AntiXssEncoder.XmlAttributeEncode(String) Method
Definition
Important
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Encodes the specified string for use in XML attributes.
public:
static System::String ^ XmlAttributeEncode(System::String ^ input);public static string XmlAttributeEncode (string input);static member XmlAttributeEncode : string -> stringPublic Shared Function XmlAttributeEncode (input As String) As StringParameters
- input
- String
The string to encode.
Returns
The encoded string.
Remarks
This method encodes all characters except those that are in the safe list. Characters are encoded by using &#DECIMAL; notation.
Note
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. All characters are from the Unicode C0 Controls and Basic Latin character range unless noted in the Description column.
| Unicode code chart | Character(s) | Description |
|---|---|---|
| A-Z | Uppercase Latin alphabetic characters | |
| a-z | Lowercase Latin alphabetic characters | |
| 0-9 | Numbers | |
| ! | Exclamation mark | |
| # | Number sign, hash | |
| $ | Dollar sign | |
| % | Percent sign | |
| ( ) | Parentheses | |
| * | Asterisk | |
| + | Plus sign | |
| , | Comma | |
| - | Hyphen, minus | |
| . | Period, dot, full stop | |
| / | Slash | |
| : | Colon | |
| ; | Semicolon | |
| = | Equals sign | |
| ? | Question mark | |
| @ | Commercial at-sign | |
| [ ] | Square brackets | |
| \ | Backslash | |
| ^ | Caret | |
| _ | Underscore | |
| ` | Grave accent | |
| { } | Braces, curly brackets | |
| | | Vertical line | |
| ~ | Tilde | |
| 0x00A1 - 0x00AC | Special characters between 0x00A1 (161 decimal) and 0x00AC (172 decimal) from the Unicode C1 Controls and Latin-1 Supplement character range. | |
| Special characters between 0x00AE (174 decimal) and 0x00FF (255 decimal) from the Unicode C1 Controls and Latin-1 Supplement character range. | ||
| 0x0100 - 0x017F | Characters between 0x0100 (256 decimal) and 0x017F (383 decimal). (The Unicode Latin-Extended-A character range.) | |
| 0x0180 - 0x024F | Characters between 0x0180 (384 decimal) and 0x024F (591 decimal). (The Unicode Latin-Extended-B character range.) | |
| 0x0250 - 0x02AF | Characters between 0x0250 (592 decimal) and 0x02AF (687 decimal). (The Unicode IPA Extensions character range.) | |
| 0x02B0 - 0x02FF | Characters between 0x02B0 (688 decimal) and 0x02FF (767 decimal). (The Unicode Spacing Modifier Letters character range.) | |
| 0x0300 - 0x036F | Characters between 0x0300 (768 decimal) and 0x036F (879 decimal). (The Unicode Combining Diacritical Marks character range.) |
The following table lists examples of inputs and the corresponding encoded outputs.
alert('XSS Attack!'); |
alert('XSS Attack!'); |
<script>alert('XSS Attack!');</script> |
<script>alert('XSS Attack!');</script> |
alert('XSSあAttack!'); |
alert('XSSあAttack!'); |
user@contoso.com |
user@contoso.com |
"Anti-Cross Site Scripting Namespace" |
"Anti-Cross Site Scripting Namespace" |
To customize the safe list, call the MarkAsSafe method.
