如何获得所有已安装的固定宽度字体？

I'm wondering if there are any simple ways to get a list of all fixed-width (monospaced) fonts installed on a user's system in C#?

我想知道是否有任何简单的方法来获取在C＃中安装在用户系统上的所有固定宽度（等宽字体）字体的列表？

I'm using .net 3.5 so have access to the WPF System.Windows.Media namespace and LINQ to get font information, but I'm not sure what I'm looking for.

我正在使用.net 3.5，因此可以访问WPF System.Windows.Media命名空间和LINQ来获取字体信息，但我不确定我在寻找什么。

I want to be able to provide a filtered list of monospaced fonts and/or pick out monospaced fonts from a larger list of fonts (as seen in the VS options dialog).

我希望能够提供一个过滤的等宽字体列表和/或从更大的字体列表中选择等宽字体（如VS选项对话框中所示）。

3 个解决方案

#1

Have a look at:

看一下：

http://www.pinvoke.net/default.aspx/Structures/LOGFONT.html

Use one of the structures in there, then loop over families, instantiating a Font, and getting the LogFont value and checking lfPitchAndFamily.

使用其中的一个结构，然后循环遍历族，实例化Font，获取LogFont值并检查lfPitchAndFamily。

The following code is written on the fly and untested, but something like the following should work:

下面的代码是动态编写的，未经测试，但以下代码应该有效：

foreach (FontFamily ff in System.Drawing.FontFamily.Families)
{
    if (ff.IsStyleAvailable(FontStyle.Regular))
    {
        Font font = new Font(ff, 10);
        LOGFONT lf = new LOGFONT();
        font.ToLogFont(lf);
        if (lf.lfPitchAndFamily ^ 1)
        {
            do stuff here......
        }
    }
}

#2

Unfortunately ToLogFont function does not fill lfPitchAndFamily field to correct values. In my case it's always 0.

不幸的是，ToLogFont函数没有填充lfPitchAndFamily字段来更正值。在我的情况下，它总是0。

One approximation to detect which fonts might be fixed is the following

检测哪些字体可能被修复的一个近似值如下

    foreach ( FontFamily ff in FontFamily.Families ) {
            if ( ff.IsStyleAvailable( FontStyle.Regular ) ) {
                float diff;
                using ( Font font = new Font( ff, 16 ) ) {
                    diff = TextRenderer.MeasureText( "WWW", font ).Width - TextRenderer.MeasureText( "...", font ).Width;
                }
                if ( Math.Abs( diff ) < float.Epsilon * 2 ) {
                    Debug.WriteLine( ff.ToString() );
                }
            }

        }

Keep in mind that they are several false positives, for example Wingdings

请记住，他们是几个误报，例如Wingdings

#3

AFAIK you can't do it using BCL libraries only. You have to use WinAPI interop.

AFAIK你不能只使用BCL库。您必须使用WinAPI互操作。

You need to analyze 2 lowest bits of LOGFONT.lfPitchAndFamily member. There is a constant FIXED_PITCH (means that font is fixed-width) that can be used as a bit mask for lfPitchAndFamily.

您需要分析LOGFONT.lfPitchAndFamily成员的2个最低位。有一个常量FIXED_PITCH（表示字体是固定宽度），可用作lfPitchAndFamily的位掩码。

Here is a useful article:

这是一篇有用的文章：

Enumerating Fonts

枚举字体

Enumerating fonts can be a little confusing, and unless you want to enumerate all fonts on your system, can be a little more difficult than MSDN suggests. This article will explain exactly the steps you need to use to find every fixed-width font on your system, and also enumerate every possible size for each individual font.

枚举字体可能有点令人困惑，除非你想枚举系统中的所有字体，否则比MSDN建议的要困难一些。本文将准确解释您在系统中查找每个固定宽度字体所需的步骤，并列出每种字体的每个可能大小。

#1