选择System.Drawing.Icon的大小？ [英] Selecting the size of a System.Drawing.Icon?

问题描述

我有有几个不同尺寸（16像素，32PX，64PX）图标。我打电话 ToBitmap（）就可以了，但它始终是返回32PX形象。我如何获取64PX吗？

I have a icon which has a few different sizes (16px, 32px, 64px). I am calling ToBitmap() on it, but it is always returning the 32px image. How do I retrieve the 64px one?

推荐答案

这是ResourceManager类一个相当痛苦的限制。它的getObject（）方法不提供一种方式来传递额外的参数，允许按大小选择返回的图标。一种解决方法是将图标添加到项目中来代替。使用Project +添加现有项目，选择您的.ico文件。选择添加的图标，并更改生成操作属性设置为嵌入的资源。

This is a fairly painful limitation in the ResourceManager class. Its GetObject() method doesn't provide a way to pass extra arguments that would allow selecting the returned icon by size. A workaround is to add the icon to the project instead. Use Project + Add Existing Item, select your .ico file. Select the added icon and change the Build Action property to "Embedded Resource".

您现在可以检索与code这样所需的图标：

You can now retrieve the desired icon with code like this:

    public static Icon GetIconFromEmbeddedResource(string name, Size size) {
        var asm = System.Reflection.Assembly.GetExecutingAssembly();
        var rnames = asm.GetManifestResourceNames();
        var tofind = "." + name + ".ICO";
        foreach (string rname in rnames) {
            if (rname.EndsWith(tofind, StringComparison.CurrentCultureIgnoreCase)) {
                using (var stream = asm.GetManifestResourceStream(rname)) {
                    return new Icon(stream, size);
                }
            }
        }
        throw new ArgumentException("Icon not found");
    }

使用范例：

        var icon1 = GetIconFromEmbeddedResource("ARW04LT", new Size(16, 16));
        var icon2 = GetIconFromEmbeddedResource("ARW04LT", new Size(32, 32));

谨防一种可能的故障模式：该code假定图标添加到包含方法相同的程序集

Beware one possible failure mode: this code assumes that the icon was added to the same assembly that contains the method.

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