Converts the numeric value of this instance to its equivalent string representation using the specified format and culture-specific format information.
public:
virtual System::String ^ ToString(System::String ^ format, IFormatProvider ^ provider);
public string ToString(string format, IFormatProvider provider);
public string ToString(string? format, IFormatProvider? provider);
override this.ToString : string * IFormatProvider -> string
Public Function ToString (format As String, provider As IFormatProvider) As String
Parameters
A numeric format string.
An object that supplies culture-specific formatting information about this instance.
ReturnsThe string representation of the value of this instance as specified by format
and provider
.
format
is invalid or not supported.
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.
CultureInfo[] cultures = {CultureInfo.CreateSpecificCulture("en-US"),
CultureInfo.CreateSpecificCulture("fr-FR"),
CultureInfo.CreateSpecificCulture("es-ES") };
long positiveNumber = 1679;
long negativeNumber = -3045;
string[] specifiers = {"G", "C", "D8", "E2", "F", "N", "N0", "P", "X8"};
foreach (string specifier in specifiers)
{
foreach (CultureInfo culture in cultures)
{
// Display values with "G" format specifier.
Console.WriteLine("{0} format using {1} culture: {2, 16} {3, 16}",
specifier, culture.Name,
positiveNumber.ToString(specifier, culture),
negativeNumber.ToString(specifier, culture));
}
Console.WriteLine();
}
// The example displays the following output to the console:
// 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 â¬
// C format using es-ES culture: 1.679,00 ⬠-3.045,00 â¬
//
// 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
//
// N0 format using en-US culture: 1,679 -3,045
// N0 format using fr-FR culture: 1 679 -3 045
// N0 format using es-ES culture: 1.679 -3.045
//
// 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 FFFFFFFFFFFFF41B
// X8 format using fr-FR culture: 0000068F FFFFFFFFFFFFF41B
// X8 format using es-ES culture: 0000068F FFFFFFFFFFFFF41B
// Define cultures whose formatting conventions are to be used.
let cultures =
[| CultureInfo.CreateSpecificCulture "en-US"
CultureInfo.CreateSpecificCulture "fr-FR"
CultureInfo.CreateSpecificCulture "es-ES" |]
let positiveNumber = 1679L
let negativeNumber = -3045L
let specifiers = [| "G"; "C"; "D8"; "E2"; "F"; "N"; "N0"; "P"; "X8" |]
for specifier in specifiers do
for culture in cultures do
// Display values with "G" format specifier.
printfn $"{specifier} format using {culture.Name} culture: {positiveNumber.ToString(specifier, culture), 16} {negativeNumber.ToString(specifier, culture), 16}"
printfn ""
// The example displays the following output to the console:
// 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 â¬
// C format using es-ES culture: 1.679,00 ⬠-3.045,00 â¬
//
// 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
//
// N0 format using en-US culture: 1,679 -3,045
// N0 format using fr-FR culture: 1 679 -3 045
// N0 format using es-ES culture: 1.679 -3.045
//
// 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 FFFFFFFFFFFFF41B
// X8 format using fr-FR culture: 0000068F FFFFFFFFFFFFF41B
// X8 format using es-ES culture: 0000068F FFFFFFFFFFFFF41B
' Define cultures whose formatting conventions are to be used.
Dim cultures() As CultureInfo = {CultureInfo.CreateSpecificCulture("en-US"), _
CultureInfo.CreateSpecificCulture("fr-FR"), _
CultureInfo.CreateSpecificCulture("es-ES") }
Dim positiveNumber As Long = 1679
Dim negativeNumber As Long = -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.
Console.WriteLine("{0} format using {1} culture: {2, 16} {3, 16}", _
specifier, culture.Name, _
positiveNumber.ToString(specifier, culture), _
negativeNumber.ToString(specifier, culture))
Next
Console.WriteLine()
Next
' The example displays the following output to the console:
'
' 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 â¬
' C format using es-ES culture: 1.679,00 ⬠-3.045,00 â¬
'
' 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 FFFFFFFFFFFFF41B
' X8 format using fr-FR culture: 0000068F FFFFFFFFFFFFF41B
' X8 format using es-ES culture: 0000068F FFFFFFFFFFFFF41B
Remarks
The ToString(String, IFormatProvider) method formats an Int64 value in a specified format by using the NumberFormatInfo object of a specified culture. If you want to use default format or culture settings, use the other overloads of the ToString method, as follows:
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 null
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 information about the format of the string that is returned by this method. The object that implements IFormatProvider can be any of the following:
A CultureInfo object that represents the culture whose formatting rules are to be used.
A NumberFormatInfo object that contains specific numeric formatting information for this value.
A custom object that implements IFormatProvider and whose GetFormat method returns a NumberFormatInfo object that provides formatting information.
If provider
is null
or a NumberFormatInfo object cannot be obtained from provider
, the return value for this instance is formatted with the NumberFormatInfo for the current culture.
.NET provides extensive formatting support, which is described in greater detail in the following formatting topics:
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about formatting, see Formatting Types.
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