ImportedFromTypeLibAttribute ImportedFromTypeLibAttribute ImportedFromTypeLibAttribute ImportedFromTypeLibAttribute Class

定义

指示在程序集内定义的类型原来在类型库中定义。Indicates that the types defined within an assembly were originally defined in a type library.

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

示例

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

class ClassA
{
private:
   static bool IsCOMAssembly( Assembly^ a )
   {
      array<Object^>^AsmAttributes = a->GetCustomAttributes( ImportedFromTypeLibAttribute::typeid, true );
      if ( AsmAttributes->Length > 0 )
      {
         ImportedFromTypeLibAttribute^ imptlb = dynamic_cast<ImportedFromTypeLibAttribute^>(AsmAttributes[ 0 ]);
         String^ strImportedFrom = imptlb->Value;
         
         // Print out the name of the DLL from which the assembly is imported.
         Console::WriteLine( "Assembly {0} is imported from {1}", a->FullName, strImportedFrom );
         return true;
      }

      // This is not a COM assembly.
      Console::WriteLine( "Assembly {0} is not imported from COM", a->FullName );
      return false;
   }
};
using System;
using System.Reflection;
using System.Runtime.InteropServices;

namespace A
{
	class ClassA
	{
		public static bool IsCOMAssembly( Assembly a )
		{
			object[] AsmAttributes = a.GetCustomAttributes( typeof( ImportedFromTypeLibAttribute ), true );
			if( AsmAttributes.Length > 0 )
			{
				ImportedFromTypeLibAttribute imptlb = ( ImportedFromTypeLibAttribute )AsmAttributes[0];
				string strImportedFrom  = imptlb.Value;
				    
				// Print out the name of the DLL from which the assembly is imported.
				Console.WriteLine( "Assembly " + a.FullName + " is imported from " + strImportedFrom );
			
				return true;
			}  
			// This is not a COM assembly.
			Console.WriteLine( "Assembly " + a.FullName + " is not imported from COM" );
			return false;
		}
	}
}
Imports System
Imports System.Reflection
Imports System.Runtime.InteropServices

Module A
	Public Function IsCOMAssembly(ByVal a As System.Reflection.Assembly) As Boolean

		Dim AsmAttributes As Object() = a.GetCustomAttributes(GetType(ImportedFromTypeLibAttribute), True)
		If AsmAttributes.Length = 1 Then
			Dim imptlb As ImportedFromTypeLibAttribute = AsmAttributes(0)
			Dim strImportedFrom As String = imptlb.Value

			' Print out the name of the DLL from which the assembly is imported.
			Console.WriteLine("Assembly " + a.FullName + " is imported from " + strImportedFrom)

			Return True
		End If

		' This is not a COM assembly.
		Console.WriteLine("Assembly " + a.FullName + " is not imported from COM")

		Return False
	End Function
End Module

注解

您可以将此特性应用于程序集,虽然Tlbimp.exe (类型库导入程序)通常将其应用为你时它的类型库。You can apply this attribute to assemblies, although the Tlbimp.exe (Type Library Importer) typically applies it for you when it a type library.

该属性的主要用途是捕获的原始源的类型信息。The primary use of the attribute is to capture the original source of the type information. 例如,可以作为名为 A.dll 的互操作程序集导入 A.tlb 并具有 B.dll 引用 A.dll 的程序集。For example, you can import A.tlb as an interop assembly called A.dll and have assembly B.dll reference A.dll. 导出到 B.tlb B.dll 时, 此属性会引用指向 A.dll 以改为指向 A.tlb B.tlb 中。When you export B.dll to B.tlb, this attribute causes the references in B.tlb that point to A.dll to point instead to A.tlb. 不应与混淆这ComImportAttribute,它指定单个类型实现在 com。This should not be confused with the ComImportAttribute, which specifies that an individual type is implemented in COM.

构造函数

ImportedFromTypeLibAttribute(String) ImportedFromTypeLibAttribute(String) ImportedFromTypeLibAttribute(String) ImportedFromTypeLibAttribute(String)

用原始类型库文件的名称初始化 ImportedFromTypeLibAttribute 类的新实例。Initializes a new instance of the ImportedFromTypeLibAttribute class with the name of the original type library file.

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

获取原始类型库文件的名称。Gets the name of the original type library file.

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