c# - DPI 图形屏幕分辨率像素 WinForm PrintPageEventArgs

Question

对于运行我的应用程序的任何显示器，Dpi 点与像素有何关系？

int points;
Screen primary;

public Form1() {
  InitializeComponent();
  points = -1;
  primary = null;
}

void OnPaint(object sender, PaintEventArgs e) {
  if (points < 0) {
    points = (int)(e.Graphics.DpiX / 72.0F); // There are 72 points per inch
  }
  if (primary == null) {
    primary = Screen.PrimaryScreen;
    Console.WriteLine(primary.WorkingArea.Height);
    Console.WriteLine(primary.WorkingArea.Width);
    Console.WriteLine(primary.BitsPerPixel);
  }
}

我现在是否拥有所需的所有信息？

我可以使用上述任何信息来找出 1200 像素到底有多长吗？

Answer 1

DPI 的字面意思是“每英寸点数”——其中点==像素。所以要确定1200像素有多长:

int inchesLong = (1200 / e.Graphics.DpiX);