Int64.Parse Method (String, IFormatProvider)
Converts the string representation of a number in a specified culture-specific format to its 64-bit signed integer equivalent.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.String
A string containing a number to convert.
- Type: System.IFormatProvider
An object that supplies culture-specific formatting information about s.
Return ValueType: System.Int64
A 64-bit signed integer equivalent to the number specified in s.
This overload of the method is typically used to convert text that can be formatted in a variety of ways to an Int64 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:
Items in square brackets ([ and ]) are optional, and other items are as follows.
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 Int64.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 a null reference (Nothing in Visual Basic), the NumberFormatInfo 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 method to convert the user's input to an Int64 value.
.NET FrameworkSupported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.