Converts the string representation of a number to its 32-bit signed integer equivalent.
(in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function Parse ( _
s As String _
) As Integer
Dim s As String
Dim returnValue As Integer
returnValue = Integer.Parse(s)
public static int Parse(
string s
)
public:
static int Parse(
String^ s
)
public static function Parse(
s : String
) : int
Return Value
Type:
System..::.Int32A 32-bit signed integer equivalent to the number contained in s.
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 either the Int32..::.Parse(String, NumberStyles) or the Int32..::.Parse(String, NumberStyles, IFormatProvider) method.
The s parameter is parsed using the formatting information in a NumberFormatInfo object initialized for the current system culture. For more information, see CurrentInfo. To parse a string using the formatting information of some other culture, use the Int32..::.Parse(String, NumberStyles, IFormatProvider) method.
The following example demonstrates how to convert a string value into a 32-bit signed integer value using the Int32..::.Parse(String) method. The resulting integer value is then displayed to the console.
Module ParseInt32
Public Sub Main()
Convert(" 179 ")
Convert(" -204 ")
Convert(" +809 ")
Convert(" 178.3")
End Sub
Private Sub Convert(value As String)
Try
Dim number As Integer = Int32.Parse(value)
Console.WriteLine("Converted '{0}' to {1}.", value, number)
Catch e As FormatException
Console.WriteLine("Unable to convert '{0}'.", value)
End Try
End Sub
End Module
' This example displays the following output to the console:
' Converted ' 179 ' to 179.
' Converted ' -204 ' to -204.
' Converted ' +809 ' to 809.
' Unable to convert ' 178.3'.
using System;
public class ParseInt32
{
public static void Main()
{
Convert(" 179 ");
Convert(" -204 ");
Convert(" +809 ");
Convert(" 178.3");
}
private static void Convert(string value)
{
try
{
int number = Int32.Parse(value);
Console.WriteLine("Converted '{0}' to {1}.", value, number);
}
catch (FormatException)
{
Console.WriteLine("Unable to convert '{0}'.", value);
}
}
}
// This example displays the following output to the console:
// Converted ' 179 ' to 179.
// Converted ' -204 ' to -204.
// Converted ' +809 ' to 809.
// Unable to convert ' 178.3'.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
XNA Framework
Supported in: 3.0, 2.0, 1.0
Reference
Other Resources