Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

AntiXssEncoder.HtmlFormUrlEncode Method (String, Int32)

.NET Framework 4.6 and 4.5

Encodes the specified string for use in form submissions whose MIME type is "application/x-www-form-urlencoded" by using the specified code page.

Namespace:  System.Web.Security.AntiXss
Assembly:  System.Web (in System.Web.dll)

public static string HtmlFormUrlEncode(
	string input,
	int codePage
)

Parameters

input
Type: System.String

The string to encode.

codePage
Type: System.Int32

The code page to use to encode the input string.

Return Value

Type: System.String
The encoded string.

This method encodes all characters except those that are in the safe list. Characters are encoded by using %SINGLE_BYTE_HEX notation.

NoteNote

Put double quotation marks (" ") or single quotation marks (' ') around the resulting string before you add it to a page.

The following table lists the default safe characters.

Unicode code chart

Character(s)

Description

C0 Controls and Basic Latin

A-Z

Uppercase alphabetic characters

C0 Controls and Basic Latin

a-z

Lowercase alphabetic characters

C0 Controls and Basic Latin

0-9

Numbers

C0 Controls and Basic Latin

-

Hyphen, minus

C0 Controls and Basic Latin

.

Period, dot, full stop

C0 Controls and Basic Latin

_

Underscore

C0 Controls and Basic Latin

~

Tilde

The following table lists examples of inputs and the corresponding encoded outputs.

alert('XSS Attack!');

alert%28%27XSS+Attack%21%27%29%3b

<script>alert('XSS Attack!');</script>

%3cscript%3ealert%28%27XSS+Attack%21%27%29%3b%3c%2fscript%3e

alert('XSSあAttack!');

alert%28%27XSS%e3%81%82Attack%21%27%29%3b

user@contoso.com

user%40contoso.com

Anti-Cross Site Scripting Namespace

Anti-Cross+Site+Scripting+Namespace

.NET Framework

Supported in: 4.6, 4.5
Show:
© 2015 Microsoft