Int32.Parse Method (String, NumberStyles, IFormatProvider)

Parameters

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

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

• provider
  Type: System.IFormatProvider
  An IFormatProvider that supplies culture-specific information about the format of s.

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, "12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
              New CultureInfo("en-GB"))
      Convert(outputBlock, "12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
              New CultureInfo("fr-FR"))
      Convert(outputBlock, "12,000", NumberStyles.Float, New CultureInfo("en-US"))

      Convert(outputBlock, "12 425,00", NumberStyles.Float Or NumberStyles.AllowThousands, _
              New CultureInfo("sv-SE"))
      Convert(outputBlock, "12,425.00", NumberStyles.Float Or NumberStyles.AllowThousands, _
              NumberFormatInfo.InvariantInfo)
      Convert(outputBlock, "631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
              New CultureInfo("fr-FR"))
      Convert(outputBlock, "631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
              New CultureInfo("en-US"))
      Convert(outputBlock, "631,900", NumberStyles.Integer Or NumberStyles.AllowThousands, _
              New CultureInfo("en-US"))
   End Sub

   Private Sub Convert(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal value As String, ByVal style As NumberStyles, _
                       ByVal provider As IFormatProvider)
      Try
         Dim number As Integer = Int32.Parse(value, style, provider)
         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
' This example displays the following output:
'       Converted '12,000' to 12000.
'       Converted '12,000' to 12.
'       Unable to convert '12,000'.
'       Converted '12 425,00' to 12425.
'       Converted '12,425.00' to 12425.
'       '631,900' is out of range of the Int32 type.
'       Unable to convert '631,900'.
'       Converted '631,900' to 631900.

using System;
using System.Globalization;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      Convert(outputBlock, "12,000", NumberStyles.Float | NumberStyles.AllowThousands,
              new CultureInfo("en-GB"));
      Convert(outputBlock, "12,000", NumberStyles.Float | NumberStyles.AllowThousands,
              new CultureInfo("fr-FR"));
      Convert(outputBlock, "12,000", NumberStyles.Float, new CultureInfo("en-US"));

      Convert(outputBlock, "12 425,00", NumberStyles.Float | NumberStyles.AllowThousands,
              new CultureInfo("sv-SE"));
      Convert(outputBlock, "12,425.00", NumberStyles.Float | NumberStyles.AllowThousands,
              NumberFormatInfo.InvariantInfo);
      Convert(outputBlock, "631,900", NumberStyles.Integer | NumberStyles.AllowDecimalPoint,
              new CultureInfo("fr-FR"));
      Convert(outputBlock, "631,900", NumberStyles.Integer | NumberStyles.AllowDecimalPoint,
              new CultureInfo("en-US"));
      Convert(outputBlock, "631,900", NumberStyles.Integer | NumberStyles.AllowThousands,
              new CultureInfo("en-US"));
   }

   private static void Convert(System.Windows.Controls.TextBlock outputBlock, string value, NumberStyles style,
                               IFormatProvider provider)
   {
      try
      {
         int number = Int32.Parse(value, style, provider);
         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";
      }
   }
}
// This example displays the following output:
//       Converted '12,000' to 12000.
//       Converted '12,000' to 12.
//       Unable to convert '12,000'.
//       Converted '12 425,00' to 12425.
//       Converted '12,425.00' to 12425.
//       '631,900' is out of range of the Int32 type.
//       Unable to convert '631,900'.
//       Converted '631,900' to 631900.