ComDefaultInterfaceAttribute 類別

定義

指定要公開至 COM 的預設介面。Specifies a default interface to expose to COM. 無法繼承這個類別。This class cannot be inherited.

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

備註

編譯器不一定會遵循介面的實作為順序。Compilers do not necessarily respect the order in which interfaces are implemented. 例如,假設您有下列程式碼:For example, suppose you have the following code:

interface IBase {}interface IDerived : IBase {}class MyClass : IBase, IDerived {}  

編譯器會發出實作為 IDerived, IBase的介面。The compiler emits the implemented interfaces as IDerived, IBase. 使用 ClassInterfaceAttribute 類別搭配 [ClassInterface(ClassInterfaceType.None)],將明確的介面公開為預設介面時,介面的順序很重要。The ordering of interfaces is important when using the ClassInterfaceAttribute class with [ClassInterface(ClassInterfaceType.None)] to expose an explicit interface as the default interface. 不論指定的 ClassInterfaceType為何,請使用 ComDefaultInterfaceAttribute 屬性來指定應該辨識為預設的介面。Regardless of the specified ClassInterfaceType, use the ComDefaultInterfaceAttribute attribute to specify which interface should be recognized as the default.

請注意,ComDefaultInterfaceAttribute 所裝飾的類型,實際上必須衍生自指定為預設介面的介面。Note that the type decorated by the ComDefaultInterfaceAttribute must actually derive from the interface specified as the default interface.

建構函式

ComDefaultInterfaceAttribute(Type)

使用指定的 ComDefaultInterfaceAttribute 物件做為公開至 COM 的預設介面,初始化 Type 類別的新執行個體。Initializes a new instance of the ComDefaultInterfaceAttribute class with the specified Type object as the default interface exposed to COM.

屬性

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.

(繼承來源 Attribute)
Value

取得 Type 物件,其指定要公開至 COM 的預設介面。Gets the Type object that specifies the default interface to expose to COM.

方法

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.

(繼承來源 Attribute)
GetHashCode()

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

(繼承來源 Attribute)
GetType()

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

(繼承來源 Object)
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.

(繼承來源 Attribute)
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.

(繼承來源 Attribute)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

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

(繼承來源 Object)

明確介面實作

_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.

(繼承來源 Attribute)
_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.

(繼承來源 Attribute)
_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).

(繼承來源 Attribute)
_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.

(繼承來源 Attribute)

適用於