How to Remove all the HTML tags and display a plain text using C#

Question

I want to remove all html tags from a string.i can achieve this using REGX.

but inside the string if it contains number inside the angular braces <100> it should not remove it .

         var withHtml = "<p>hello <b>there<1234></b></p>";
        var withoutHtml = Regex.Replace(withHtml, "\\<[^\\>]*\\>", string.Empty);

Result: hello there

but needed output : hello there 1234

yes .but the REGX removes <1234> also because its inside the brackects.I want the number also to display — user2405818
– user2405818, Commented Aug 29, 2013 at 9:46
Regex don't know which is Valid HTML and which is not. So regex is not the way to do it. Consider using HTMlAgilityPack — Sriram Sakthivel
– Sriram Sakthivel, Commented Aug 29, 2013 at 9:48
Correct HTML would have those two angle brackets around the number escaped/encoded as < and >. — Sam
– Sam, Commented Aug 29, 2013 at 10:25

Sam · Accepted Answer · 2013-08-29 10:35:10Z

1

Your example of HTML isn't valid HTML since it contains a non-HTML tag. I figure you intended for the angle-brackets to be encoded.

I don't think regular expressions are suitable for HTML parsing. I recommend using an HTML parser such as HTML Agility Pack to do this.

Here's an example:

var withHtml = "<p>hello <b>there&lt;1234&gt;</b></p>";
var document = new HtmlDocument();
document.LoadHtml(withHtml);

var withoutHtml = HtmlEntity.DeEntitize(document.DocumentNode.InnerText);

Just add the HtmlAgilityPack NuGet package and a reference to System.Xml to make it work.

answered Aug 29, 2013 at 10:35

Sam

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Comments

Mitch · Accepted Answer · 2013-08-29 10:04:29Z

0

Not sure you can do this in one regular expression, or that a regex is really the correct way as others have suggested. A simple improvement that gets you almost there is:

Regex.Replace(withHtml, "\\<[^\\>0-9]*\\>", string.Empty);

Gives "hello there<1234>" You then just need to replace all angled brackets.

answered Aug 29, 2013 at 10:04

Mitch

1

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