Uri.IsHexEncoding(String, Int32) Method

Reference

Definition

Namespace:: System

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: Uri.cs

Source:: Uri.cs

Source:: Uri.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Determines whether a character in a string is hexadecimal encoded.

public:
 static bool IsHexEncoding(System::String ^ pattern, int index);

public static bool IsHexEncoding(string pattern, int index);

static member IsHexEncoding : string * int -> bool

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

Parameters

pattern: String

The string to check.

index: Int32

The location in pattern to check for hexadecimal encoding.

Returns

Boolean

true if pattern is hexadecimal encoded at the specified location; otherwise, false.

Examples

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

String^ testString = "%75";
int index = 0;
if ( Uri::IsHexEncoding( testString, index ) )
{
   Console::WriteLine( "The character is {0}",
      Uri::HexUnescape( testString, index ) );
}
else
{
   Console::WriteLine( "The character is not hex encoded" );
}

string testString = "%75";
int index = 0;
if (Uri.IsHexEncoding(testString, index))
     Console.WriteLine("The character is {0}", Uri.HexUnescape(testString, ref index));
else
     Console.WriteLine("The character is not hexadecimal encoded");

let testString = "%75"
let mutable index = 0
if Uri.IsHexEncoding(testString, index) then
    printfn $"The character is {Uri.HexUnescape(testString, &index)}"
else
    printfn "The character is not hexadecimal encoded"

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

Remarks

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).

Applies to

Product	Versions
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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