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Convert.ToInt32 Method (Object)

Converts the value of the specified object to a 32-bit signed integer.

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

public static int ToInt32(
	Object value
)

Parameters

value
Type: System.Object

An object that implements the IConvertible interface, or null.

Return Value

Type: System.Int32
A 32-bit signed integer equivalent to value, or zero if value is null.

ExceptionCondition
FormatException

value is not in an appropriate format.

InvalidCastException

value does not implement the IConvertible interface.

-or-

The conversion is not supported.

OverflowException

value represents a number that is less than Int32.MinValue or greater than Int32.MaxValue.

The result of invoking the IConvertible.ToInt32 method of the underlying type of value.

The following example attempts to convert each element in an object array to an integer.

object[] values = { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
                    "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2, 16.3e42};
int result;

foreach (object value in values)
{
   try {
      result = Convert.ToInt32(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the Int32 type.",
                        value.GetType().Name, value);
   }                     
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to an Int32 exists for the {0} value {1}.",
                        value.GetType().Name, value);

   }
}                           
// The example displays the following output: 
//    Converted the Boolean value True to the Int32 value 1. 
//    Converted the Int32 value -12 to the Int32 value -12. 
//    Converted the Int32 value 163 to the Int32 value 163. 
//    Converted the Int32 value 935 to the Int32 value 935. 
//    Converted the Char value x to the Int32 value 120. 
//    No conversion to an Int32 exists for the DateTime value 5/12/2009 12:00:00 AM. 
//    Converted the String value 104 to the Int32 value 104. 
//    The String value 103.0 is not in a recognizable format. 
//    Converted the String value -1 to the Int32 value -1. 
//    The String value 1.00e2 is not in a recognizable format. 
//    The String value One is not in a recognizable format. 
//    Converted the Double value 100 to the Int32 value 100. 
//    The Double value 1.63E+43 is outside the range of the Int32 type.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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