实例介绍
【实例简介】c# 读取分辨率并 拖动设置分辨率功能
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; //Download by http://www.codefans.net namespace 设置屏幕分辨率 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } public const uint WM_SYSCOMMAND = 0x0112; public const uint SC_MONITORPOWER = 0xF170; [DllImport("user32")] public static extern IntPtr SendMessage(IntPtr hWnd, uint wMsg, uint wParam, int lParam); public enum DMDO { DEFAULT = 0, D90 = 1, D180 = 2, D270 = 3 } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] struct DEVMODE { public const int DM_DISPLAYFREQUENCY = 0x400000; public const int DM_PELSWIDTH = 0x80000; public const int DM_PELSHEIGHT = 0x100000; public const int DM_BITSPERPEL = 262144; private const int CCHDEVICENAME = 32; private const int CCHFORMNAME = 32; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)] public string dmDeviceName; public short dmSpecVersion; public short dmDriverVersion; public short dmSize; public short dmDriverExtra; public int dmFields; public int dmPositionX; public int dmPositionY; public DMDO dmDisplayOrientation; public int dmDisplayFixedOutput; public short dmColor; public short dmDuplex; public short dmYResolution; public short dmTTOption; public short dmCollate; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHFORMNAME)] public string dmFormName; public short dmLogPixels; public int dmBitsPerPel; public int dmPelsWidth; public int dmPelsHeight; public int dmDisplayFlags; public int dmDisplayFrequency; public int dmICMMethod; public int dmICMIntent; public int dmMediaType; public int dmDitherType; public int dmReserved1; public int dmReserved2; public int dmPanningWidth; public int dmPanningHeight; } [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern int ChangeDisplaySettings([In] ref DEVMODE lpDevMode, int dwFlags); int dWidth = 0; int dHeight = 0; private void GetDis()//获取分辨率 { Size s = SystemInformation.PrimaryMonitorSize; dWidth = s.Width; dHeight = s.Height; lblDisInfo.Text = dWidth.ToString() " × " dHeight.ToString() " 像素"; } private void Form1_Load(object sender, EventArgs e) { GetDis(); ChangeDis(1); } private void ChangeDis(int i)//变换分辨率 { int dValue; dValue = trackBar1.Value; if (i == 0) { switch (dValue) { case 0: dWidth = 800; dHeight = 600; break; case 1: dWidth = 1024; dHeight = 768; break; case 2: dWidth = 1152; dHeight = 864; break; case 3: dWidth = 1280; dHeight = 600; break; case 4: dWidth = 1280; dHeight = 720; break; case 5: dWidth = 1280; dHeight = 768; break; case 6: dWidth = 1280; dHeight = 760; break; case 7: dWidth = 1280; dHeight = 1024; break; case 8: dWidth = 1400; dHeight = 1050; break; case 9: dWidth = 1600; dHeight = 900; break; case 10: dWidth = 1600; dHeight = 1200; break; } lblDisInfo.Text = dWidth.ToString() " × " dHeight.ToString() " 像素"; } else { int dSum = dWidth dHeight; switch (dSum) { case 1400: trackBar1.Value = 0; break; case 1792: trackBar1.Value = 1; break; case 2016: trackBar1.Value = 2; break; case 1880: trackBar1.Value = 3; break; case 2000: trackBar1.Value = 4; break; case 2048: trackBar1.Value = 5; break; case 2240: trackBar1.Value = 6; break; case 2304: trackBar1.Value = 7; break; case 2450: trackBar1.Value = 8; break; case 2500: trackBar1.Value = 9; break; case 2800: trackBar1.Value = 10; break; } } } private void trackBar1_Scroll(object sender, EventArgs e) { ChangeDis(0); } private void button1_Click(object sender, EventArgs e) { long RetVal = 0; DEVMODE dm = new DEVMODE(); dm.dmSize = (short)Marshal.SizeOf(typeof(DEVMODE)); dm.dmPelsWidth = dWidth;//宽 dm.dmPelsHeight = dHeight;//高 dm.dmDisplayFrequency = 85;//刷新率 dm.dmFields = DEVMODE.DM_PELSWIDTH | DEVMODE.DM_PELSHEIGHT | DEVMODE.DM_DISPLAYFREQUENCY | DEVMODE.DM_BITSPERPEL; RetVal = ChangeDisplaySettings(ref dm, 0); } } }
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