Uri.IsHexDigit Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Determines whether a specified character is a valid hexadecimal digit.

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

Syntax

Public Shared Function IsHexDigit ( _
    character As Char _
) As Boolean
public static bool IsHexDigit(
    char character
)

Parameters

Return Value

Type: System..::.Boolean
A Boolean value that is true if the character is a valid hexadecimal digit; otherwise false.

Remarks

Hexadecimal digits are the digits 0 to 9 and the letters A-F or a-f.

Examples

The following example determines whether a character is a hexadecimal character and, if it is, writes the corresponding decimal value to the console.

Dim testChar As Char = "e"
If Uri.IsHexDigit(testChar) = True Then 
  outputBlock.Text &= testChar
  outputBlock.Text &= "is the hexadecimal representation of "
  outputBlock.Text &= Uri.FromHex(testChar)
  outputBlock.Text &= vbCrLf
Else
  outputBlock.Text &= testChar
  outputBlock.Text &= "is not a hexadecimal character"
  outputBlock.Text &= vbCrLf
End If
char  testChar = 'e';
if (Uri.IsHexDigit(testChar) == true) {
    outputBlock.Text += testChar;
    outputBlock.Text += "is the hexadecimal representation of ";
    outputBlock.Text += Uri.FromHex(testChar);
    outputBlock.Text += "\n";
}
else {
    outputBlock.Text += testChar;
    outputBlock.Text += "is not a hexadecimal character\n";
}

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Uri Class

System Namespace