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Int64.ToString Method (String)

Converts the numeric value of this instance to its equivalent string representation, using the specified format.

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

public string ToString(
	string format
)

Parameters

format
Type: System.String

A numeric format string.

Return Value

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

ExceptionCondition
FormatException

format is invalid or not supported.

The ToString(String) method formats an Int64 value in a specified format by using a NumberFormatInfo object that represents the conventions of the current culture. If you want to use the default ("G", or general) format or specify a different culture, use the other overloads of the ToString method, as follows:

To use format

For culture

Use the overload

Default ("G") format

Default (current) culture

ToString()

Default ("G") format

A specific culture

ToString(IFormatProvider)

A specific format

A specific culture

ToString(String, IFormatProvider)

The format parameter can be any valid standard numeric format specifier except for "R", as well as any combination of custom numeric format specifiers. If format is null or an empty string (""), the return value of this instance is formatted with the general numeric format specifier ("G").

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

The return value of this instance is formatted with the NumberFormatInfo for the current culture.

The following example displays an Int64 value using each of the supported standard numeric format specifiers together with two custom numeric format strings. In converting the numeric values to strings, the example uses the formatting conventions of the en-US culture.

long value = -16325;
string specifier;

// Use standard numeric format specifier.
specifier = "G";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    G: -16325
specifier = "C";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    C: ($16,325.00)
specifier = "D8";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    D8: -00016325
specifier = "E4";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    E4: -1.6325E+004
specifier = "e3";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    e3: -1.633e+004
specifier = "F";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    F: -16325.00
specifier = "N";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    N: -16,325.00
specifier = "P";
Console.WriteLine("{0}: {1}", specifier, (value/100000.0).ToString(specifier));
// Displays:    P: -16.33 %
specifier = "X";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    X: FFFFFFFFFFFFC03B  

// Use custom numeric format specifiers.
specifier = "0,0.000";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    0,0.000: -16,325.000
specifier = "#,#.00#;(#,#.00#)";
Console.WriteLine("{0}: {1}", specifier, (value*-1).ToString(specifier));
// Displays:    #,#.00#;(#,#.00#): 16,325.00

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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