Activator.CreateInstanceFrom Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters.
Overloads
CreateInstanceFrom(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence) |
Obsolete.
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and the constructor that best matches the specified parameters. |
CreateInstanceFrom(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence) |
Obsolete.
Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters. |
CreateInstanceFrom(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[]) |
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and the constructor that best matches the specified parameters. |
CreateInstanceFrom(String, String, Object[]) |
Creates an instance of the type whose name is specified, using the named assembly file and parameterless constructor. |
CreateInstanceFrom(AppDomain, String, String) |
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and parameterless constructor. |
CreateInstanceFrom(String, String) |
Creates an instance of the type whose name is specified, using the named assembly file and parameterless constructor. |
CreateInstanceFrom(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. |
CreateInstanceFrom(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)
Caution
Methods which use Evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and the constructor that best matches the specified parameters.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(AppDomain ^ domain, System::String ^ assemblyFile, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes, System::Security::Policy::Evidence ^ securityAttributes);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
[System.Obsolete("Methods which use Evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
[System.Security.SecurityCritical]
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
static member CreateInstanceFrom : AppDomain * string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
[<System.Obsolete("Methods which use Evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
[<System.Security.SecurityCritical>]
static member CreateInstanceFrom : AppDomain * string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
Public Shared Function CreateInstanceFrom (domain As AppDomain, assemblyFile As String, typeName As String, ignoreCase As Boolean, bindingAttr As BindingFlags, binder As Binder, args As Object(), culture As CultureInfo, activationAttributes As Object(), securityAttributes As Evidence) As ObjectHandle
Parameters
- domain
- AppDomain
The remote domain where the type named typeName
is created.
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
- ignoreCase
- Boolean
true
to specify that the search for typeName
is not case-sensitive; false
to specify that the search is case-sensitive.
- bindingAttr
- 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
- Binder
An object that uses bindingAttr
and args
to seek and identify the typeName
constructor. If binder
is null
, the default binder is used.
- args
- 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 null
, the constructor that takes no parameters (the parameterless constructor) is invoked.
- culture
- 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
- Object[]
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
- securityAttributes
- Evidence
Information used to make security policy decisions and grant code permissions.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
- Attributes
Exceptions
domain
or typeName
is null
.
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 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.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Remarks
Use CreateInstanceFrom when a host needs to execute code in an application domain that has restricted security permissions.
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.
Applies to
CreateInstanceFrom(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)
Caution
Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(System::String ^ assemblyFile, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes, System::Security::Policy::Evidence ^ securityInfo);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityInfo);
[System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityInfo);
static member CreateInstanceFrom : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
[<System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceFrom which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
static member CreateInstanceFrom : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
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(), securityInfo As Evidence) As ObjectHandle
Parameters
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
- ignoreCase
- Boolean
true
to specify that the search for typeName
is not case-sensitive; false
to specify that the search is case-sensitive.
- bindingAttr
- 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
- Binder
An object that uses bindingAttr
and args
to seek and identify the typeName
constructor. If binder
is null
, the default binder is used.
- args
- 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 null
, the constructor that takes no parameters (the parameterless constructor) is invoked.
- culture
- 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
- Object[]
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
- securityInfo
- Evidence
Information used to make security policy decisions and grant code permissions.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
- Attributes
Exceptions
typeName
is null
.
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.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Remarks
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.
Applies to
CreateInstanceFrom(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and the constructor that best matches the specified parameters.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(AppDomain ^ domain, System::String ^ assemblyFile, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes);
[System.Security.SecurityCritical]
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes);
[<System.Security.SecurityCritical>]
static member CreateInstanceFrom : AppDomain * string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] -> System.Runtime.Remoting.ObjectHandle
Public Shared Function CreateInstanceFrom (domain As AppDomain, 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
Parameters
- domain
- AppDomain
The remote domain where the type named typeName
is created.
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
- ignoreCase
- Boolean
true
to specify that the search for typeName
is not case-sensitive; false
to specify that the search is case-sensitive.
- bindingAttr
- 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
- Binder
An object that uses bindingAttr
and args
to seek and identify the typeName
constructor. If binder
is null
, the default binder is used.
- args
- 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 null
, the constructor that takes no parameters (the parameterless constructor) is invoked.
- culture
- 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
- Object[]
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
- Attributes
Exceptions
domain
or typeName
is null
.
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 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.
-or-
assemblyFile
was compiled for a version of the common language runtime that is later than the version that is currently loaded.
Remarks
Use CreateInstanceFrom when a host needs to execute code in an application domain that has restricted security permissions.
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 sections of the Assembly.LoadFrom and CreateInstance methods.
