AttributeUsageAttribute AttributeUsageAttribute AttributeUsageAttribute AttributeUsageAttribute Class

定義

指定另一個屬性 (Attribute) 類別的使用方法。Specifies the usage of another attribute class. 這個類別無法被繼承。This class cannot be inherited.

public ref class AttributeUsageAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Class, Inherited=true)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public sealed class AttributeUsageAttribute : Attribute
type AttributeUsageAttribute = class
    inherit Attribute
Public NotInheritable Class AttributeUsageAttribute
Inherits Attribute
繼承
AttributeUsageAttributeAttributeUsageAttributeAttributeUsageAttributeAttributeUsageAttribute
屬性

備註

當您正在定義您自己的屬性類別時,您可以控制它正由放置的方式AttributeUsageAttribute屬性類別上。When you are defining your own attribute class, you can control the manner in which it is used by placing an AttributeUsageAttribute on your attribute class. 指定的屬性類別必須衍生自Attribute,直接或間接。The indicated attribute class must derive from Attribute, either directly or indirectly.

屬性的類別有位置和具名參數。Attribute classes have positional and named parameters. 每個公用屬性類別的建構函式定義的位置參數,該類別是有效的序列。Each public constructor for an attribute class defines a valid sequence of positional parameters for that class. 具名的參數被定義非靜態、 公用和讀寫欄位或屬性類別的屬性。Named parameters are defined by the non-static, public, and read-write fields or properties of the attribute class.

三個屬性的AttributeUsageAttribute為藉由定義下列參數:The three properties of AttributeUsageAttribute are set by defining the following parameters:

此位置的參數會指定所指出的屬性可以放在的程式項目。This positional parameter specifies the program elements that the indicated attribute can be placed on. 您可以將屬性放的所有可能元素的集合會列在AttributeTargets列舉型別。The set of all possible elements that you can place an attribute on is listed in the AttributeTargets enumeration. 您可以結合數個AttributeTargets使用位元的 OR 運算,以取得有效的程式元素的所需的組合值。You can combine several AttributeTargets values using a bitwise OR operation to get the desired combination of valid program elements.

此具名的參數會指定是否可以多次指定的程式項目指定所指出的屬性。This named parameter specifies whether the indicated attribute can be specified more than once for a given program element.

此具名的參數會指定所指出的屬性是否可以繼承的衍生的類別並覆寫成員。This named parameter specifies whether the indicated attribute can be inherited by derived classes and overriding members.

如需使用屬性的詳細資訊,請參閱Attribute屬性For more information about using attributes, see Attribute and Attributes.

建構函式

AttributeUsageAttribute(AttributeTargets) AttributeUsageAttribute(AttributeTargets) AttributeUsageAttribute(AttributeTargets) AttributeUsageAttribute(AttributeTargets)

使用指定的 AttributeUsageAttribute 清單、AttributeTargets 值和 AllowMultiple 值,初始化 Inherited 類別的新執行個體。Initializes a new instance of the AttributeUsageAttribute class with the specified list of AttributeTargets, the AllowMultiple value, and the Inherited value.

屬性

AllowMultiple AllowMultiple AllowMultiple AllowMultiple

取得或設定布林值 (Boolean),指出所指定屬性的幾個執行個體能否指定給單一程式項目。Gets or sets a Boolean value indicating whether more than one instance of the indicated attribute can be specified for a single program element.

Inherited Inherited Inherited Inherited

取得或設定 Boolean 值,判斷指示的屬性是否由衍伸類別繼承並覆寫成員。Gets or sets a Boolean value that determines whether the indicated attribute is inherited by derived classes and overriding members.

TypeId TypeId TypeId TypeId

在衍生類別中實作時,取得這個 Attribute 的唯一識別碼。When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)
ValidOn ValidOn ValidOn ValidOn

取得一組數值,辨識哪些程式項目可套用所指定的屬性。Gets a set of values identifying which program elements that the indicated attribute can be applied to.

方法

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

傳回值,這個值指出此執行個體是否與指定的物件相等。Returns a value that indicates whether this instance is equal to a specified object.

(Inherited from Attribute)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

傳回這個執行個體的雜湊碼。Returns the hash code for this instance.

(Inherited from Attribute)
GetType() GetType() GetType() GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(Inherited from Object)
IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute()

在衍生類別中覆寫時,表示這個執行個體的值是衍生類別的預設值。When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(Inherited from Attribute)
Match(Object) Match(Object) Match(Object) Match(Object)

在衍生類別中覆寫時,會傳回值,表示這個執行個體是否等於指定物件。When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(Inherited from Attribute)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

建立目前 Object 的淺層複本 (Shallow Copy)。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(Inherited from Object)

明確介面實作

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

將一組名稱對應至一組對應的分派識別項 (Dispatch Identifier)。Maps a set of names to a corresponding set of dispatch identifiers.

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

擷取物件的類型資訊,可以用來取得介面的類型資訊。Retrieves the type information for an object, which can be used to get the type information for an interface.

(Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32)

擷取物件提供的類型資訊介面數目 (0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

提供物件所公開的屬性和方法的存取權。Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

適用於

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