Char.GetUnicodeCategory Method

Definition

Categorizes a Unicode character into a group identified by one of the UnicodeCategory values.

Overloads

GetUnicodeCategory(Char)

Categorizes a specified Unicode character into a group identified by one of the UnicodeCategory values.

GetUnicodeCategory(String, Int32)

Categorizes the character at the specified position in a specified string into a group identified by one of the UnicodeCategory values.

Examples

The following code example demonstrates GetUnicodeCategory.

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"
    }
}

GetUnicodeCategory(Char)

Source:
Char.cs
Source:
Char.cs
Source:
Char.cs

Categorizes a specified Unicode character into a group identified by one of the UnicodeCategory values.

public static System.Globalization.UnicodeCategory GetUnicodeCategory (char c);

Parameters

c
Char

The Unicode character to categorize.

Returns

A UnicodeCategory value that identifies the group that contains c.

Remarks

The Char.GetUnicodeCategory method does not always return the same UnicodeCategory value as the CharUnicodeInfo.GetUnicodeCategory(Char) method when it is passed a particular character as a parameter. The CharUnicodeInfo.GetUnicodeCategory(Char) 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(Char).

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

.NET 9 e altre versioni
Prodotto Versioni
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1

GetUnicodeCategory(String, Int32)

Source:
Char.cs
Source:
Char.cs
Source:
Char.cs

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 (string s, int index);

Parameters

s
String

A String.

index
Int32

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

.NET 9 e altre versioni
Prodotto Versioni
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1