Pipe-based markdown tables are not converting correctly to HTML #462

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claunia · 2026-01-29T14:37:24Z

claunia commented

2026-01-29 14:37:24 +00:00

Originally created by @nhamawi on GitHub (May 7, 2021).

EDITED TO REPRODUCE OIRIGINAL ISSUE FOR OTHERS THAT MIGHT RUN INTO THE SAME ISSUE

[... or the documentation is missing some relevant setup information]

When trying to convert a pipe-based markdown table to HTML, the result does not include any form of HTML table even with advanced extensions enabled. Instead, the result includes the input text in paragraph blocks and .

This can be reproduced with .netfiddle as follows and the latest version of Markdig (0.24.0):

using System;
using System.IO;
using Markdig;
using Markdig.Renderers;
using Markdig.Parsers;

public class Program
{
	private static string Render(string markdown)
	{
		var writer = new StringWriter();
		var renderer = new HtmlRenderer(writer);
		var pipeline = new MarkdownPipelineBuilder()
			.UseAdvancedExtensions()
			.UsePipeTables()
			.Build();
		var document = MarkdownParser.Parse(markdown, pipeline);
		// pipeline.Setup(renderer); <-- Was missing this. Uncomment to fix this issue
		renderer.Render(document);
		writer.Flush();
		return writer.ToString();
	}

	public static void Main()
	{
		var markdown = "a | b \r\n" + "-- | - \r\n" + "0 | 1 ";
		var html = Render(markdown);
		Console.WriteLine(html);
	}
}

And the output:

<p>a</p>
<p>b</p>
<p>0</p>
<p>1</p>

Originally created by @nhamawi on GitHub (May 7, 2021). **EDITED TO REPRODUCE OIRIGINAL ISSUE FOR OTHERS THAT MIGHT RUN INTO THE SAME ISSUE** [... or the documentation is missing some relevant setup information] When trying to convert a pipe-based markdown table to HTML, the result does not include any form of HTML table even with advanced extensions enabled. Instead, the result includes the input text in paragraph blocks and . This can be reproduced with .netfiddle as follows and the latest version of Markdig (0.24.0): using System; using System.IO; using Markdig; using Markdig.Renderers; using Markdig.Parsers; public class Program { private static string Render(string markdown) { var writer = new StringWriter(); var renderer = new HtmlRenderer(writer); var pipeline = new MarkdownPipelineBuilder() .UseAdvancedExtensions() .UsePipeTables() .Build(); var document = MarkdownParser.Parse(markdown, pipeline); // pipeline.Setup(renderer); <-- Was missing this. Uncomment to fix this issue renderer.Render(document); writer.Flush(); return writer.ToString(); } public static void Main() { var markdown = "a | b \r\n" + "-- | - \r\n" + "0 | 1 "; var html = Render(markdown); Console.WriteLine(html); } } And the output: a b 0 1

claunia closed this issue

2026-01-29 14:37:24 +00:00

claunia commented

2026-01-29 14:37:26 +00:00

@MihaZupan commented on GitHub (May 7, 2021):

A few issues here:

You're not actually using your Render method, you are calling into the default Markdown.ToHtml
You are not using the pipeline for rendering (calling pipeline.Setup(renderer))

This can be done like

private static string Render(string markdown)
{
	var pipeline = new MarkdownPipelineBuilder()
		.UseAdvancedExtensions()
		.Build();
	var document = MarkdownParser.Parse(markdown, pipeline);

	var writer = new StringWriter();
	var renderer = new HtmlRenderer(writer);
	pipeline.Setup(renderer);
	renderer.Render(document);
	writer.Flush();

	return writer.ToString();
}

Or simplify it by using the helpers already provided:

var pipeline = new MarkdownPipelineBuilder()
	.UseAdvancedExtensions()
	.Build();

var document = MarkdownParser.Parse(markdown, pipeline);

return document.ToHtml(pipeline);

var pipeline = new MarkdownPipelineBuilder()
	.UseAdvancedExtensions()
	.Build();

return Markdown.ToHtml(markdown, pipeline);

@MihaZupan commented on GitHub (May 7, 2021): A few issues here: - You're not actually using your `Render` method, you are calling into the default `Markdown.ToHtml` - You are not using the pipeline for rendering (calling `pipeline.Setup(renderer)`) This can be done like ```c# private static string Render(string markdown) { var pipeline = new MarkdownPipelineBuilder() .UseAdvancedExtensions() .Build(); var document = MarkdownParser.Parse(markdown, pipeline); var writer = new StringWriter(); var renderer = new HtmlRenderer(writer); pipeline.Setup(renderer); renderer.Render(document); writer.Flush(); return writer.ToString(); } ``` Or simplify it by using the helpers already provided: ```c# var pipeline = new MarkdownPipelineBuilder() .UseAdvancedExtensions() .Build(); var document = MarkdownParser.Parse(markdown, pipeline); return document.ToHtml(pipeline); ``` ```c# var pipeline = new MarkdownPipelineBuilder() .UseAdvancedExtensions() .Build(); return Markdown.ToHtml(markdown, pipeline); ```

claunia commented

2026-01-29 14:37:26 +00:00

@nhamawi commented on GitHub (May 7, 2021):

Sorry for the obvious and silly oversite as I was reworking code, but was going back and forth with using the render method and just .ToHtml(). Thank you for the quick response!!!

@nhamawi commented on GitHub (May 7, 2021): Sorry for the obvious and silly oversite as I was reworking code, but was going back and forth with using the render method and just .ToHtml(). Thank you for the quick response!!!

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Reference: starred/markdig#462