转换计量单位

VB C#

using IronSoftware.Drawing;
using System;

// Instantiate a Rectangle (Default measurement unit is pixels)
Rectangle pxCropRect = new Rectangle(15, 25, 150, 175); // (X, Y, Width, Height)

// Convert and print a Rectangle measurement in millimeters
Rectangle mmCropRect = pxCropRect.ConvertTo(MeasurementUnits.Millimeters, 20);
Console.WriteLine(mmCropRect.X);

// Instantiate a RectangleF in millimeters
IronSoftware.Drawing.RectangleF pxCropRectFloat = new IronSoftware.Drawing.RectangleF(10F, 25F, 100F, 175F, MeasurementUnits.Millimeters); // (X, Y, Width, Height, Units)

// Convert and print a RectangleF measurement in pixels
IronSoftware.Drawing.RectangleF mmCropRectFloat = pxCropRectFloat.ConvertTo(MeasurementUnits.Pixels, 30);
Console.WriteLine(mmCropRectFloat.Y);

Imports IronSoftware.Drawing
Imports System

' Instantiate a Rectangle (Default measurement unit is pixels)
Private pxCropRect As New Rectangle(15, 25, 150, 175) ' (X, Y, Width, Height)

' Convert and print a Rectangle measurement in millimeters
Private mmCropRect As Rectangle = pxCropRect.ConvertTo(MeasurementUnits.Millimeters, 20)
Console.WriteLine(mmCropRect.X)

' Instantiate a RectangleF in millimeters
Dim pxCropRectFloat As New IronSoftware.Drawing.RectangleF(10F, 25F, 100F, 175F, MeasurementUnits.Millimeters) ' (X, Y, Width, Height, Units)

' Convert and print a RectangleF measurement in pixels
Dim mmCropRectFloat As IronSoftware.Drawing.RectangleF = pxCropRectFloat.ConvertTo(MeasurementUnits.Pixels, 30)
Console.WriteLine(mmCropRectFloat.Y)

Install-Package IronSoftware.System.Drawing

转换计量单位

IronDrawing provides an option for users who want to change the measurement unit used in Rectangle or RectangleF from pixels (px) to millimeters (mm) or vice versa. The default measurement unit used in Rectangle and RectangleF is pixels (px).

After a new Rectangle with measurements specified has been instantiated, you can call the conversion method on the Rectangle. For example, use .ConvertTo(MeasurementUnits.Millimeters, 20). This will convert the measurements of the Rectangle to millimeters based on the DPI set by the user. This same approach can also be applied to the RectangleF class.