在windows下要实现不同用户拥有不同分辨率,为什么不自己动手来实现呢,看看如下实例吧
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首先制作一个能改变屏幕分辨率的C#程序,源代码如下,使用了Visual C# Express 2005 BETA 1:
1、新建Windows Application工程,取名为ScreenResolution
2、粘贴各文件的代码:
Program.cs
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Using directives#region Using directives
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using System;
using System.Collections.Generic;
using System.Windows.Forms;
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#endregion
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namespace ScreenResolution
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{
static class Program
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{
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/**//// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
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{
Application.EnableVisualStyles();
Application.EnableRTLMirroring();
Application.Run(new Form1());
}
}
} Form1.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
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namespace ScreenResolution
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{
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partial class Form1 : System.Windows.Forms.Form
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{
public enum DMDO
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{
DEFAULT = 0,
D90 = 1,
D180 = 2,
D270 = 3
}
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
struct DEVMODE
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{
public const int DM_DISPLAYFREQUENCY = 0x400000;
public const int DM_PELSWIDTH = 0x80000;
public const int DM_PELSHEIGHT = 0x100000;
private const int CCHDEVICENAME = 32;
private const int CCHFORMNAME = 32;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)]
public string dmDeviceName;
public short dmSpecVersion;
public short dmDriverVersion;
public short dmSize;
public short dmDriverExtra;
public int dmFields;
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public int dmPositionX;
public int dmPositionY;
public DMDO dmDisplayOrientation;
public int dmDisplayFixedOutput;
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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;
}
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
//static extern int ChangeDisplaySettings( DEVMODE lpDevMode, int dwFlags);
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static extern int ChangeDisplaySettings([In] ref DEVMODE lpDevMode, int dwFlags);
//private System.ComponentModel.Container components = null;
public Form1()
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{
InitializeComponent();
}
// protected override void Dispose(bool disposing)
// {
// if (disposing)
// {
// if (components != null)
// {
// components.Dispose();
// }
// }
// base.Dispose(disposing);
// }
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Windows Form Designer generated code#region Windows Form Designer generated code
// private void InitializeComponent()
// {
// this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
// this.ClientSize = new System.Drawing.Size(292, 273);
// this.Text = "改变屏幕分辨率的例子";
//
// }
#endregion
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// static void Main()
// {
// Form1 r = new Form1();
// r.ChangeRes();
// Application.Run(new Form1());
// }
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void ChangeRes(int chMode)
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{
Form1 t = new Form1();
long RetVal = 0;
DEVMODE dm = new DEVMODE();
dm.dmSize = (short)Marshal.SizeOf(typeof(DEVMODE));
if (chMode == 1)
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{
dm.dmPelsWidth = 1600;
dm.dmPelsHeight = 1024;
dm.dmDisplayFrequency = 85;
}
else if (chMode == 2)
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{
dm.dmPelsWidth = 1024;
dm.dmPelsHeight = 768;
dm.dmDisplayFrequency = 85;
}
dm.dmFields = DEVMODE.DM_PELSWIDTH | DEVMODE.DM_PELSHEIGHT | DEVMODE.DM_DISPLAYFREQUENCY;
RetVal = ChangeDisplaySettings(ref dm, 0);
}
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private void Form1_Load(object sender, EventArgs e)
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{
ChangeRes(1);
}
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private void Form1_FormClosing(object sender, FormClosingEventArgs e)
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{
ChangeRes(2);
}
}
}
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3、在Design视图下将WindowsState设置成Minimized,ShowInTaskbar设置成False
其次根据每个用户的需要修改ChangeRes方法里对分辨率的设置,生成工程后将可执行文件放在此用户的启动文件夹内
总结:
程序的原理很简单,在用户登录时将分辨率设置成用户的期望值,程序在用户登出前始终运行,但用户不会察觉,在用户登出时,程序被终止,分辨率被设置回特定值,以此实现统一登录分辨率并且各用户有自己的分辨率。
改进:
如果用户较多,可以通过程序参数来改变屏幕分辨率,避免多次生成工程并产生多个版本的混乱。
测试平台:
Windows Server 2003,Visual C# Express 2005 Beta 1