Converting & to & etc

Question

I want to convert & to &, " to " etc. Is there a function in c# that could do that without writing all the options manually?

Matt Hamsmith · Answer 1 · 2018-07-06T15:59:40.240

117

System.Web.HttpUtility.HtmlDecode()

Edit: Note from here that "To encode or decode values outside of a web application, use..."

System.Net.WebUtility.HtmlDecode()

edited Jul 06 '18 at 15:59

answered Oct 13 '09 at 19:23

Matt Hamsmith

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@AbuHamzah it should not work for &amp but it should work for & – Peter Apr 11 '14 at 07:00
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@BartoszWojcik This method has been around since .NET 1.1. See MSDN documentation: http://msdn.microsoft.com/en-us/library/aa332854%28v=vs.71%29.aspx – Matt Hamsmith Jun 14 '14 at 17:48
I use 4.7.1 but cant find `System.Web.HttpUtility.HtmlDecode()` – Rishav Jul 04 '18 at 22:36
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Rishav, we need to add reference to System.Web in order to use the function. – Nick_F Sep 04 '18 at 09:05

Ian Kemp · Answer 2 · 2015-11-25T12:57:37.117

31

Use the static method

HttpUtility.HtmlEncode

to change & to & and " to ". Use

HttpUtility.HtmlDecode

to do the reverse.

edited Nov 25 '15 at 12:57

answered Oct 13 '09 at 19:28

Ian Kemp

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score 21 · Answer 3 · edited Jun 02 '14 at 13:36

21

You can use System.Net.WebUtility.HtmlDecode(uri);

edited Jun 02 '14 at 13:36

Chris Barlow

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answered Jun 02 '14 at 13:08

Corredera Romain

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@AmirNo-Family If you are not in a web application, then yes, you need the System.Net.WebUtility version. Otherwise, System.Web.HttpUtility.HtmlDecode works just fine. – Matt Hamsmith Jul 06 '18 at 16:05

score 7 · Answer 4 · edited Oct 02 '18 at 08:04

7

using System.Web; 
...
var html = "this is a sample &amp; string"; 
var decodedhtml = HttpUtility.HtmlDecode(html);

edited Oct 02 '18 at 08:04

BDL

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answered Oct 01 '18 at 21:01

Alex W.

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Although this code might (or might not) solve the problem, a good answer should explain what the code does and how it solves the problem. – BDL Oct 02 '18 at 08:05

score 4 · Answer 5 · answered Oct 13 '09 at 19:23

4

Server.HtmlDecode.

answered Oct 13 '09 at 19:23

RichardOD

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This works in ASP.NET. But otherwise, Matt's answer is better. – M4N Oct 13 '09 at 19:25
I was assuming ASP.NET. The documentation mentions HttpUtility's HtmlDecode, as this is what Server.HtmlEncode calls anyway. Its easy to work this out by reading the documentation- Server.HtmlEncode's documentation actually explains what it does, unfortunately HttpUtility.HtmlDecode's doesn't. – RichardOD Oct 13 '09 at 19:29

score -7 · Answer 6 · answered Apr 15 '14 at 19:40

-7

For .NET < 4 simple encoder

    public static string HtmlEncode(string value)
    {
        return value.Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace("\"", "&quot;").Replace("'", "&apos;");
    }

answered Apr 15 '14 at 19:40

Bartosz Wójcik

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Converting & to & etc

6 Answers6

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