ImportedFromTypeLibAttribute Class
Assembly: mscorlib (in mscorlib.dll)
'Declaration <ComVisibleAttribute(True)> _ <AttributeUsageAttribute(AttributeTargets.Assembly, Inherited:=False)> _ Public NotInheritable Class ImportedFromTypeLibAttribute Inherits Attribute 'Usage Dim instance As ImportedFromTypeLibAttribute
/** @attribute ComVisibleAttribute(true) */ /** @attribute AttributeUsageAttribute(AttributeTargets.Assembly, Inherited=false) */ public final class ImportedFromTypeLibAttribute extends Attribute
ComVisibleAttribute(true) AttributeUsageAttribute(AttributeTargets.Assembly, Inherited=false) public final class ImportedFromTypeLibAttribute extends Attribute
Not applicable.
You can apply this attribute to assemblies, although the Type Library Importer (Tlbimp.exe) typically applies it for you when it a type library.
The primary use of the attribute is to capture the original source of the type information. For example, you can import A.tlb as an interop assembly called A.dll and have assembly B.dll reference A.dll. 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. This should not be confused with the ComImportAttribute, which specifies that an individual type is implemented in COM.
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 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
import System.*;
import System.Reflection.*;
import System.Runtime.InteropServices.*;
class ClassA
{
public static boolean IsCOMAssembly(Assembly a)
{
Object asmAttributes[] = a.GetCustomAttributes(
ImportedFromTypeLibAttribute.class.ToType(), true);
if (asmAttributes.length > 0) {
ImportedFromTypeLibAttribute imptlb
= (ImportedFromTypeLibAttribute)(asmAttributes.get_Item(0));
String strImportedFrom = imptlb.get_Value();
// Print out the the name of the DLL from which
// the assembly is imported.
Console.WriteLine("Assembly " + a.get_FullName()
+ " is imported from " + strImportedFrom);
return true;
}
// This is not a COM assembly.
Console.WriteLine("Assembly " + a.get_FullName()
+ " is not imported from COM");
return false;
} //IsCOMAssembly
} //ClassA
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.