Converts the string representation of a number in a specified style and culture-specific format to its 32-bit signed integer equivalent.
Assembly: mscorlib (in mscorlib.dll)
Public Shared Function Parse ( _
s As String, _
style As NumberStyles, _
provider As IFormatProvider _
) As Integerpublic static int Parse(
string s,
NumberStyles style,
IFormatProvider provider
)public:
static int Parse(
String^ s,
NumberStyles style,
IFormatProvider^ provider
)static member Parse :
s:string *
style:NumberStyles *
provider:IFormatProvider -> int
Parameters
- s
- Type: System
. . :: . String
A string containing a number to convert.
- style
- Type: System.Globalization
. . :: . NumberStyles
A bitwise combination of enumeration values that indicates the style elements that can be present in s. A typical value to specify is Integer.
- provider
- Type: System
. . :: . IFormatProvider
An object that supplies culture-specific information about the format of s.
| Exception | Condition |
|---|---|
| ArgumentNullException | s is |
| ArgumentException | style is not a NumberStyles value. -or- style is not a combination of AllowHexSpecifier and HexNumber values. |
| FormatException | s is not in a format compliant with style. |
| OverflowException | s represents a number less than MinValue or greater than MaxValue. -or- s includes non-zero, fractional digits. |
The style parameter defines the style elements (such as white space or the positive sign) that are allowed in the s parameter for the parse operation to succeed. It must be a combination of bit flags from the NumberStyles enumeration. Depending on the value of style, the s parameter may include the following elements:
[ws][$][sign][digits,]digits[.fractional_digist][e[sign]exponential_digits][ws]
Or, if style includes AllowHexSpecifier:
[ws]hexdigits[ws]
Items in square brackets ([ and ]) are optional. The following table describes each element.
Element | Description |
|---|---|
ws | Optional white space. White space can appear at the beginning of s if style includes the NumberStyles |
$ | A culture-specific currency symbol. Its position in the string is defined by the NumberFormatInfo |
sign | An optional sign. The sign can appear at the beginning of s if style includes the NumberStyles |
digits fractional_digits exponential_digits | A sequence of digits from 0 through 9. For fractional_digits, only the digit 0 is valid. |
, | A culture-specific thousands separator symbol. The thousands separator of the culture specified by provider can appear in s if style includes the NumberStyles |
. | A culture-specific decimal point symbol. The decimal point symbol of the culture specified by provider can appear in s if style includes the NumberStyles Only the digit 0 can appear as a fractional digit for the parse operation to succeed; if fractional_digits includes any other digit, an OverflowException is thrown. |
e | The 'e' or 'E' character, which indicates that the value is represented in exponential notation. The s parameter can represent a number in exponential notation if style includes the NumberStyles |
hexdigits | A sequence of hexadecimal digits from 0 through f, or 0 through F. |
A string with decimal digits only (which corresponds to the NumberStyles
Non-composite NumberStyles values | Elements permitted in s in addition to digits |
|---|---|
Decimal digits only. | |
The decimal point ( . ) and fractional-digits elements. However, fractional-digits must consist of only one or more 0 digits or an OverflowException is thrown. | |
The s parameter can also use exponential notation. If s represents a number in exponential notation, it must represent an integer within the range of the Int32 data type without a non-zero, fractional component. | |
The ws element at the beginning of s. | |
The ws element at the end of s. | |
A positive sign can appear before digits. | |
A positive sign can appear after digits. | |
The sign element in the form of parentheses enclosing the numeric value. | |
The thousands separator ( , ) element. | |
The $ element. |
If the NumberStyles
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
The following example uses a variety of style and provider parameters to parse the string representations of Int32 values. It also illustrates some of the different ways the same string can be interpreted depending on the culture whose formatting information is used for the parsing operation.
Imports System.Globalization
Module ParseInt32
Public Sub Main()
Convert("12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("en-GB"))
Convert("12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("fr-FR"))
Convert("12,000", NumberStyles.Float, New CultureInfo("en-US"))
Convert("12 425,00", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("sv-SE"))
Convert("12,425.00", NumberStyles.Float Or NumberStyles.AllowThousands, _
NumberFormatInfo.InvariantInfo)
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
New CultureInfo("fr-FR"))
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
New CultureInfo("en-US"))
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowThousands, _
New CultureInfo("en-US"))
End Sub
Private Sub Convert(value As String, style As NumberStyles, _
provider As IFormatProvider)
Try
Dim number As Integer = Int32.Parse(value, style, provider)
Console.WriteLine("Converted '{0}' to {1}.", value, number)
Catch e As FormatException
Console.WriteLine("Unable to convert '{0}'.", value)
Catch e As OverflowException
Console.WriteLine("'{0}' is out of range of the Int32 type.", value)
End Try
End Sub
End Module
' This example displays the following output to the console:
' Converted '12,000' to 12000.
