NumberStyles

Determines the styles permitted in numeric string arguments that are passed to the Parse and TryParse methods of the integral and floating-point numeric types.

 Public Enum NumberStyles

Values

None = 0

Indicates that no style elements, such as leading or trailing white space, thousands separators, or a decimal separator, can be present in the parsed string. The string to be parsed must consist of integral decimal digits only.

AllowLeadingWhite = 1

Indicates that leading white-space characters can be present in the parsed string. Valid white-space characters have the Unicode values U+0009, U+000A, U+000B, U+000C, U+000D, and U+0020. Note that this is a subset of the characters for which the Char.IsWhiteSpace method returns true.

AllowTrailingWhite = 2

Indicates that trailing white-space characters can be present in the parsed string. Valid white-space characters have the Unicode values U+0009, U+000A, U+000B, U+000C, U+000D, and U+0020. Note that this is a subset of the characters for which the Char.IsWhiteSpace method returns true.

AllowLeadingSign = 4

Indicates that the numeric string can have a leading sign. Valid leading sign characters are determined by the NumberFormatInfo.PositiveSign and NumberFormatInfo.NegativeSign properties.

[Integer] = 7

Indicates that the AllowLeadingWhite, AllowTrailingWhite, and AllowLeadingSign styles are used. This is a composite number style.

AllowTrailingSign = 8

Indicates that the numeric string can have a trailing sign. Valid trailing sign characters are determined by the NumberFormatInfo.PositiveSign and NumberFormatInfo.NegativeSign properties.

AllowParentheses = 16

Indicates that the numeric string can have one pair of parentheses enclosing the number. The parentheses indicate that the string to be parsed represents a negative number.

AllowDecimalPoint = 32

Indicates that the numeric string can have a decimal point. If the NumberStyles value includes the AllowCurrencySymbol flag and the parsed string includes a currency symbol, the decimal separator character is determined by the NumberFormatInfo.CurrencyDecimalSeparator property. Otherwise, the decimal separator character is determined by the NumberFormatInfo.NumberDecimalSeparator property.

AllowThousands = 64

Indicates that the numeric string can have group separators, such as symbols that separate hundreds from thousands. If the NumberStyles value includes the AllowCurrencySymbol flag and the string to be parsed includes a currency symbol, the valid group separator character is determined by the NumberFormatInfo.CurrencyGroupSeparator property, and the number of digits in each group is determined by the NumberFormatInfo.CurrencyGroupSizes property. Otherwise, the valid group separator character is determined by the NumberFormatInfo.NumberGroupSeparator property, and the number of digits in each group is determined by the NumberFormatInfo.NumberGroupSizes property.

Number = 111

Indicates that the AllowLeadingWhite, AllowTrailingWhite, AllowLeadingSign, AllowTrailingSign, AllowDecimalPoint, and AllowThousands styles are used. This is a composite number style.

AllowExponent = 128

Indicates that the numeric string can be in exponential notation. The AllowExponent flag allows the parsed string to contain an exponent that begins with the "E" or "e" character and that is followed by an optional positive or negative sign and an integer. In other words, it successfully parses strings in the form nnnExx, nnnE+xx, and nnnE-xx. It does not allow a decimal separator or sign in the significand or mantissa; to allow these elements in the string to be parsed, use the AllowDecimalPoint and AllowLeadingSign flags, or use a composite style that includes these individual flags.

Float = 167

Indicates that the AllowLeadingWhite, AllowTrailingWhite, AllowLeadingSign, AllowDecimalPoint, and AllowExponent styles are used. This is a composite number style.

AllowCurrencySymbol = 256

Indicates that the numeric string can contain a currency symbol. Valid currency symbols are determined by the NumberFormatInfo.CurrencySymbol property.

[Currency] = 383

Indicates that all styles except AllowExponent and AllowHexSpecifier are used. This is a composite number style.

[Any] = 511

Indicates that all styles except AllowHexSpecifier are used. This is a composite number style.

AllowHexSpecifier = 512

Indicates that the numeric string represents a hexadecimal value. Valid hexadecimal values include the numeric digits 0-9 and the hexadecimal digits A-F and a-f. Strings that are parsed using this style cannot be prefixed with "0x" or "&h". A string that is parsed with the AllowHexSpecifier style will always be interpreted as a hexadecimal value. The only flags that can be combined with AllowHexSpecifier are AllowLeadingWhite and AllowTrailingWhite. The NumberStyles enumeration includes a composite style, HexNumber, that consists of these three flags.

HexNumber = 515

Indicates that the AllowLeadingWhite, AllowTrailingWhite, and AllowHexSpecifier styles are used. This is a composite number style.

See Also

Project CorLib Overview

Class NumberFormatInfoStatic Overview