2024-03-23发表2025-03-15更新WPF

在wpf中使用svg图形

准备一个svg资源

其svg代码为

<?xml version="1.0" encoding="UTF-8"?>
<svg width="19" height="19" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
    <path d="M18.2838 43.1713C14.9327 42.1736 11.9498 40.3213 9.58787 37.867C10.469 36.8227 11 35.4734 11 34.0001C11 30.6864 8.31371 28.0001 5 28.0001C4.79955 28.0001 4.60139 28.01 4.40599 28.0292C4.13979 26.7277 4 25.3803 4 24.0001C4 21.9095 4.32077 19.8938 4.91579 17.9995C4.94381 17.9999 4.97188 18.0001 5 18.0001C8.31371 18.0001 11 15.3138 11 12.0001C11 11.0488 10.7786 10.1493 10.3846 9.35011C12.6975 7.1995 15.5205 5.59002 18.6521 4.72314C19.6444 6.66819 21.6667 8.00013 24 8.00013C26.3333 8.00013 28.3556 6.66819 29.3479 4.72314C32.4795 5.59002 35.3025 7.1995 37.6154 9.35011C37.2214 10.1493 37 11.0488 37 12.0001C37 15.3138 39.6863 18.0001 43 18.0001C43.0281 18.0001 43.0562 17.9999 43.0842 17.9995C43.6792 19.8938 44 21.9095 44 24.0001C44 25.3803 43.8602 26.7277 43.594 28.0292C43.3986 28.01 43.2005 28.0001 43 28.0001C39.6863 28.0001 37 30.6864 37 34.0001C37 35.4734 37.531 36.8227 38.4121 37.867C36.0502 40.3213 33.0673 42.1736 29.7162 43.1713C28.9428 40.752 26.676 39.0001 24 39.0001C21.324 39.0001 19.0572 40.752 18.2838 43.1713Z" fill="#2F88FF" stroke="#333" stroke-width="3" stroke-linejoin="bevel"/>
    <path d="M24 31C27.866 31 31 27.866 31 24C31 20.134 27.866 17 24 17C20.134 17 17 20.134 17 24C17 27.866 20.134 31 24 31Z" fill="#43CCF8" stroke="#FFF" stroke-width="3" stroke-linejoin="bevel"/>
</svg>

使用WPF中的Path来绘制SVG，Path最重要的属性是Data，其数据类型为Geometry抽象类，而且WPF提供路径标记法（图形微语言）来替代标签式语法。使用方式参考WPF绘图。
上面的svg代码不能直接使用，进一步处理一下，其实就是将每个<path>中的d属性值全部放到一起(直接放在一起就可以，有没有空格无所谓)，上面的svg中有两个path，最后组合结果为

M18.2838 43.1713C14.9327 42.1736 11.9498 40.3213 9.58787 37.867C10.469 36.8227 11 35.4734 11 34.0001C11 30.6864 8.31371 28.0001 5 28.0001C4.79955 28.0001 4.60139 28.01 4.40599 28.0292C4.13979 26.7277 4 25.3803 4 24.0001C4 21.9095 4.32077 19.8938 4.91579 17.9995C4.94381 17.9999 4.97188 18.0001 5 18.0001C8.31371 18.0001 11 15.3138 11 12.0001C11 11.0488 10.7786 10.1493 10.3846 9.35011C12.6975 7.1995 15.5205 5.59002 18.6521 4.72314C19.6444 6.66819 21.6667 8.00013 24 8.00013C26.3333 8.00013 28.3556 6.66819 29.3479 4.72314C32.4795 5.59002 35.3025 7.1995 37.6154 9.35011C37.2214 10.1493 37 11.0488 37 12.0001C37 15.3138 39.6863 18.0001 43 18.0001C43.0281 18.0001 43.0562 17.9999 43.0842 17.9995C43.6792 19.8938 44 21.9095 44 24.0001C44 25.3803 43.8602 26.7277 43.594 28.0292C43.3986 28.01 43.2005 28.0001 43 28.0001C39.6863 28.0001 37 30.6864 37 34.0001C37 35.4734 37.531 36.8227 38.4121 37.867C36.0502 40.3213 33.0673 42.1736 29.7162 43.1713C28.9428 40.752 26.676 39.0001 24 39.0001C21.324 39.0001 19.0572 40.752 18.2838 43.1713ZM24 31C27.866 31 31 27.866 31 24C31 20.134 27.866 17 24 17C20.134 17 17 20.134 17 24C17 27.866 20.134 31 24 31Z

3.添加到WPFUI中使用

<StackPanel>
    <Border Width="100" Height="100">
        <Path
            x:Name="svgPath"
            Data="M18.2838 43.1713C14.9327 42.1736 11.9498 40.3213 9.58787 37.867C10.469 36.8227 11 35.4734 11 34.0001C11 30.6864 8.31371 28.0001 5 28.0001C4.79955 28.0001 4.60139 28.01 4.40599 28.0292C4.13979 26.7277 4 25.3803 4 24.0001C4 21.9095 4.32077 19.8938 4.91579 17.9995C4.94381 17.9999 4.97188 18.0001 5 18.0001C8.31371 18.0001 11 15.3138 11 12.0001C11 11.0488 10.7786 10.1493 10.3846 9.35011C12.6975 7.1995 15.5205 5.59002 18.6521 4.72314C19.6444 6.66819 21.6667 8.00013 24 8.00013C26.3333 8.00013 28.3556 6.66819 29.3479 4.72314C32.4795 5.59002 35.3025 7.1995 37.6154 9.35011C37.2214 10.1493 37 11.0488 37 12.0001C37 15.3138 39.6863 18.0001 43 18.0001C43.0281 18.0001 43.0562 17.9999 43.0842 17.9995C43.6792 19.8938 44 21.9095 44 24.0001C44 25.3803 43.8602 26.7277 43.594 28.0292C43.3986 28.01 43.2005 28.0001 43 28.0001C39.6863 28.0001 37 30.6864 37 34.0001C37 35.4734 37.531 36.8227 38.4121 37.867C36.0502 40.3213 33.0673 42.1736 29.7162 43.1713C28.9428 40.752 26.676 39.0001 24 39.0001C21.324 39.0001 19.0572 40.752 18.2838 43.1713Z M24 31C27.866 31 31 27.866 31 24C31 20.134 27.866 17 24 17C20.134 17 17 20.134 17 24C17 27.866 20.134 31 24 31Z"
            Fill="OrangeRed"
            Stretch="Uniform" />
    </Border>
</StackPanel>

实现效果

可以看到，图形已经绘制成功，但是颜色还需要自己设定。

使用工具直接转化

Nuget安装Svg2GeometryString

该库非常简单，常用的方法有三个

用户可以传入一个SVG格式文件，返回文件对应的图形微语言数据字符串。
public static String Parse(FileInfo svgFile)
用户可以传入一个包含多个SVG格式文件的文件夹，返回文件夹内所有图标的微语言字符串，按照列表形式反馈
public static List<SvgFileModel> Parse(DirectoryInfo directory)
用户输入一个文件夹地址，输出C#类结构的文件，每个属性代表一个字符串，防止文件名冲突，用户最好还需要输入文件名检查规则。
public static bool ParseToClassFile(DirectoryInfo directory, FileInfo outputFile, Func<string, string> getPropertyName = null)