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Activator.CreateInstanceFrom Method (String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)

Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

public static ObjectHandle CreateInstanceFrom (
	string assemblyFile,
	string typeName,
	bool ignoreCase,
	BindingFlags bindingAttr,
	Binder binder,
	Object[] args,
	CultureInfo culture,
	Object[] activationAttributes,
	Evidence securityInfo
)
public static ObjectHandle CreateInstanceFrom (
	String assemblyFile, 
	String typeName, 
	boolean ignoreCase, 
	BindingFlags bindingAttr, 
	Binder binder, 
	Object[] args, 
	CultureInfo culture, 
	Object[] activationAttributes, 
	Evidence securityInfo
)
public static function CreateInstanceFrom (
	assemblyFile : String, 
	typeName : String, 
	ignoreCase : boolean, 
	bindingAttr : BindingFlags, 
	binder : Binder, 
	args : Object[], 
	culture : CultureInfo, 
	activationAttributes : Object[], 
	securityInfo : Evidence
) : ObjectHandle

Parameters

assemblyFile

The name of a file that contains an assembly where the type named typeName is sought.

typeName

The name of the preferred type.

ignoreCase

true to specify the search for typeName is not case-sensitive; false to specify the search is case-sensitive.

bindingAttr

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.

binder

An object that uses bindingAttr and args to seek and identify the typeName constructor. If binder is a null reference (Nothing in Visual Basic), the default binder is used.

args

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 a null reference (Nothing in Visual Basic), the constructor that takes no parameters (the default constructor) is invoked.

culture

Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is a null reference (Nothing in Visual Basic), the CultureInfo for the current thread is used.

activationAttributes

An array of one or more attributes that can participate in activation.

securityInfo

Information used to make security policy decisions and grant code permissions.

Return Value

A handle that must be unwrapped to access the newly created instance.

Exception typeCondition

ArgumentNullException

typeName is a null reference (Nothing in Visual Basic).

MissingMethodException

No matching 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.

NotSupportedException

activationAttributes is not an empty array and the type being created does not derive from MarshalByRefObject.

Use the ObjectHandle.Unwrap method to unwrap the return value.

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
  • 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.

.NET Framework

Supported in: 2.0, 1.1, 1.0
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