行。您可以在页面加载或按钮单击中使用它。
string screenWidth =System.Windows.SystemParameters.PrimaryScreenWidth.ToString();
string screenHeight = System.Windows.SystemParameters.PrimaryScreenHeight.ToString();
txtResolution.Text ="Resolution : "+screenWidth + " X " + screenHeight;
在 C# 中,这是获取分辨率屏幕的方法:
按钮单击或表单加载:
string screenWidth = Screen.PrimaryScreen.Bounds.Width.ToString();
string screenHeight = Screen.PrimaryScreen.Bounds.Height.ToString();
Label1.Text = ("Resolution: " + screenWidth + "x" + screenHeight);
在 Winforms 中,有一个 Screen 类可用于获取有关连接到计算机的所有显示器的屏幕尺寸和颜色深度的数据。这是文档页面:http: //msdn.microsoft.com/en-us/library/system.windows.forms.screen.aspx
更改屏幕分辨率比较棘手。有一个 Resolution 第三方类,它包装了您本来要挂钩的本机代码。使用其 CResolution 嵌套类将屏幕分辨率设置为新的高度和宽度;但请理解,这样做仅适用于显示器实际支持的高度/宽度组合(800x600、1024x768 等,而不是 817x435)。
从不同的解决方案中回答以获得显示分辨率
获取比例因子
通过缩放因子结果获取 Screen.PrimaryScreen.Bounds.Width 和 Screen.PrimaryScreen.Bounds.Height 倍数
#region Display Resolution [DllImport("gdi32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)] public static extern int GetDeviceCaps(IntPtr hDC, int nIndex); public enum DeviceCap { VERTRES = 10, DESKTOPVERTRES = 117 } public static double GetWindowsScreenScalingFactor(bool percentage = true) { //Create Graphics object from the current windows handle Graphics GraphicsObject = Graphics.FromHwnd(IntPtr.Zero); //Get Handle to the device context associated with this Graphics object IntPtr DeviceContextHandle = GraphicsObject.GetHdc(); //Call GetDeviceCaps with the Handle to retrieve the Screen Height int LogicalScreenHeight = GetDeviceCaps(DeviceContextHandle, (int)DeviceCap.VERTRES); int PhysicalScreenHeight = GetDeviceCaps(DeviceContextHandle, (int)DeviceCap.DESKTOPVERTRES); //Divide the Screen Heights to get the scaling factor and round it to two decimals double ScreenScalingFactor = Math.Round(PhysicalScreenHeight / (double)LogicalScreenHeight, 2); //If requested as percentage - convert it if (percentage) { ScreenScalingFactor *= 100.0; } //Release the Handle and Dispose of the GraphicsObject object GraphicsObject.ReleaseHdc(DeviceContextHandle); GraphicsObject.Dispose(); //Return the Scaling Factor return ScreenScalingFactor; } public static Size GetDisplayResolution() { var sf = GetWindowsScreenScalingFactor(false); var screenWidth = Screen.PrimaryScreen.Bounds.Width * sf; var screenHeight = Screen.PrimaryScreen.Bounds.Height * sf; return new Size((int)screenWidth, (int)screenHeight); } #endregion
检查显示分辨率
var size = GetDisplayResolution();
Console.WriteLine("Display Resoluton: " + size.Width + "x" + size.Height);
如果要收集屏幕分辨率,可以在 WPF 窗口中运行以下代码(该窗口是this
指的):
System.Windows.Media.Matrix m = PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice;
Double dpiX = m.M11 * 96;
Double dpiY = m.M22 * 96;
我花了很多时间试图弄清楚这一点,对于具有缩放因子的设备来说,由于在调用 C# 对象时缩放因子有时为 125% 或 150%,因此很难获得屏幕的实际大小返回值现在不正确,因此您需要进行 Windows API 调用以获取缩放因子并应用乘数,我为非 WPF 应用程序找到的唯一工作方式是这里