ComDefaultInterfaceAttribute 类

定义

指定要向 COM 公开的默认接口。Specifies a default interface to expose to COM. 无法继承此类。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
ComDefaultInterfaceAttribute
属性

注解

编译器不一定遵循接口的实现顺序。Compilers do not necessarily respect the order in which interfaces are implemented. 例如,假设你有以下代码:For example, suppose you have the following code:

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

编译器会将实现的接口作为 IDerived, IBase发出。The compiler emits the implemented interfaces as IDerived, IBase. ClassInterfaceAttribute 类与 [ClassInterface(ClassInterfaceType.None)] 结合使用来将显式接口公开为默认接口时,接口的顺序非常重要。The ordering of interfaces is important when using the ClassInterfaceAttribute class with [ClassInterface(ClassInterfaceType.None)] to expose an explicit interface as the default interface. 无论指定 ClassInterfaceType如何,均使用 ComDefaultInterfaceAttribute 属性指定应将哪个接口识别为默认值。Regardless of the specified ClassInterfaceType, use the ComDefaultInterfaceAttribute attribute to specify which interface should be recognized as the default.

请注意,ComDefaultInterfaceAttribute 修饰的类型实际上必须派生自指定为默认接口的接口。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)

以指定的 ComDefaultInterfaceAttribute 对象作为向 COM 公开的默认接口初始化 Type 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

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.

(继承自 Attribute)
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)

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.

(继承自 Attribute)
GetHashCode()

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

(继承自 Attribute)
GetType()

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

(继承自 Object)
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.

(继承自 Attribute)
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.

(继承自 Attribute)
MemberwiseClone()

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

(继承自 Object)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)

显式接口实现

_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.

(继承自 Attribute)
_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.

(继承自 Attribute)
_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).

(继承自 Attribute)
_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.

(继承自 Attribute)

适用于