IsLetterOrDigit Method (Char)
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Char.IsLetterOrDigit Method (Char)

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

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

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

public static bool IsLetterOrDigit(
	char c
)

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 alphabetic letters and decimal digits are members of the following categories in UnicodeCategory: UppercaseLetter, LowercaseLetter, TitlecaseLetter, ModifierLetter, OtherLetter, or DecimalDigitNumber.

The following example demonstrates IsLetterOrDigit.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      string str = "newline:\n";

      outputBlock.Text += Char.IsLetterOrDigit('8').ToString() + "\n";	
      outputBlock.Text += (Char.IsLetterOrDigit(str, 8).ToString()) + "\n";
   }
}
// The example displays the following output:
//    True
//    False


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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