Int32.ToString Method (String, IFormatProvider)

Converts the numeric value of this instance to its equivalent string representation using the specified format and culture-specific format information.

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

<SecuritySafeCriticalAttribute> _
Public Function ToString ( _
	format As String, _
	provider As IFormatProvider _
) As String


Type: System.String
A standard or custom numeric format string (see Remarks).
Type: System.IFormatProvider
An IFormatProvider that supplies culture-specific formatting information.

Return Value

Type: System.String
The string representation of the value of this instance as specified by format and provider.


IFormattable.ToString(String, IFormatProvider)


format is invalid or not supported.

The format parameter can be either a standard or a custom numeric format string. All standard numeric format strings other than "R" (or "r") are supported, as are all custom numeric format characters. If format is Nothing or an empty string (""), the return value for this instance is formatted with the general numeric format specifier ("G").

The provider parameter is an object that implements the IFormatProvider interface. Its GetFormat method returns a NumberFormatInfo object that provides culture-specific format information about the format of the string that is returned by this method. The object that implements IFormatProvider can be any of the following:

If provider is Nothing or a NumberFormatInfo object cannot be obtained from provider, the return value for this instance is formatted with the NumberFormatInfo for the current culture.

The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics:

The following example displays a positive and a negative value using each of the supported standard numeric format specifiers for three different cultures.

' Define cultures whose formatting conventions are to be used.
Dim cultures() As CultureInfo = {New CultureInfo("en-US"), _
                                 New CultureInfo("fr-FR"), _
                                 New CultureInfo("es-ES")}
Dim positiveNumber As Integer = 1679
Dim negativeNumber As Integer = -3045
Dim specifiers() As String = {"G", "C", "D8", "E2", "F", "N", "P", "X8"}

For Each specifier As String In specifiers
   For Each culture As CultureInfo In cultures
      ' Display values with "G" format specifier.
      outputBlock.Text += String.Format("{0} format using {1} culture: {2, 16} {3, 16}", _
                        specifier, culture.Name, _
                        positiveNumber.ToString(specifier, culture), _
                        negativeNumber.ToString(specifier, culture)) & vbCrLf

   outputBlock.Text &= vbCrLf
' The example displays the following output:
'       G format using en-US culture:             1679            -3045
'       G format using fr-FR culture:             1679            -3045
'       G format using es-ES culture:             1679            -3045
'       C format using en-US culture:        $1,679.00      ($3,045.00)
'       C format using fr-FR culture:       1 679,00 €      -3 045,00 €
'       C format using es-ES culture:       1.679,00 €      -3.045,00 €
'       D8 format using en-US culture:         00001679        -00003045
'       D8 format using fr-FR culture:         00001679        -00003045
'       D8 format using es-ES culture:         00001679        -00003045
'       E2 format using en-US culture:        1.68E+003       -3.05E+003
'       E2 format using fr-FR culture:        1,68E+003       -3,05E+003
'       E2 format using es-ES culture:        1,68E+003       -3,05E+003
'       F format using en-US culture:          1679.00         -3045.00
'       F format using fr-FR culture:          1679,00         -3045,00
'       F format using es-ES culture:          1679,00         -3045,00
'       N format using en-US culture:         1,679.00        -3,045.00
'       N format using fr-FR culture:         1 679,00        -3 045,00
'       N format using es-ES culture:         1.679,00        -3.045,00
'       P format using en-US culture:     167,900.00 %    -304,500.00 %
'       P format using fr-FR culture:     167 900,00 %    -304 500,00 %
'       P format using es-ES culture:     167.900,00 %    -304.500,00 %
'       X8 format using en-US culture:         0000068F         FFFFF41B
'       X8 format using fr-FR culture:         0000068F         FFFFF41B
'       X8 format using es-ES culture:         0000068F         FFFFF41B


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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