' Converted '12,000' to 12.
' Unable to convert '12,000'.
' Converted '12 425,00' to 12425.
' Converted '12,425.00' to 12425.
' '631,900' is out of range of the Int32 type.
' Unable to convert '631,900'.
' Converted '631,900' to 631900.
using System;
using System.Globalization;
public class ParseInt32
{
public static void Main()
{
Convert("12,000", NumberStyles.Float | NumberStyles.AllowThousands,
new CultureInfo("en-GB"));
Convert("12,000", NumberStyles.Float | NumberStyles.AllowThousands,
new CultureInfo("fr-FR"));
Convert("12,000", NumberStyles.Float, new CultureInfo("en-US"));
Convert("12 425,00", NumberStyles.Float | NumberStyles.AllowThousands,
new CultureInfo("sv-SE"));
Convert("12,425.00", NumberStyles.Float | NumberStyles.AllowThousands,
NumberFormatInfo.InvariantInfo);
Convert("631,900", NumberStyles.Integer | NumberStyles.AllowDecimalPoint,
new CultureInfo("fr-FR"));
Convert("631,900", NumberStyles.Integer | NumberStyles.AllowDecimalPoint,
new CultureInfo("en-US"));
Convert("631,900", NumberStyles.Integer | NumberStyles.AllowThousands,
new CultureInfo("en-US"));
}
private static void Convert(string value, NumberStyles style,
IFormatProvider provider)
{
try
{
int number = Int32.Parse(value, style, provider);
Console.WriteLine("Converted '{0}' to {1}.", value, number);
}
catch (FormatException)
{
Console.WriteLine("Unable to convert '{0}'.", value);
}
catch (OverflowException)
{
Console.WriteLine("'{0}' is out of range of the Int32 type.", value);
}
}
}
// This example displays the following output to the console:
// Converted '12,000' to 12000.
// Converted '12,000' to 12.
// Unable to convert '12,000'.
// Converted '12 425,00' to 12425.
// Converted '12,425.00' to 12425.
// '631,900' is out of range of the Int32 type.
// Unable to convert '631,900'.
// Converted '631,900' to 631900.
using namespace System;
using namespace System::Globalization;
public ref class ParseInt32
{
public:
static void Main()
{
Convert("12,000", NumberStyles::Float | NumberStyles::AllowThousands,
gcnew CultureInfo("en-GB"));
Convert("12,000", NumberStyles::Float | NumberStyles::AllowThousands,
gcnew CultureInfo("fr-FR"));
Convert("12,000", NumberStyles::Float, gcnew CultureInfo("en-US"));
Convert("12 425,00", NumberStyles::Float | NumberStyles::AllowThousands,
gcnew CultureInfo("sv-SE"));
Convert("12,425.00", NumberStyles::Float | NumberStyles::AllowThousands,
NumberFormatInfo::InvariantInfo);
Convert("631,900", NumberStyles::Integer | NumberStyles::AllowDecimalPoint,
gcnew CultureInfo("fr-FR"));
Convert("631,900", NumberStyles::Integer | NumberStyles::AllowDecimalPoint,
gcnew CultureInfo("en-US"));
Convert("631,900", NumberStyles::Integer | NumberStyles::AllowThousands,
gcnew CultureInfo("en-US"));
}
private:
static void Convert(String^ value, NumberStyles style,
IFormatProvider^ provider)
{
try
{
int number = Int32::Parse(value, style, provider);
Console::WriteLine("Converted '{0}' to {1}.", value, number);
}
catch (FormatException^)
{
Console::WriteLine("Unable to convert '{0}'.", value);
}
catch (OverflowException^)
{
Console::WriteLine("'{0}' is out of range of the Int32 type.", value);
}
}
};
int main()
{
ParseInt32::Main();
}
// This example displays the following output to the console:
// Converted '12,000' to 12000.
// Converted '12,000' to 12.
// Unable to convert '12,000'.
// Converted '12 425,00' to 12425.
// Converted '12,425.00' to 12425.
// '631,900' is out of range of the Int32 type.
// Unable to convert '631,900'.
// Converted '631,900' to 631900.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.