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HttpUtility.HtmlEncode Method (String)

Converts a string to an HTML-encoded string.

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

public static string HtmlEncode (
	string s
)
public static String HtmlEncode (
	String s
)
public static function HtmlEncode (
	s : String
) : String
Not applicable.

Parameters

s

The string to encode.

Return Value

An encoded string.

If characters such as blanks and punctuation are passed in an HTTP stream, they might be misinterpreted at the receiving end. HTML encoding converts characters that are not allowed in HTML into character-entity equivalents; HTML decoding reverses the encoding. For example, when embedded in a block of text, the characters < and > are encoded as &lt; and &gt; for HTTP transmission.

The following code example demonstrates the HtmlEncode and HtmlDecode methods of the HttpUtility class. The input string is encoded using the HtmlEncode method. The encoded string obtained is then decoded using the HtmlDecode method.

using System;
using System.Web;
using System.IO;

   class MyNewClass
   {
      public static void Main()
      {
         String myString;
         Console.WriteLine("Enter a string having '&' or '\"'  in it: ");
         myString=Console.ReadLine();
         String myEncodedString;
         // Encode the string.
         myEncodedString = HttpUtility.HtmlEncode(myString);
         Console.WriteLine("HTML Encoded string is "+myEncodedString);
         StringWriter myWriter = new StringWriter();
         // Decode the encoded string.
         HttpUtility.HtmlDecode(myEncodedString, myWriter);
         Console.Write("Decoded string of the above encoded string is "+
                        myWriter.ToString());
      }
   }

import System.*;
import System.Web.*;
import System.IO.*;

class MyNewClass
{
    public static void main(String[] args)
    {
        String myString;
        Console.WriteLine("Enter a string having '&' or '\"'  in it: ");
        myString = Console.ReadLine();
        String myEncodedString;
        // Encode the string.
        myEncodedString = HttpUtility.HtmlEncode(myString);
        Console.WriteLine("HTML Encoded string is " + myEncodedString);
        StringWriter myWriter =  new StringWriter();
        // Decode the encoded string.
        HttpUtility.HtmlDecode(myEncodedString, myWriter);
        Console.Write("Decoded string of the above encoded string is " 
            + myWriter.ToString());
    } //main
} //MyNewClass

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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