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Uri.FromHex(Char) Method

Definition

Gets the decimal value of a hexadecimal digit.

public static int FromHex (char digit);

Parameters

digit
Char

The hexadecimal digit (0-9, a-f, A-F) to convert.

Returns

A number from 0 to 15 that corresponds to the specified hexadecimal digit.

Exceptions

digit is not a valid hexadecimal digit (0-9, a-f, 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.

char  testChar = 'e';
if (Uri.IsHexDigit(testChar))
    Console.WriteLine("'{0}' is the hexadecimal representation of {1}", testChar, Uri.FromHex(testChar));
else
    Console.WriteLine("'{0}' is not a hexadecimal character", testChar);

string returnString = Uri.HexEscape(testChar);
Console.WriteLine("The hexadecimal value of '{0}' is {1}", testChar, returnString);

Remarks

The FromHex method converts a character representing a hexadecimal digit (0-9, a-f, A-F) to its decimal value (0 to 15). If digit is not a valid hexadecimal digit, an ArgumentException exception is thrown.

Applies to

Produit Versions
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.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