CharUnicodeInfo Class
Retrieves information about a Unicode character. This class cannot be inherited.
Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)
| Name | Description | |
|---|---|---|
![]() ![]() ![]() ![]() | GetNumericValue(Char) | Gets the numeric value associated with the specified character. |
![]() ![]() ![]() ![]() | GetNumericValue(String, Int32) | Gets the numeric value associated with the character at the specified index of the specified string. |
![]() ![]() ![]() ![]() | GetUnicodeCategory(Char) | Gets the Unicode category of the specified character. |
![]() ![]() ![]() ![]() | GetUnicodeCategory(String, Int32) | Gets the Unicode category of the character at the specified index of the specified string. |
The Unicode Standard defines several properties for Unicode characters, one of which is the character's category. For example, a character might be categorized as an uppercase letter, a lowercase letter, a decimal digit number, a letter number, a connector punctuation, a math symbol, or a currency symbol. Your application can use the character's category to govern string-based operations such as parsing.
The UnicodeCategory enumeration defines categories for Unicode characters. The CharUnicodeInfo class is used to obtain the UnicodeCategory value for a specific character. In addition, the class provides information about the numeric value of Unicode characters. A character's numeric value applies only to numeric characters, which include fractions, subscripts, superscripts, Roman numerals, currency numerators, encircled numbers, and script-specific digits.
For more information on Unicode characters, see the Unicode Standard.
The following code example shows the values returned by each method for different types of characters.
Imports System.Globalization Public Class Example Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock) outputBlock.Text &= " c Num UnicodeCategory" & vbCrLf outputBlock.Text &= "U+0061 LATIN SMALL LETTER A " PrintProperties(outputBlock, "a"c) outputBlock.Text &= "U+0393 GREEK CAPITAL LETTER GAMMA " PrintProperties(outputBlock, ChrW(&H393)) outputBlock.Text &= "U+0039 DIGIT NINE " PrintProperties(outputBlock, "9"c) outputBlock.Text &= "U+00B2 SUPERSCRIPT TWO " PrintProperties(outputBlock, ChrW(&HB2)) outputBlock.Text &= "U+00BC VULGAR FRACTION ONE QUARTER " PrintProperties(outputBlock, ChrW(&HBC)) outputBlock.Text &= "U+0BEF TAMIL DIGIT NINE " PrintProperties(outputBlock, ChrW(&HBEF)) outputBlock.Text &= "U+0BF0 TAMIL NUMBER TEN " PrintProperties(outputBlock, ChrW(&HBF0)) outputBlock.Text &= "U+0F33 TIBETAN DIGIT HALF ZERO " PrintProperties(outputBlock, ChrW(&HF33)) outputBlock.Text &= "U+2788 CIRCLED SANS-SERIF DIGIT NINE " PrintProperties(outputBlock, ChrW(&H2788)) End Sub Public Shared Sub PrintProperties(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal c As Char) outputBlock.Text += String.Format(" {0,-3}", c) outputBlock.Text += String.Format(" {0,-5}", CharUnicodeInfo.GetNumericValue(c)) outputBlock.Text += String.Format("{0}", CharUnicodeInfo.GetUnicodeCategory(c)) & vbCrLf End Sub End Class ' This example produces the following output. ' U+0061 LATIN SMALL LETTER A a -1 LowercaseLetter ' U+0393 GREEK CAPITAL LETTER GAMMA G -1 UppercaseLetter ' U+0039 DIGIT NINE 9 9 DecimalDigitNumber ' U+00B2 SUPERSCRIPT TWO � 2 OtherNumber ' U+00BC VULGAR FRACTION ONE QUARTER � 0.25 OtherNumber ' U+0BEF TAMIL DIGIT NINE ? 9 DecimalDigitNumber ' U+0BF0 TAMIL NUMBER TEN ? 10 OtherNumber ' U+0F33 TIBETAN DIGIT HALF ZERO ? -0.5 OtherNumber ' U+2788 CIRCLED SANS-SERIF DIGIT NINE ? 9 OtherNumber
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