WPF DP pixel 轉換工具

 

ng System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
public class Dp_pixels_convert
{
 
 
    public static void TransformToDP(int pixels_w,int pixels_h,out double unitX,out double unitY)
    {
 
        Graphics g = Graphics.FromHwnd(IntPtr.Zero);
        double rate_x=  g.DpiX / 96.0;
        double rate_y = g.DpiY / 96.0;
        unitX = pixels_w / rate_x;
        unitY = pixels_h / rate_y;
    }
 
    public static void TransformToPixels(double unitX,
                              double unitY,
                              out int pixelX,
                              out int pixelY)
    {
        using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
        {
            pixelX = (int)((g.DpiX / 96) * unitX);
            pixelY = (int)((g.DpiY / 96) * unitY);
        }
 
 
    }
 
}