IDispatchImplAttribute IDispatchImplAttribute IDispatchImplAttribute IDispatchImplAttribute Class

定义

警告

此 API 现已过时。

指示当向 COM 公开双重接口和调度接口时公共语言运行时使用何种 IDispatch 实现。Indicates which IDispatch implementation the common language runtime uses when exposing dual interfaces and dispinterfaces to COM.

public ref class IDispatchImplAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class, Inherited=false)]
[System.Obsolete("This attribute is deprecated and will be removed in a future version.", false)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class IDispatchImplAttribute : Attribute
type IDispatchImplAttribute = class
    inherit Attribute
Public NotInheritable Class IDispatchImplAttribute
Inherits Attribute
继承
IDispatchImplAttributeIDispatchImplAttributeIDispatchImplAttributeIDispatchImplAttribute
属性

示例

下面的示例演示如何将应用IDispatchImplAttribute以选择IDispatch由公共语言运行时提供的实现。The following example demonstrates how to apply IDispatchImplAttribute to select the IDispatch implementation supplied by the common language runtime.

using namespace System;
using namespace System::Runtime::InteropServices;

// by default all classes in this assembly will use COM implementaion
//   // But this class will use runtime implementaion

[assembly:IDispatchImpl(IDispatchImplType::CompatibleImpl)];
[IDispatchImpl(IDispatchImplType::InternalImpl)]
ref class MyClass{};
using System;
using System.Runtime.InteropServices;
// by default all classes in this assembly will use COM implementaion 
[assembly:IDispatchImpl(IDispatchImplType.CompatibleImpl)]

namespace MyNamespace
{
	// But this class will use runtime implementaion
	[IDispatchImpl(IDispatchImplType.InternalImpl)]
	class MyClass
	{
		//
	}
}

Imports System
Imports System.Runtime.InteropServices
' by default all classes in this assembly will use COM implementaion 
<Assembly: IDispatchImpl(IDispatchImplType.CompatibleImpl)> 

Module MyNamespace
	' But this class will use runtime implementaion
	<IDispatchImpl(IDispatchImplType.InternalImpl)> _
	Public Class c
		'
	End Class

End Module

注解

可以将此特性应用于类或程序集。You can apply this attribute to classes or assemblies.

需要显式实现时,仅应设置此属性。This attribute should only be set when an explicit implementation is required. 将属性设置为CompatibleImpl,则IDispatch实现提供通过将该对象的类型信息传递到 COM 的CreateStdDispatchAPI。When you set the attribute to CompatibleImpl, the IDispatch implementation is supplied by passing the type information for the object to COM's CreateStdDispatch API. 将属性设置为InternalImpl,则IDispatch公共语言运行时提供实现。When you set the attribute to InternalImpl, the IDispatch implementation is supplied by the common language runtime. 将属性设置为SystemDefinedImpl允许运行时选择相应的实现。Setting the attribute to SystemDefinedImpl allows the runtime to choose the appropriate implementation. 当一个程序集上使用该属性,该特性应用到程序集内定义的所有类。When using the attribute on an assembly, the attribute applies to all classes defined within the assembly. 时使用单个类上的属性,该属性仅适用于此类公开的接口,替代的任何程序集级别设置。When using the attribute on an individual class, the attribute applies only to the interfaces exposed by that class and overrides any assembly-level setting.

构造函数

IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType)

使用指定的 IDispatchImplType 值初始化 IDispatchImplAttribute 类的新实例。Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value.

IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16)

使用指定的 IDispatchImplType 值初始化 IDispatchImplAttribute 类的新实例。Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value.

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

获取由类使用的 IDispatchImplType 值。Gets the IDispatchImplType value used by the class.

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