Activator.CreateInstanceFrom Method (String, String, Object)
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Shared Function CreateInstanceFrom ( _ assemblyFile As String, _ typeName As String, _ activationAttributes As Object() _ ) As ObjectHandle 'Usage Dim assemblyFile As String Dim typeName As String Dim activationAttributes As Object() Dim returnValue As ObjectHandle returnValue = Activator.CreateInstanceFrom(assemblyFile, typeName, activationAttributes)
public static ObjectHandle CreateInstanceFrom ( String assemblyFile, String typeName, Object activationAttributes )
public static function CreateInstanceFrom ( assemblyFile : String, typeName : String, activationAttributes : Object ) : ObjectHandle
The name of a file that contains an assembly where the type named typeName is sought.
The name of the preferred type.
An array of one or more attributes that can participate in activation.
Return ValueA handle that must be unwrapped to access the newly created instance.
typeName is a null reference (Nothing in Visual Basic).
No matching public constructor was found.
typename was not found in assemblyFile.
assemblyFile was not found.
The caller does not have permission to call this constructor.
Cannot create an instance of an abstract class or this member was invoked with a late-binding mechanism.
The constructor, which was invoked through reflection, threw an exception.
activationAttributes is not an empty array and the type being created does not derive from MarshalByRefObject.
The caller does have the required FileIOPermission.
- SecurityPermission for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag/UnmanagedCode
- ReflectionPermission for the ability to invoke operations on all type members. Associated enumeration: ReflectionPermissionFlag/MemberAccess
- FileIOPermission for the ability to search directory paths and read their contents. Associated enumerations: FileIOPermissionAccess/PathDiscovery and Read
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.