Uri.IsHexEncoding Method (String, Int32)

 

Determines whether a character in a string is hexadecimal encoded.

Namespace:   System
Assembly:  System (in System.dll)

Public Shared Function IsHexEncoding (
	pattern As String,
	index As Integer
) As Boolean

Parameters

pattern
Type: System.String

The string to check.

index
Type: System.Int32

The location in pattern to check for hexadecimal encoding.

Return Value

Type: System.Boolean

A Boolean value that is true if pattern is hexadecimal encoded at the specified location; otherwise, false.

The IsHexEncoding method checks for hexadecimal encoding that follows the pattern "%hexhex" in a string, where "hex" is a digit from 0 to 9 or a letter from A-F (case-insensitive).

The following code example determines whether a character is hexadecimal encoded and, if so, writes the equivalent character to the console.

Dim testString As String = "%75"
Dim index As Integer = 0
If Uri.IsHexEncoding(testString, index) Then
    Console.WriteLine("The character is {0}", Uri.HexUnescape(testString, index))
Else
    Console.WriteLine("The character is not hexadecimal encoded")
End If

.NET Framework
Available since 1.1
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