Int32.Parse Method (String, NumberStyles)

Parameters

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

• style
  Type: System.Globalization.NumberStyles
  A bitwise combination of the enumeration values that indicates the style elements that can be present in s. A typical value to specify is Integer.

Return Value

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

Imports System.Globalization

Module Example
   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Convert(outputBlock, "104.0", NumberStyles.AllowDecimalPoint)
      Convert(outputBlock, "104.9", NumberStyles.AllowDecimalPoint)
      Convert(outputBlock, " $17,198,064.42", NumberStyles.AllowCurrencySymbol Or _
                                 NumberStyles.Number)
      Convert(outputBlock, "103E06", NumberStyles.AllowExponent)
      Convert(outputBlock, "-1,345,791", NumberStyles.AllowThousands)
      Convert(outputBlock, "(1,345,791)", NumberStyles.AllowThousands Or _
                             NumberStyles.AllowParentheses)
   End Sub

   Private Sub Convert(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal value As String, ByVal style As NumberStyles)
      Try
         Dim number As Integer = Int32.Parse(value, style)
         outputBlock.Text += String.Format("Converted '{0}' to {1}.", value, number) & vbCrLf
      Catch e As FormatException
         outputBlock.Text += String.Format("Unable to convert '{0}'.", value) & vbCrLf
      Catch e As OverflowException
         outputBlock.Text += String.Format("'{0}' is out of range of the Int32 type.", value) & vbCrLf
      End Try
   End Sub
End Module
' The example displays the following output:
'       Converted '104.0' to 104.
'       '104.9' is out of range of the Int32 type.
'       ' $17,198,064.42' is out of range of the Int32 type.
'       Converted '103E06' to 103000000.
'       Unable to convert '-1,345,791'.
'       Converted '(1,345,791)' to -1345791.

using System;
using System.Globalization;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      Convert(outputBlock, "104.0", NumberStyles.AllowDecimalPoint);
      Convert(outputBlock, "104.9", NumberStyles.AllowDecimalPoint);
      Convert(outputBlock, " $17,198,064.42", NumberStyles.AllowCurrencySymbol |
                                 NumberStyles.Number);
      Convert(outputBlock, "103E06", NumberStyles.AllowExponent);
      Convert(outputBlock, "-1,345,791", NumberStyles.AllowThousands);
      Convert(outputBlock, "(1,345,791)", NumberStyles.AllowThousands |
                             NumberStyles.AllowParentheses);
   }

   private static void Convert(System.Windows.Controls.TextBlock outputBlock, string value, NumberStyles style)
   {
      try
      {
         int number = Int32.Parse(value, style);
         outputBlock.Text += String.Format("Converted '{0}' to {1}.", value, number) + "\n";
      }
      catch (FormatException)
      {
         outputBlock.Text += String.Format("Unable to convert '{0}'.", value) + "\n";
      }
      catch (OverflowException)
      {
         outputBlock.Text += String.Format("'{0}' is out of range of the Int32 type.", value) + "\n";
      }
   }
}
// The example displays the following output:
//       Converted '104.0' to 104.
//       '104.9' is out of range of the Int32 type.
//       ' $17,198,064.42' is out of range of the Int32 type.
//       Converted '103E06' to 103000000.
//       Unable to convert '-1,345,791'.
//       Converted '(1,345,791)' to -1345791.