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Uri::FromHex Method (Char)

.NET Framework (current version)
 

Gets the decimal value of a hexadecimal digit.

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

C#
C++
F#
VB
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public:
static int FromHex(
	wchar_t digit
)

Parameters

digit
Type: System::Char

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

Return Value

Type: System::Int32

An Int32 value that contains a number from 0 to 15 that corresponds to the specified hexadecimal digit.

Exception Condition
ArgumentException

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

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.

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

C#
C++
VB
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char testChar = 'e';
if ( Uri::IsHexDigit( testChar ) == true )
{
   Console::WriteLine( "'{0}' is the hexadecimal representation of {1}",
      testChar, Uri::FromHex( testChar ) );
}
else
{
   Console::WriteLine( "'{0}' is not a hex character", testChar );
}

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

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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