MfCharUnicodeInfo Class

(Inherits from MfObject)

Retrieves information about a Unicode character. This class cannot be inherited.
All methods are static.

Links

Constructors

	Name	Description
	Constructor()	Throws MfNotSupportedException if class instance is created.

Methods

	Name	Description
	GetDecimalDigitValue(ch)	Gets the digit value of the specified numeric character.
	GetDecimalDigitValue(s, index)	Gets the digit value of the specified numeric character for the character in string s at the location of Zero-based index.
	GetDigitValue(ch)	Gets the digit value of the specified numeric character.
	GetDigitValue(s, index)	Gets the digit value of the specified for the numeric character in string s at the location of Zero-based index.
	GetNumericValue(ch)	Converts the specified numeric Unicode character to a decimal number.
	GetNumericValue(s, index)	Converts the specified numeric Unicode character to a decimal number for the character in string s at the location of Zero-based index.
	GetUnicodeCategory(c)	Categorizes a specified Unicode character into a group identified by one of the MfUnicodeCategory values for c.
	GetUnicodeCategory(s, index)	Categorizes a specified Unicode character into a group identified by one of the MfUnicodeCategory values for the character in string s at the location of Zero-based index.

Remarks

The Unicode Standard defines a number of Unicode character categories. For example, a character might be categorized as an uppercase letter, a lowercase letter, a decimal digit number, a letter number, a paragraph separator, a math symbol, or a currency symbol. Your application can use the character category to govern string-based operations, such as parsing. The UnicodeCategory enumeration defines the possible character categories.

You use the MfCharUnicodeInfo class to obtain the UnicodeCategory value for a specific character. The CharUnicodeInfo class defines methods that return the following Unicode character values:

Numeric value. Applies only to numeric characters, including fractions, subscripts, superscripts, Roman numerals, currency numerators, encircled numbers, and script-specific digits.
Digit value. Applies to numeric characters that can be combined with other numeric characters to represent a whole number in a numbering system.
Decimal digit value. Applies only to characters that represent decimal digits in the decimal (base 10) system. A decimal digit can be one of ten digits, from zero through nine. These characters are members of the MfUnicodeCategory.DecimalDigitNumber category.

When using this class in your applications, keep in mind the following programming considerations for using the MfChar type. The type can be difficult to use, and strings are generally preferable for representing linguistic content.

A MfChar object does not always correspond to a single character. Although the MfChar type represents a single 16-bit value, some characters (such as grapheme clusters and surrogate pairs) consist of two or more UTF-16 code units.
The notion of a "character" is also flexible. A character is often thought of as a glyph, but many glyphs require multiple code points. For example, ä can be represented either by two code points ("a" plus U+0308, which is the combining diaeresis), or by a single code point ("ä" or U+00A4). Some languages have many letters, characters, and glyphs that require multiple code points, which can cause confusion in linguistic content representation. For example, there is a ΰ (U+03B0, Greek small letter upsilon with dialytika and tonos), but there is no equivalent capital letter. Uppercasing such a value simply retrieves the original value.