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Activator.CreateInstanceFrom Method (String, String, Object[])

Creates an instance of the type whose name is specified, using the named assembly file and default constructor.

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

public static ObjectHandle CreateInstanceFrom(
	string assemblyFile,
	string typeName,
	Object[] activationAttributes
)

Parameters

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.

activationAttributes
Type: System.Object[]

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.

Return Value

Type: System.Runtime.Remoting.ObjectHandle
A handle that must be unwrapped to access the newly created instance.

ExceptionCondition
ArgumentNullException

typeName is null.

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.

NotSupportedException

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

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 the ObjectHandle.Unwrap method to unwrap the return value.

The activationAttributes parameter is related to client-activated objects; see Client Activation.

For information about other exceptions that can be thrown by invoked methods, see the Exceptions section of the Assembly.LoadFrom and CreateInstance methods.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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