Char::IsLetterOrDigit Method (String, Int32)
Indicates whether the character at the specified position in a specified string is categorized as a letter or a decimal digit.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- s
- Type: System::String
A string.
- index
- Type: System::Int32
The position of the character to evaluate in s.
Return Value
Type: System::Booleantrue if the character at position index in s is a letter or a decimal digit; otherwise, false.
| Exception | Condition |
|---|---|
| ArgumentNullException | s is nullptr. |
| ArgumentOutOfRangeException | index is less than zero or greater than the last position in s. |
Character positions in a string are indexed starting from zero.
Valid letters and decimal digits are members of the following categories in UnicodeCategory: UppercaseLetter, LowercaseLetter, TitlecaseLetter, ModifierLetter, OtherLetter, or DecimalDigitNumber.
The following code example demonstrates IsLetterOrDigit.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.