Char.IsLetterOrDigit Method (Char)

 

Indicates whether the specified Unicode character is categorized as a letter or a decimal digit.

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

Public Shared Function IsLetterOrDigit (
	c As Char
) As Boolean

Parameters

c
Type: System.Char

The Unicode character to evaluate.

Return Value

Type: System.Boolean

true if c is a letter or a decimal digit; otherwise, false.

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.

imports System

Module IsLetterOrDigitSample

    Sub Main()

        Dim str As String
        str = "newline:" + vbNewLine

        Console.WriteLine(Char.IsLetterOrDigit("8"c))       ' Output: "True"
        Console.WriteLine(Char.IsLetterOrDigit(str, 8))     ' Output: "False", because it's a NewLine

    End Sub

End Module

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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