December 2001
Beginner
464 pages
13h 51m
English
Content preview from Programming Visual Basic .NETBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
AttributeUsage
Valid on
Class
Description
When defining an attribute class, the
AttributeUsage
attribute specifies the program elements
upon which the newly defined attribute can be placed.
The AttributeUsageAttribute class constructor is:
Public Sub New(ByVal validOn As System.AttributeTargets)The validOn parameter indicates the
program elements to which the newly defined attribute can be applied.
Permitted values are: Assembly,
Module, Class,
Struct, Enum,
Constructor, Method,
Property, Field,
Event, Interface,
Parameter, Delegate,
ReturnValue, and All.
The properties of the AttributeUsageAttribute class are:
- AllowMultiple
Indicates whether the attribute can be used more than once on a single program element. The type is Boolean. The default is
False.- Inherited
Indicates whether the newly defined attribute is automatically inherited by derived classes and overridden members. The type is Boolean. The default is
False.- ValidOn
Indicates the program elements to which the newly defined attribute can be applied. The type is AttributeTargets (defined in the System namespace).
See Chapter 2 for information on defining custom attributes.
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