Introduce this library: Markdown files are displayed in C#Blazor

1 Talk about purpose

前几天上线了一个在线 Icon 转换工具，为了让大家使用放心，改了点代码，在转换下载 Icon 图标后立即删除临时文件，并在工具下面贴上了工具的开发步骤和代码，大家看这样改是否合适，见Issue 1。

这篇不讲代码修改过程(因为工具和网站博文已经同步更新)，本文讲讲在工具下方展示 Markdown 文件的实现方式，先看效果：

** Why add this function? **

My idea is that in addition to providing the tool for free use, we can also let everyone understand how this tool was developed. This should be more convenient:

1. 默认是不显示的，点击如何开发的？的按钮加载开发文章说明。
2. 评论功能目前没有（不排除后面加上），需要点击我要建议（吐槽）按钮跳转到Dotnet9网站同篇博文留言。
3. 旁边有个按钮我要浏览源码可以点击浏览工具源码。

Let's talk about how to display the Markdown file in Blazor, first explaining the functions completed so far:

1. Just display the Markdown file as html.
2. Highlight is not currently added.

2 Development steps

参考blazor-markdown。

1. introduced with the

<PackageReference Include="BlazorMarkdown" Version="1.0.0" />
<PackageReference Include="HtmlSanitizer" Version="7.1.488" />

2. injection assembly

Program.cs

builder.Services.AddScoped<IHtmlSanitizer, HtmlSanitizer>(x =>
{
    // Configure sanitizer rules as needed here.
    // For now, just use default rules + allow class attributes
    var sanitizer = new HtmlSanitizer();
    sanitizer.AllowedAttributes.Add("class");
    return sanitizer;
});

3. reference namespace

_Imports.razor

@using BlazorMarkdown

4. use

Prepare the Markdown file, for example, if I put it under wwwroot:

在IcoTool.razor中就可以直接使用了：

<Markdown FilePath="wwwroot/2022/02/2022-02-22_02.md" />

summary

It's over, it's as simple as that. See the beginning of the article for the effect. I won't be wordy today.

Forget that there are multimedia files such as pictures in markdown, remember to add these styles to achieve adaptability:

<style>
    h3 {
        border-bottom: 1px solid #eee;
        margin-top: 50px;
        padding-bottom: 10px;
    }

    pre {
        background: #1E1E1E;
        color: #eee;
        overflow-x: auto;
        padding: 0.5em !important;
        white-space: pre;
        word-break: normal;
        word-wrap: normal;
    }

    img, video, source { max-width: 100% }

    pre > code { white-space: pre; }
</style>