Enum.IsDefined Method

Returns an indication whether a constant with a specified value exists in a specified enumeration.

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

[ComVisibleAttribute(true)] 
public static bool IsDefined (
	Type enumType,
	Object value
)
/** @attribute ComVisibleAttribute(true) */ 
public static boolean IsDefined (
	Type enumType, 
	Object value
)
ComVisibleAttribute(true) 
public static function IsDefined (
	enumType : Type, 
	value : Object
) : boolean
Not applicable.

Parameters

enumType

An enumeration type.

value

The value or name of a constant in enumType.

Return Value

true if a constant in enumType has a value equal to value; otherwise, false.

Exception typeCondition

ArgumentNullException

enumType or value is a null reference (Nothing in Visual Basic).

ArgumentException

enumType is not an Enum.

-or-

The type of value is not an enumType.

-or-

The type of value is not an underlying type of enumType.

InvalidOperationException

value is not type SByte, Int16, Int32, Int64, Byte, UInt16, UInt32, or UInt64, or String.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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