Activator.CreateInstanceFrom Method (String, String, Boolean, BindingFlags, Binder, Object(), CultureInfo, Object())
Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Shared Function CreateInstanceFrom ( _ assemblyFile As String, _ typeName As String, _ ignoreCase As Boolean, _ bindingAttr As BindingFlags, _ binder As Binder, _ args As Object(), _ culture As CultureInfo, _ activationAttributes As Object() _ ) As ObjectHandle
- Type: System.String
The name of a file that contains an assembly where the type named typeName is sought.
- Type: System.String
The name of the preferred type.
- Type: System.Boolean
true to specify that the search for typeName is not case-sensitive; false to specify that the search is case-sensitive.
- Type: System.Reflection.BindingFlags
A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.
- Type: System.Reflection.Binder
An object that uses bindingAttr and args to seek and identify the typeName constructor. If binder is Nothing, the default binder is used.
- Type: System.Object()
An array of arguments that match in number, order, and type the parameters of the constructor to invoke. If args is an empty array or Nothing, the constructor that takes no parameters (the default constructor) is invoked.
- Type: System.Globalization.CultureInfo
Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is Nothing, the CultureInfo for the current thread is used.
Return ValueType: System.Runtime.Remoting.ObjectHandle
A handle that must be unwrapped to access the newly created instance.
typeName is Nothing.
No matching 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.
The caller does not have the required FileIOPermission.
activationAttributes is not an empty array, and the type being created does not derive from MarshalByRefObject.
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.
Use the ObjectHandle.Unwrap method to unwrap the return value.
The activationAttributes parameter is related to client-activated objects; see Client Activation.
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
for accessing nonpublic types and members when the grant set of the nonpublic types and members is restricted to the caller's grant set or to a subset thereof. Associated enumeration: ReflectionPermissionFlag.RestrictedMemberAccess
for accessing nonpublic types and members regardless of their grant set. Associated enumeration: ReflectionPermissionFlag.MemberAccess