ComDefaultInterfaceAttribute ComDefaultInterfaceAttribute ComDefaultInterfaceAttribute ComDefaultInterfaceAttribute Class

定义

指定要向 COM 公开的默认接口。Specifies a default interface to expose to COM. 此类不能被继承。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
继承
ComDefaultInterfaceAttributeComDefaultInterfaceAttributeComDefaultInterfaceAttributeComDefaultInterfaceAttribute
属性

注解

编译器不一定是一致接口实现的顺序。Compilers do not necessarily respect the order in which interfaces are implemented. 例如,假设有以下代码:For example, suppose you have the following code:

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

编译器将发出实现的接口作为IDerived, IBaseThe compiler emits the implemented interfaces as IDerived, IBase. 接口的顺序十分重要,使用时ClassInterfaceAttribute类的[ClassInterface(ClassInterfaceType.None)]公开的默认接口的显式接口。The ordering of interfaces is important when using the ClassInterfaceAttribute class with [ClassInterface(ClassInterfaceType.None)] to expose an explicit interface as the default interface. 指定无论ClassInterfaceType,使用ComDefaultInterfaceAttribute特性以指定哪个接口应被识别为默认值。Regardless of the specified ClassInterfaceType, use the ComDefaultInterfaceAttribute attribute to specify which interface should be recognized as the default.

请注意,修饰的类型ComDefaultInterfaceAttribute必须实际派生自指定的默认接口的接口。Note that the type decorated by the ComDefaultInterfaceAttribute must actually derive from the interface specified as the default interface.

构造函数

ComDefaultInterfaceAttribute(Type) ComDefaultInterfaceAttribute(Type) ComDefaultInterfaceAttribute(Type) ComDefaultInterfaceAttribute(Type)

以指定的 Type 对象作为向 COM 公开的默认接口初始化 ComDefaultInterfaceAttribute 类的新实例。Initializes a new instance of the ComDefaultInterfaceAttribute class with the specified Type object as the default interface exposed to COM.

属性

TypeId TypeId TypeId TypeId

在派生类中实现时,获取此 Attribute 的唯一标识符。When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)
Value Value Value Value

获取 Type 对象,该对象指定要向 COM 公开的默认接口。Gets the Type object that specifies the default interface to expose to COM.

方法

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

返回一个值,该值指示此实例是否与指定的对象相等。Returns a value that indicates whether this instance is equal to a specified object.

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

返回此实例的哈希代码。Returns the hash code for this instance.

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

获取当前实例的 TypeGets the Type of the current instance.

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

在派生类中重写时,指示此实例的值是否是派生类的默认值。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)

当在派生类中重写时,返回一个指示此实例是否等于指定对象的值。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()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

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

返回表示当前对象的字符串。Returns a string that represents the current object.

(Inherited from Object)

显式界面实现

_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)

将一组名称映射为对应的一组调度标识符。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)

检索对象的类型信息,然后可以使用该信息获取接口的类型信息。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)

检索对象提供的类型信息接口的数量(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)

提供对某一对象公开的属性和方法的访问。Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

适用于