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UInt32.Parse Method (String)

Updated: May 2010

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

This API is not CLS-compliant. The CLS-compliant alternative is Parse(String).

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

public static uint Parse(
	string s


Type: System.String

A string that represents the number to convert.

Return Value

Type: System.UInt32
A 32-bit unsigned integer equivalent to the number contained in s.


The s parameter is null.


The s parameter is not of the correct format.


The s parameter represents a number that is less than MinValue or greater than MaxValue.

The s parameter should be the string representation of a number in the following form.


Elements in square brackets ([ and ]) are optional. The following table describes each element.




Optional white space.


An optional sign. Valid sign characters are determined by the NumberFormatInfo.NegativeSign and NumberFormatInfo.PositiveSign properties of the current culture. However, the negative sign symbol can be used only with zero; otherwise, the method throws an OverflowException.


A sequence of digits ranging from 0 to 9. Any leading zeros are ignored.


The string specified by the s parameter is interpreted by using the NumberStyles.Integer style. It cannot contain any group separators or decimal separator, and it cannot have a decimal portion.

The s parameter is parsed using the formatting information in a NumberFormatInfo object that is initialized for the current system culture. For more information, see NumberFormatInfo.CurrentInfo. To parse a string by using the formatting information of a specific culture, use the Parse(String, IFormatProvider) method.

The following example uses the Parse(String) method to parse an array of string values.

string[] values = { "+13230", "-0", "1,390,146", "$190,235,421,127",
                    "0xFA1B", "163042", "-10", "14065839182",
                    "16e07", "134985.0", "-12034" };
foreach (string value in values)
   try {
      uint number = UInt32.Parse(value); 
      Console.WriteLine("{0} --> {1}", value, number);
   catch (FormatException) {
      Console.WriteLine("{0}: Bad Format", value);
   catch (OverflowException) {
      Console.WriteLine("{0}: Overflow", value);   
// The example displays the following output: 
//       +13230 --> 13230 
//       -0 --> 0 
//       1,390,146: Bad Format 
//       $190,235,421,127: Bad Format 
//       0xFA1B: Bad Format 
//       163042 --> 163042 
//       -10: Overflow 
//       14065839182: Overflow 
//       16e07: Bad Format 
//       134985.0: Bad Format 
//       -12034: Overflow      

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




May 2010

Revised extensively.

Information enhancement.