Int32.Parse Method (String)

Converts the string representation of a number to its 32-bit signed integer equivalent.

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

public static int Parse(
	string s
)

Parameters

s
Type: System.String
A string containing a number to convert.

Return Value

Type: System.Int32
A 32-bit signed integer equivalent to the number contained in s.

ExceptionCondition
ArgumentNullException

s is null.

FormatException

s is not in the correct format.

OverflowException

s represents a number less than MinValue or greater than MaxValue.

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.


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'.


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft