[Fork] Html to Text | C# Online Compiler

[Fork] Html to Text by Anonymous

// @nuget: HtmlAgilityPack
using System;
using HtmlAgilityPack;
using System.Collections.Generic;
using System.Web;
using System.Text;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Text.RegularExpressions;

public class Program
{
	public static void Main()
	{
		var html = @"<html><head><meta name=""Generator"" content=""Microsoft Exchange Server"">
<!-- converted from text -->
<style><!-- .EmailQuote { margin-left: 1pt; padding-left: 4pt; border-left: #800000 2px solid; } --></style></head>
<body>
<font size=""2""><span style=""font-size:11pt;""><div class=""PlainText""> <p>Hello<br/>world, how are you doing today?</p><p>This is a separate <b>paragraph</b></p></div><div>Please replace &lt;b&gt; tags with &lt;i&gt; tags</div></span></font>
</body>
</html>";
		var texts = GetTextFromHtml(html);
		var regextexts = RemoveHtmlEntities(html);
		Console.WriteLine(texts);
		
		Console.WriteLine("----------------------------");
		
		Console.WriteLine(regextexts);
	}
	
	private static string RemoveHtmlEntities(string input)
    {
        input = HttpUtility.HtmlDecode(input);
        input = Regex.Replace(input, "&quot;", "'");
        return Regex.Replace(input, "<.*?>", String.Empty).Trim();
    }

	private static string GetTextFromHtml(string html)
	{
		if (string.IsNullOrEmpty(html))
			return "";
		var htmlDoc = new HtmlDocument();
		htmlDoc.LoadHtml(html);
		return GetTextFromNodes(htmlDoc.DocumentNode.ChildNodes);
	}

	private static string GetTextFromNodes(HtmlNodeCollection nodes, int indent = 0)
	{
		StringBuilder texts = new StringBuilder();
		string[] linebreaks = {"p", "br", "table", "th", "tr"};
		string[] indentTag = {"ul", "li"};
		foreach (var node in nodes)
		{
			if (node.Name.ToLowerInvariant() == "style")
				continue;
			if (node.HasChildNodes)
			{
				if (indentTag.Contains(node.Name.ToLowerInvariant()))
					texts.Append(GetTextFromNodes(node.ChildNodes, indent + 1));
				else
					texts.Append(GetTextFromNodes(node.ChildNodes, indent));
			}
			else
			{
				var innerText = node.InnerText;
				if (!string.IsNullOrWhiteSpace(innerText))
				{
					innerText = HttpUtility.HtmlDecode(innerText);
					texts.Append(new String(' ', indent) + innerText);
				}
			}

			if (node.Name.ToLowerInvariant() == "a")
				texts.Append("\r\n" + node.Attributes["href"].Value + "\r\n");
			if (node.Name.ToLowerInvariant() == "img" && !node.Attributes["src"].Value.EndsWith("invis.gif"))
				texts.Append("\r\n" + node.Attributes["src"].Value + "\r\n");
			if (linebreaks.Contains(node.Name.ToLowerInvariant()))
				texts.Append("\r\n");
		}

		return texts.ToString();
	}
}

​x
 
// @nuget: HtmlAgilityPack
using System;
using HtmlAgilityPack;
using System.Collections.Generic;
using System.Web;
using System.Text;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Text.RegularExpressions;
​
public class Program
{
    public static void Main()
    {
        var html = @"<html><head><meta name=""Generator"" content=""Microsoft Exchange Server"">
<!-- converted from text -->
<style><!-- .EmailQuote { margin-left: 1pt; padding-left: 4pt; border-left: #800000 2px solid; } --></style></head>
<body>
<font size=""2""><span style=""font-size:11pt;""><div class=""PlainText""> <p>Hello<br/>world, how are you doing today?</p><p>This is a separate <b>paragraph</b></p></div><div>Please replace &lt;b&gt; tags with &lt;i&gt; tags</div></span></font>
</body>
</html>";
        var texts = GetTextFromHtml(html);
        var regextexts = RemoveHtmlEntities(html);
        Console.WriteLine(texts);
        
        Console.WriteLine("----------------------------");
        
        Console.WriteLine(regextexts);
    }
    
    private static string RemoveHtmlEntities(string input)
    {
        input = HttpUtility.HtmlDecode(input);
        input = Regex.Replace(input, "&quot;", "'");
        return Regex.Replace(input, "<.*?>", String.Empty).Trim();
    }
​
    private static string GetTextFromHtml(string html)
    {
        if (string.IsNullOrEmpty(html))
            return "";
        var htmlDoc = new HtmlDocument();
        htmlDoc.LoadHtml(html);
        return GetTextFromNodes(htmlDoc.DocumentNode.ChildNodes);
    }
​
    private static string GetTextFromNodes(HtmlNodeCollection nodes, int indent = 0)
    {
        StringBuilder texts = new StringBuilder();
        string[] linebreaks = {"p", "br", "table", "th", "tr"};
        string[] indentTag = {"ul", "li"};
        foreach (var node in nodes)
        {
            if (node.Name.ToLowerInvariant() == "style")
                continue;
            if (node.HasChildNodes)
            {
                if (indentTag.Contains(node.Name.ToLowerInvariant()))
                    texts.Append(GetTextFromNodes(node.ChildNodes, indent + 1));
                else
                    texts.Append(GetTextFromNodes(node.ChildNodes, indent));
            }
            else
            {
                var innerText = node.InnerText;
                if (!string.IsNullOrWhiteSpace(innerText))
                {
                    innerText = HttpUtility.HtmlDecode(innerText);
                    texts.Append(new String(' ', indent) + innerText);
                }
            }
​
            if (node.Name.ToLowerInvariant() == "a")
                texts.Append("\r\n" + node.Attributes["href"].Value + "\r\n");
            if (node.Name.ToLowerInvariant() == "img" && !node.Attributes["src"].Value.EndsWith("invis.gif"))
                texts.Append("\r\n" + node.Attributes["src"].Value + "\r\n");
            if (linebreaks.Contains(node.Name.ToLowerInvariant()))
                texts.Append("\r\n");
        }
​
        return texts.ToString();
    }
}

ASP.Net 1-2

Last Run:	7:25:21 pm
Compile:	0.005s
Execute:	0.05s
Memory:	2.59Mb
CPU:	0.055s

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