Activator.CreateInstanceFrom Method (String, String, Object)
Assembly: mscorlib (in mscorlib.dll)
public static ObjectHandle CreateInstanceFrom ( string assemblyFile, string typeName, Object 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. This is typically an array that contains a single UrlAttribute object. The UrlAttribute specifies the URL that is required to activate a remote object. For a detailed description of client-activated objects, see Client 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.
assemblyFile is not a valid assembly.
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyName was compiled for a version of the CLR that is later than the currently loaded version. Note that the .NET Framework versions 2.0, 3.0, and 3.5 all use CLR version 2.0.
- SecurityPermission for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
- FileIOPermission for the ability to search directory paths and read their contents. Associated enumerations: FileIOPermissionAccess.PathDiscovery and FileIOPermissionAccess.Read
- ReflectionPermission for accessing nonpublic types when the grant set of the nonpublic types is restricted to the caller's grant set, or to a subset thereof. Associated enumeration: System.Security.Permissions.ReflectionPermissionFlag.RestrictedMemberAccess
- ReflectionPermission for accessing nonpublic types regardless of their grant set. Associated enumeration: ReflectionPermissionFlag.MemberAccess
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.