CharUnicodeInfo::GetDecimalDigitValue Method (String^, Int32)
Gets the decimal digit value of the numeric character at the specified index of the specified string.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- s
-
Type:
System::String^
The String containing the Unicode character for which to get the decimal digit value.
- index
-
Type:
System::Int32
The index of the Unicode character for which to get the decimal digit value.
Return Value
Type: System::Int32The decimal digit value of the numeric character at the specified index of the specified string.
-or-
-1, if the character at the specified index of the specified string is not a decimal digit.
| Exception | Condition |
|---|---|
| ArgumentNullException | s is null. |
| ArgumentOutOfRangeException | index is outside the range of valid indexes in s. |
This method converts characters that represent decimal digits to their equivalent integral values. Decimal digits are characters in the DecimalDigitNumber category that can represent one of ten digits in the decimal (base 10) numbering system, from zero through nine. It includes characters such as U+0030 (DIGIT ZERO) through U+0039 (DIGIT NINE), U+0660 (ARABIC-INDIC DIGIT ZERO) through U+0669 (ARABIC-INDIC DIGIT NINE), U+07C0 (NKO DIGIT ZERO) through U+07C9 (NKO DIGIT NINE), and U+1040 (MYANMAR DIGIT ZERO) through U+1049 (MYANMAR DIGIT NINE).
For more information about Unicode characters, see the Unicode Standard.
The following code example shows the values returned by each method for different types of characters.
using namespace System; using namespace System::Globalization; int main() { // The String to get information for. String^ s = "a9\u0393\u00B2\u00BC\u0BEF\u0BF0\u2788"; Console::WriteLine( "String: {0}", s ); // Print the values for each of the characters in the string. Console::WriteLine( "index c Num Dig Dec UnicodeCategory" ); for ( int i = 0; i < s->Length; i++ ) { Console::Write( "{0,-5} {1,-3}", i, s[ i ] ); Console::Write( " {0,-5}", CharUnicodeInfo::GetNumericValue( s, i ) ); Console::Write( " {0,-5}", CharUnicodeInfo::GetDigitValue( s, i ) ); Console::Write( " {0,-5}", CharUnicodeInfo::GetDecimalDigitValue( s, i ) ); Console::WriteLine( "{0}", CharUnicodeInfo::GetUnicodeCategory( s, i ) ); } } /* This code produces the following output. Some characters might not display at the console. String: a9\u0393\u00B2\u00BC\u0BEF\u0BF0\u2788 index c Num Dig Dec UnicodeCategory 0 a -1 -1 -1 LowercaseLetter 1 9 9 9 9 DecimalDigitNumber 2 \u0393 -1 -1 -1 UppercaseLetter 3 \u00B2 2 2 2 OtherNumber 4 \u00BC 0.25 -1 -1 OtherNumber 5 \u0BEF 9 9 9 DecimalDigitNumber 6 \u0BF0 10 -1 -1 OtherNumber 7 \u2788 9 9 -1 OtherNumber */
Available since 2.0