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Razor TagHelper's method of converting Markdown to HTML_Practical tips

韦小宝
Release: 2017-12-16 09:23:55
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The editor below will share with you an article on Razor TagHelper's method of converting Markdown to HTML. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor and take a look.

Markdown is a markup language that can be written using ordinary texteditor. Through simple markup syntax, it can make ordinary text content have a certain Format.

Purpose

Markdown’s syntax is concise and clear, easy to learn, and its functions are stronger than plain text, so many people use it to write blogs . The world's most popular blog platform WordPress and large CMS such as Joomla and Drupal can support Markdown very well. Blog platforms that fully use Markdown editors include Ghost and Typecho.

is used to write documentation and is saved under the directory of the software with the file name of "README.MD".

In addition, now that we have a god-level editor like RStudio, we can also quickly convert Markdown into speech PPT, Word product documents, LaTex papers, and even complete the minimum with a very small amount of code. Prototypes available. In the field of data science, Markdown has been established as a scientific research norm, greatly advancing the historical process of dynamic reproducibility research.

TagHelper

Write a Razor TagHelper to convert Markdown to HTML. You need to use CommonMark. NETthisClass Library.


namespace ZKEACMS.Message.TagHelps
{
 [HtmlTargetElement("markdown", TagStructure = TagStructure.NormalOrSelfClosing)]
 [HtmlTargetElement(Attributes = "markdown")]
 public class MarkdownTagHelper : TagHelper
 {
  public ModelExpression Content { get; set; }
  public async override Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
  {
   if (output.TagName == "markdown")
   {
    output.TagName = null;
   }
   output.Attributes.RemoveAll("markdown");
   var content = await GetContent(output);
   var markdown = WebUtility.HtmlEncode(WebUtility.HtmlDecode(content));
   var html = CommonMarkConverter.Convert(markdown);
   output.Content.SetHtmlContent(html ?? "");
  }
  private async Task GetContent(TagHelperOutput output)
  {
   if (Content == null)
    return (await output.GetChildContentAsync()).GetContent();
   return Content.Model?.ToString();
  }
 }
}
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How to use

First of all, in _ViewImports .cshtml add this TagHelper, like this


@addTagHelper *, ZKEACMS.Message
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Then you can use it directly


<markdown>@item.CommentContent</markdown>
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The above method of converting Markdown to HTML with Razor TagHelper is all the content shared by the editor. I hope it can give you a reference, and I also hope that everyone will support PHP Chinese. net.

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