Activator::CreateInstanceFrom Method (AppDomain, String, String)
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and default constructor.
Assembly: mscorlib (in mscorlib.dll)
public: static ObjectHandle^ CreateInstanceFrom( AppDomain^ domain, String^ assemblyFile, String^ typeName )
Parameters
- domain
- Type: System::AppDomain
The remote domain where the type named typeName is created.
- assemblyFile
- Type: System::String
The name of a file that contains an assembly where the type named typeName is sought.
- typeName
- Type: System::String
The name of the preferred type.
Return Value
Type: System.Runtime.Remoting::ObjectHandleA handle that must be unwrapped to access the newly created instance.
| Exception | Condition |
|---|---|
| ArgumentNullException | domain or typeName is nullptr. |
| MissingMethodException | No matching public constructor was found. |
| TypeLoadException | typename was not found in assemblyFile. |
| FileNotFoundException | assemblyFile was not found. |
| MethodAccessException | The caller does not have permission to call this constructor. |
| MemberAccessException | Cannot create an instance of an abstract class, or this member was invoked with a late-binding mechanism. |
| TargetInvocationException | The constructor, which was invoked through reflection, threw an exception. |
| SecurityException | The caller does have the required FileIOPermission. |
| BadImageFormatException | assemblyFile is not a valid assembly. -or- 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. |
Use CreateInstanceFrom when a host needs to execute code in an application domain that has restricted security permissions.
Use the ObjectHandle::Unwrap method to unwrap the return value.
Note |
|---|
This method uses SecurityAction::LinkDemand to require the immediate caller to have full trust. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand. |
For information about other exceptions that can be thrown by invoked methods, see the Exceptions section of the Assembly::LoadFrom and CreateInstance methods.
- 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
- SecurityCriticalAttribute
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Note