Activator::CreateInstance Method (String, String)
Creates an instance of the type whose name is specified, using the named assembly and default constructor.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- assemblyName
- Type: System::String
The name of the assembly where the type named typeName is sought. If assemblyName is nullptr, the executing assembly is searched.
- 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 | typeName is nullptr. |
| MissingMethodException | No matching public constructor was found. |
| TypeLoadException | typename was not found in assemblyName. |
| FileNotFoundException | assemblyName was not found. |
| MethodAccessException | The caller does not have permission to call this constructor. |
| MemberAccessException | You 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. |
| InvalidComObjectException | The COM type was not obtained through GetTypeFromProgID or GetTypeFromCLSID. |
| NotSupportedException | Creation of TypedReference, ArgIterator, Void, and RuntimeArgumentHandle types, or arrays of those types, is not supported. |
| BadImageFormatException | assemblyName 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. |
| FileLoadException | An assembly or module was loaded twice with two different evidences. |
Use ObjectHandle::Unwrap to unwrap the return value.
Note |
|---|
Starting with the .NET Framework version 2.0 Service Pack 1, this method can be used to create nonpublic types if the caller has been granted ReflectionPermission with the ReflectionPermissionFlag::RestrictedMemberAccess flag and if the grant set of the assembly that contains the nonpublic types is restricted to the caller’s grant set or to a subset thereof. (See Security Considerations for Reflection.) To use this functionality, your application should target the .NET Framework version 3.5 or later. |
- SecurityPermission
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag::UnmanagedCode
- ReflectionPermission
for accessing a nonpublic type when the grant set of the nonpublic type is restricted to the caller's grant set or to a subset thereof. Associated enumeration: ReflectionPermissionFlag::RestrictedMemberAccess
- ReflectionPermission
for accessing nonpublic types regardless of their grant set. Associated enumeration: ReflectionPermissionFlag::MemberAccess
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