Int32::Parse Method (String^, IFormatProvider^)
Converts the string representation of a number in a specified culture-specific format to its 32-bit signed integer equivalent.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- s
-
Type:
System::String^
A string containing a number to convert.
- provider
-
Type:
System::IFormatProvider^
An object that supplies culture-specific formatting information about s.
| Exception | Condition |
|---|---|
| ArgumentNullException | s is null. |
| FormatException | s is not of the correct format. |
| OverflowException |
This overload of the Parse(String^, IFormatProvider^) method is typically used to convert text that can be formatted in a variety of ways to an Int32 value. For example, it can be used to convert the text entered by a user into an HTML text box to a numeric value.
The s parameter contains a number of the form:
[ws][sign]digits[ws]
Items in square brackets ([ and ]) are optional. The following table describes each element.
Element | Description |
|---|---|
ws | Optional white space. |
sign | An optional sign. |
digits | A sequence of digits ranging from 0 to 9. |
The s parameter is interpreted using the NumberStyles::Integer style. In addition to decimal digits, only leading and trailing spaces together with a leading sign are allowed. To explicitly define the style elements that can be present in s, use the Int32::Parse(String^, NumberStyles, IFormatProvider^) method.
The provider parameter is an IFormatProvider implementation, such as a NumberFormatInfo or CultureInfo object. The provider parameter supplies culture-specific information about the format of s. If provider is null, the NumberFormatInfo object for the current culture is used.
The following example is the button click event handler of a Web form. It uses the array returned by the HttpRequest::UserLanguages property to determine the user's locale. It then instantiates a CultureInfo object that corresponds to that locale. The NumberFormatInfo object that belongs to that CultureInfo object is then passed to the Parse(String^, IFormatProvider^) method to convert the user's input to an Int32 value.
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1