共用方式為

  • 發行項

Attribute.IsDefined Method (ParameterInfo, Type, Boolean)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Determines whether any custom attributes are applied to a method parameter. Parameters specify the method parameter, the type of the custom attribute to search for, and whether to search ancestors of the method parameter.

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

Syntax

'Declaration
Public Shared Function IsDefined ( _
    element As ParameterInfo, _
    attributeType As Type, _
    inherit As Boolean _
) As Boolean

public static bool IsDefined(
    ParameterInfo element,
    Type attributeType,
    bool inherit
)

Parameters

  • attributeType
    Type: System.Type
    The type, or a base type, of the custom attribute to search for.
  • inherit
    Type: System.Boolean
    If true, specifies to also search the ancestors of element for custom attributes.

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 nulla null reference (Nothing in Visual Basic).
ArgumentException

attributeType is not derived from Attribute.
ExecutionEngineException

element is not a method, constructor, or type.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.