Attribute.IsDefined Method (ParameterInfo, Type)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Determines whether any custom attributes are applied to a method parameter. Parameters specify the method parameter, and the type of the custom attribute to search for.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
Public Shared Function IsDefined ( _
element As ParameterInfo, _
attributeType As Type _
) As Boolean
public static bool IsDefined(
ParameterInfo element,
Type attributeType
)
Parameters
- element
Type: System.Reflection..::.ParameterInfo
An object derived from the ParameterInfo class that describes a parameter of a member of a class.
- attributeType
Type: System..::.Type
The type, or a base type, of the custom attribute to search for.
Return Value
Type: System..::.Boolean
true if a custom attribute of type attributeType is applied to element; otherwise, false.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | element or attributeType is nullNothingnullptra null reference (Nothing in Visual Basic). |
| ArgumentException | attributeType is not derived from Attribute. |
Remarks
The ancestors of element are searched for custom attributes.
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0
Platforms
Windows Phone