Char.GetUnicodeCategory Method (System) (original) (raw)
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Char.GetUnicodeCategory Method
- Reference
Definition
Categorizes a Unicode character into a group identified by one of the UnicodeCategory values.
Overloads
Examples
The following code example demonstrates GetUnicodeCategory.
using namespace System;
int main()
{
char ch2 = '2';
String^ str = "Upper Case";
Console::WriteLine( Char::GetUnicodeCategory( 'a' ).ToString() ); // Output: S"LowercaseLetter"
Console::WriteLine( Char::GetUnicodeCategory( ch2 ).ToString() ); // Output: S"DecimalDigitNumber"
Console::WriteLine( Char::GetUnicodeCategory( str, 6 ).ToString() ); // Output: S"UppercaseLetter"
}
using System;
public class GetUnicodeCategorySample {
public static void Main() {
char ch2 = '2';
string str = "Upper Case";
Console.WriteLine(Char.GetUnicodeCategory('a')); // Output: "LowercaseLetter"
Console.WriteLine(Char.GetUnicodeCategory(ch2)); // Output: "DecimalDigitNumber"
Console.WriteLine(Char.GetUnicodeCategory(str, 6)); // Output: "UppercaseLetter"
}
}
open System
let ch2 = '2'
let str = "Upper Case"
printfn $"{Char.GetUnicodeCategory 'a'}" // Output: "LowercaseLetter"
printfn $"{Char.GetUnicodeCategory ch2}" // Output: "DecimalDigitNumber"
printfn $"{Char.GetUnicodeCategory(str, 6)}" // Output: "UppercaseLetter"
Module GetUnicodeCategorySample
Sub Main()
Dim ch2 As Char
ch2 = "2"c
Dim str As String
str = "Upper Case"
Console.WriteLine(Char.GetUnicodeCategory("a"c)) ' Output: "1" (LowercaseLetter)
Console.WriteLine(Char.GetUnicodeCategory(ch2)) ' Output: "8" (DecimalDigitNumber)
Console.WriteLine(Char.GetUnicodeCategory(str, 6)) ' Output: "0" (UppercaseLetter)
End Sub
End Module
GetUnicodeCategory(Char)
GetUnicodeCategory(String, Int32)
Source:
Source:
Source:
Categorizes the character at the specified position in a specified string into a group identified by one of the UnicodeCategory values.
public:
static System::Globalization::UnicodeCategory GetUnicodeCategory(System::String ^ s, int index);
public static System.Globalization.UnicodeCategory GetUnicodeCategory (string s, int index);
static member GetUnicodeCategory : string * int -> System.Globalization.UnicodeCategory
Public Shared Function GetUnicodeCategory (s As String, index As Integer) As UnicodeCategory
Parameters
index
The character position in s
.
Returns
A UnicodeCategory enumerated constant that identifies the group that contains the character at position index
in s
.
Exceptions
index
is less than zero or greater than the last position in s
.
Remarks
Character positions in a string are indexed starting from zero.
The Char.GetUnicodeCategory method does not always return the same UnicodeCategory value as the CharUnicodeInfo.GetUnicodeCategory(String, Int32) method when it is passed a particular character as a parameter. The CharUnicodeInfo.GetUnicodeCategory(String, Int32) method is designed to reflect the current version of the Unicode standard. In contrast, although the Char.GetUnicodeCategory method usually reflects the current version of the Unicode standard, it may return a character's category based on a previous version of the standard or it may return a category that differs from the current standard in order to preserve backward compatibility. As a result, we recommend that you use the CharUnicodeInfo.GetUnicodeCategory(Char) method instead of Char.GetUnicodeCategory(String, Int32).
Starting with .NET Framework 4.6.2, Unicode characters are classified based on The Unicode Standard, Version 8.0.0. In versions of the .NET Framework from the .NET Framework 4 to the .NET Framework 4.6.1, they are classified based on The Unicode Standard, Version 6.3.0.
See also
Applies to
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