How to convert html to formatted plain text | C#


Whether you want to convert an HTML page into pure text so you can parse out that special piece of information, or you simply want to load a page from the Net into your own word processing package, this mini function could come in handy.

It’s called StripTags and accepts an HTML string. Using a regular expression, it identifies all, removes them, and returns the modified string. Here’s the code:

<%@ Page Language="C#" ValidateRequest="False" AutoEventWireup="true" CodeFile="StripTag.aspx.cs"  
 Inherits="StripTag" %>  
  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head runat="server">  
 <title>Untitled Page</title>  
</head>  
<body>  
 <form id="form1" runat="server">  
     <div>  
         <asp:TextBox ID="TextBox1" runat="server" Height="172px" Width="363px" TextMode="MultiLine"></asp:TextBox></div>  
     <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />  
     <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>  
 </form>  
</body>  
</html>  

  
using System;  
using System.Data;  
using System.Configuration;  
using System.Collections;  
using System.Web;  
using System.Web.Security;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.WebControls.WebParts;  
using System.Web.UI.HtmlControls;  
  
public partial class StripTag : System.Web.UI.Page  
{  
   protected void Page_Load(object sender, EventArgs e)  
   {  
  
  
   }  
   public string StripTags(string HTML)  
   {  
       // Removes tags from passed HTML   
       return System.Text.RegularExpressions.Regex.Replace(HTML, "<[^>]*>", "");  
   }  
  
  
   protected void Button1_Click(object sender, EventArgs e)  
   {  
       Label1.Text = StripTags(TextBox1.Text);  
  
   }  
}

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