Int32.ToString Method (String)
May 02, 2013
Converts the numeric value of this instance to its equivalent string representation, using the specified format.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- format
- Type: System.String
A standard or custom numeric format string (see Remarks).
Return Value
Type: System.StringThe string representation of the value of this instance as specified by format.
| Exception | Condition |
|---|---|
| FormatException | format is invalid or not supported. |
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:
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.
The return value of this instance is formatted with the NumberFormatInfo for the current culture.
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.
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
