Int32.ToString Method (String)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

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

Syntax

Public Function ToString ( _
    format As String _
) As String
public string ToString(
    string format
)

Parameters

  • format
    Type: System..::.String
    A standard or custom numeric format string (see Remarks).

Return Value

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

Exceptions

Exception Condition
FormatException

format is invalid or not supported.

Remarks

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 nullNothingnullptra null reference (Nothing in Visual Basic) 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.

Examples

The following example displays an Int32 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.

Dim value As Integer = -16325
Dim specifier As String

' Use standard numeric format specifier.
specifier = "G"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    G: -16325
specifier = "C"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    C: ($16,325.00)
specifier = "D8"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    D8: -00016325
specifier = "E4"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    E4: -1.6325E+004
specifier = "e3"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    e3: -1.633e+004
specifier = "F"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    F: -16325.00
specifier = "N"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    N: -16,325.00
specifier = "P"
outputBlock.Text += String.Format("{0}: {1}", specifier, (value / 100000).ToString(specifier)) & vbCrLf
' Displays:    P: -16.33 %
specifier = "X"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    X: FFFFC03B 

' Use custom numeric format specifiers.
specifier = "0,0.000"
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) & vbCrLf
' Displays:    0,0.000: -16,325.000
specifier = "#,#.00#;(#,#.00#)"
outputBlock.Text += String.Format("{0}: {1}", specifier, (value * -1).ToString(specifier)) & vbCrLf
' Displays:    #,#.00#;(#,#.00#): 16,325.00
int value = -16325;
string specifier;

// Use standard numeric format specifier.
specifier = "G";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    G: -16325
specifier = "C";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    C: ($16,325.00)
specifier = "D8";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    D8: -00016325
specifier = "E4";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    E4: -1.6325E+004
specifier = "e3";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    e3: -1.633e+004
specifier = "F";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    F: -16325.00
specifier = "N";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    N: -16,325.00
specifier = "P";
outputBlock.Text += String.Format("{0}: {1}", specifier, (value / 100000).ToString(specifier)) + "\n";
// Displays:    P: -16.33 %
specifier = "X";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    X: FFFFC03B 

// Use custom numeric format specifiers.
specifier = "0,0.000";
outputBlock.Text += String.Format("{0}: {1}", specifier, value.ToString(specifier)) + "\n";
// Displays:    0,0.000: -16,325.000
specifier = "#,#.00#;(#,#.00#)";
outputBlock.Text += String.Format("{0}: {1}", specifier, (value * -1).ToString(specifier)) + "\n";
// Displays:    #,#.00#;(#,#.00#): 16,325.00

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Int32 Structure

ToString Overload

System Namespace

Parse

Other Resources

Formatting Types

Standard Numeric Format Strings

Custom Numeric Format Strings