InterfaceTypeAttribute InterfaceTypeAttribute InterfaceTypeAttribute InterfaceTypeAttribute Class

定义

指示向 COM 公开时,托管接口是双重的、仅支持调度的、还是仅支持 IUnknown 的。Indicates whether a managed interface is dual, dispatch-only, or IUnknown -only when exposed to COM.

public ref class InterfaceTypeAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Interface, Inherited=false)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class InterfaceTypeAttribute : Attribute
type InterfaceTypeAttribute = class
    inherit Attribute
Public NotInheritable Class InterfaceTypeAttribute
Inherits Attribute
继承
InterfaceTypeAttributeInterfaceTypeAttributeInterfaceTypeAttributeInterfaceTypeAttribute
属性

示例

下面的示例演示如何InterfaceTypeAttribute控制如何向 COM 公开接口The following example shows how InterfaceTypeAttribute controls how the interface is exposed to COM.

using namespace System::Runtime::InteropServices;

//Interface is exposed to COM as dual.
interface class IMyInterface1{};

//Insert code here.
//Interface is exposed to COM as IDispatch.

[InterfaceTypeAttribute(ComInterfaceType::InterfaceIsIDispatch)]
interface class IMyInterface2{};
//Insert code here.
using System.Runtime.InteropServices;

//Interface is exposed to COM as dual.
interface IMyInterface1 
{
    //Insert code here.
}

//Interface is exposed to COM as IDispatch.
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIDispatch)]
interface IMyInterface2 
{
    //Insert code here.
}
Imports System.Runtime.InteropServices

'Interface is exposed to COM as dual.
Interface IMyInterface1
     'Insert code here.
End Interface

'Interface is exposed to COM as IDispatch.
<InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIDispatch)> _
Interface IMyInterface2
    'Insert code here.
End Interface

注解

您可以将此特性应用于接口。You can apply this attribute to interfaces.

默认情况下Tlbexp.exe (类型库导出程序)公开到 COM 托管的接口为双重接口,为您提供后期绑定的灵活性或早期绑定的性能。By default, the Tlbexp.exe (Type Library Exporter) exposes a managed interface to COM as a dual interface, giving you the flexibility of late binding or the performance of early binding. ComInterfaceType枚举,可重写默认行为并指定仅后期绑定或仅早期绑定。The ComInterfaceType enumeration enables you to override the default behavior and specify late binding only or early binding only. 例如,可以应用InterfaceType (ComInterfaceType.InterfaceIsIDispatch)到接口,从而生成元数据来限制对仅使用后期绑定调用方。For example, you can apply InterfaceType (ComInterfaceType.InterfaceIsIDispatch) to an interface to produce metadata to restrict callers to late binding only. 尽管接口派生自IDispatch界面通常是双重的InterfaceIsIDispatch枚举成员允许仅后期绑定调用接口方法。Although interfaces that derive from the IDispatch interface are often dual, the InterfaceIsIDispatch enumeration member allows only late-bound calls to the interface methods. 此属性不起该接口的托管视图。This attribute has no effect on the managed view of the interface. 有关如何向 COM 公开接口的其他信息,请参阅导出类型转换For additional information on how interfaces are exposed to COM, see Exported Type Conversion.

Tlbimp.exe (类型库导入程序)还将向此特性应用导入,nondual 接口; 它将应用相应的枚举成员,以指示仅支持调度的接口或IUnknown-仅。The Tlbimp.exe (Type Library Importer) also applies this attribute to imported, nondual interfaces; it applies the appropriate enumeration member to indicate that the interface is dispatch-only or IUnknown -only.

构造函数

InterfaceTypeAttribute(ComInterfaceType) InterfaceTypeAttribute(ComInterfaceType) InterfaceTypeAttribute(ComInterfaceType) InterfaceTypeAttribute(ComInterfaceType)

使用指定的 ComInterfaceType 枚举成员初始化 InterfaceTypeAttribute 类的新实例。Initializes a new instance of the InterfaceTypeAttribute class with the specified ComInterfaceType enumeration member.

InterfaceTypeAttribute(Int16) InterfaceTypeAttribute(Int16) InterfaceTypeAttribute(Int16) InterfaceTypeAttribute(Int16)

使用指定的 ComInterfaceType 枚举成员初始化 InterfaceTypeAttribute 类的新实例。Initializes a new instance of the InterfaceTypeAttribute class with the specified ComInterfaceType enumeration member.

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 ComInterfaceType 值,该值描述应如何向 COM 公开接口。Gets the ComInterfaceType value that describes how the interface should be exposed 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

另请参阅