Export (0) Print
Expand All

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

Creates a new instance of the specified type defined in the specified assembly file.

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

public ObjectHandle CreateInstanceFrom(
	string assemblyFile,
	string typeName,
	bool ignoreCase,
	BindingFlags bindingAttr,
	Binder binder,
	Object[] args,
	CultureInfo culture,
	Object[] activationAttributes
)

Parameters

assemblyFile
Type: System.String

The name, including the path, of a file that contains an assembly that defines the requested type. The assembly is loaded using the LoadFrom method.

typeName
Type: System.String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the Type.FullName property.

ignoreCase
Type: System.Boolean

A Boolean value specifying whether to perform a case-sensitive search or not.

bindingAttr
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.

binder
Type: System.Reflection.Binder

An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects through reflection. If binder is null, the default binder is used.

args
Type: System.Object[]

The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the default constructor is preferred, args must be an empty array or null.

culture
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 null, the CultureInfo for the current thread is used.

activationAttributes
Type: System.Object[]

An array of one or more attributes that can participate in activation. 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
An object that is a wrapper for the new instance, or null if typeName is not found. The return value needs to be unwrapped to access the real object.

ExceptionCondition
ArgumentNullException

assemblyFile is null.

-or-

typeName is null.

NotSupportedException

The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.

AppDomainUnloadedException

The operation is attempted on an unloaded application domain.

FileNotFoundException

assemblyFile was not found.

TypeLoadException

typeName was not found in assemblyFile.

MissingMethodException

No matching public constructor was found.

MethodAccessException

The caller does not have sufficient permission to call this constructor.

BadImageFormatException

assemblyFile is not a valid assembly.

-or-

assemblyFile was compiled with a later version of the common language runtime than the version that is currently loaded.

FileLoadException

An assembly or module was loaded twice with two different evidences.

NullReferenceException

This instance is null.

For more information, see the Activator.CreateInstanceFrom method.

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

When the CreateInstanceFrom method is used to create an instance in a target application domain, other than the application domain from which the call is made, the assembly is loaded in the target application domain. However, if the instance is unwrapped in the calling application domain, using the unwrapped instance in certain ways can cause the assembly to be loaded into the calling application domain. For example, after the instance is unwrapped, its type information might be requested, in order to call its methods late-bound. When the assembly is loaded into the calling application domain, exceptions can occur.

  • If another version of the same assembly was previously loaded into the calling application domain, or if the load path of the calling application domain is different from that of the target application domain, exceptions such as MissingMethodException can occur.

  • If the calling application domain makes early-bound calls to the instance type, InvalidCastException can be thrown when an attempt is made to cast the instance.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft