Decimal::TryParse Method (String^, NumberStyles, IFormatProvider^, Decimal%)


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Converts the string representation of a number to its Decimal equivalent using the specified style and culture-specific format. A return value indicates whether the conversion succeeded or failed.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

static bool TryParse(
	String^ s,
	NumberStyles style,
	IFormatProvider^ provider,
	[OutAttribute] Decimal% result


Type: System::String^

The string representation of the number to convert.

Type: System.Globalization::NumberStyles

A bitwise combination of enumeration values that indicates the permitted format of s. A typical value to specify is Number.

Type: System::IFormatProvider^

An object that supplies culture-specific parsing information about s.

Type: System::Decimal%

When this method returns, contains the Decimal number that is equivalent to the numeric value contained in s, if the conversion succeeded, or is zero if the conversion failed. The conversion fails if the s parameter is null or String::Empty, is not in a format compliant with style, or represents a number less than MinValue or greater than MaxValue. This parameter is passed uninitialized; any value originally supplied in result will be overwritten.

Return Value

Type: System::Boolean

true if s was converted successfully; otherwise, false.

Exception Condition

style is not a NumberStyles value.


style is the AllowHexSpecifier value.

This overload differs from the Decimal::Parse(String^, NumberStyles, IFormatProvider^) method by returning a Boolean value that indicates whether the parse operation succeeded instead of returning the parsed numeric value. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.

The style parameter defines the allowable format of the s parameter for the parse operation to succeed. It must be a combination of bit flags from the NumberStyles enumeration. The following NumberStyles members are not supported:

Depending on the value of style, the s parameter may include the following elements:


Elements in square brackets ([ and ]) are optional. The following table describes each element.




Optional white space. White space can appear at the beginning of s if style includes the NumberStyles::AllowLeadingWhite flag. It can appear at the end of s if style includes the NumberStyles::AllowTrailingWhite flag.


A culture-specific currency symbol. Its position in the string is defined by the NumberFormatInfo::CurrencyNegativePattern or NumberFormatInfo::CurrencyPositivePattern properties of the NumberFormatInfo object returned by the IFormatProvider::GetFormat method of the provider parameter. The currency symbol can appear in s if style includes the NumberStyles::AllowCurrencySymbol flag.


An optional sign.


A sequence of digits ranging from 0 to 9.


A culture-specific decimal point symbol.


A sequence of digits ranging from 0 to 9.

The style parameter specifies the permitted format of the s parameter, and can be one or more NumberStyles enumerated constants combined using a bitwise OR operation. If style is null, s is interpreted using the NumberStyles::Number style.

The provider parameter is an IFormatProvider implementation such as a NumberFormatInfo or CultureInfo object. The provider parameter supplies culture-specific information used in parsing. If provider is null, the thread current culture is used.

A Decimal object has 29 digits of precision. If s represents a number that has more than 29 digits, but has a fractional part and is within the range of MaxValue and MinValue, the number is rounded, not truncated, to 29 digits using rounding to nearest.

If a separator is encountered in the s parameter during a parse operation, and the applicable currency or number decimal and group separators are the same, the parse operation assumes that the separator is a decimal separator rather than a group separator. For more information about separators, see CurrencyDecimalSeparator, NumberDecimalSeparator, CurrencyGroupSeparator, and NumberGroupSeparator.

The following example demonstrates the use of the TryParse(String^, NumberStyles, IFormatProvider^, Decimal%) method to parse the string representation of a number that has a particular style and is formatted using the conventions of a particular culture.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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