Applies to
CreateInstanceFrom(String, String, Object[])
- Source:
- Activator.cs
- Source:
- Activator.cs
- Source:
- Activator.cs
Creates an instance of the type whose name is specified, using the named assembly file and parameterless constructor.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(System::String ^ assemblyFile, System::String ^ typeName, cli::array <System::Object ^> ^ activationAttributes);
public static System.Runtime.Remoting.ObjectHandle? CreateInstanceFrom (string assemblyFile, string typeName, object?[]? activationAttributes);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, object[] activationAttributes);
static member CreateInstanceFrom : string * string * obj[] -> System.Runtime.Remoting.ObjectHandle
Public Shared Function CreateInstanceFrom (assemblyFile As String, typeName As String, activationAttributes As Object()) As ObjectHandle
Parameters
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
- activationAttributes
- Object[]
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
Exceptions
typeName
is null
.
No matching public 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.
activationAttributes
is not an empty array, and the type being created does not derive from MarshalByRefObject.
The caller does have the required FileIOPermission.
assemblyFile
is not a valid assembly.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Remarks
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.
Applies to
CreateInstanceFrom(AppDomain, String, String)
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and parameterless constructor.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(AppDomain ^ domain, System::String ^ assemblyFile, System::String ^ typeName);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName);
[System.Security.SecurityCritical]
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName);
static member CreateInstanceFrom : AppDomain * string * string -> System.Runtime.Remoting.ObjectHandle
[<System.Security.SecurityCritical>]
static member CreateInstanceFrom : AppDomain * string * string -> System.Runtime.Remoting.ObjectHandle
Public Shared Function CreateInstanceFrom (domain As AppDomain, assemblyFile As String, typeName As String) As ObjectHandle
Parameters
- domain
- AppDomain
The remote domain where the type named typeName
is created.
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
- Attributes
Exceptions
domain
or typeName
is null
.
No matching public 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 have the required FileIOPermission.
assemblyFile
is not a valid assembly.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Remarks
Use CreateInstanceFrom when a host needs to execute code in an application domain that has restricted security permissions.
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.
Applies to
CreateInstanceFrom(String, String)
- Source:
- Activator.cs
- Source:
- Activator.cs
- Source:
- Activator.cs
Creates an instance of the type whose name is specified, using the named assembly file and parameterless constructor.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(System::String ^ assemblyFile, System::String ^ typeName);
public static System.Runtime.Remoting.ObjectHandle? CreateInstanceFrom (string assemblyFile, string typeName);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName);
static member CreateInstanceFrom : string * string -> System.Runtime.Remoting.ObjectHandle
Public Shared Function CreateInstanceFrom (assemblyFile As String, typeName As String) As ObjectHandle
Parameters
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
Exceptions
typeName
is null
.
No matching public 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 have the required FileIOPermission.
assemblyFile
is not a valid assembly.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Examples
The following code example demonstrates how to call the CreateInstanceFrom method. This code example is part of a larger example provided for the Activator class.
// Create an instance of the SomeType class that is defined in this
// assembly.
System::Runtime::Remoting::ObjectHandle^ oh =
Activator::CreateInstanceFrom(Assembly::GetEntryAssembly()->CodeBase,
SomeType::typeid->FullName);
// Call an instance method defined by the SomeType type using this object.
SomeType^ st = (SomeType^) oh->Unwrap();
st->DoSomething(5);
// Create an instance of the SomeType class that is defined in this
// assembly.
System.Runtime.Remoting.ObjectHandle oh =
Activator.CreateInstanceFrom(Assembly.GetEntryAssembly().CodeBase,
typeof(SomeType).FullName);
// Call an instance method defined by the SomeType type using this object.
SomeType st = (SomeType) oh.Unwrap();
st.DoSomething(5);
// Create an instance of the SomeType class that is defined in this assembly.
let oh =
Activator.CreateInstanceFrom(Assembly.GetEntryAssembly().Location, typeof<SomeType>.FullName)
// Call an instance method defined by the SomeType type using this object.
let st = oh.Unwrap() :?> SomeType
st.DoSomething 5
' Create an instance of the SomeType class that is defined in this assembly.
Dim oh As System.Runtime.Remoting.ObjectHandle = _
Activator.CreateInstanceFrom(Assembly.GetEntryAssembly().CodeBase, _
GetType(SomeType).FullName)
' Call an instance method defined by the SomeType type using this object.
Dim st As SomeType = CType(oh.Unwrap(), SomeType)
st.DoSomething(5)
Remarks
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.
Applies to
CreateInstanceFrom(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])
- Source:
- Activator.cs
- Source:
- Activator.cs
- Source:
- Activator.cs
Creates an instance of the type whose name is specified, using the named assembly file and the constructor that best matches the specified parameters.
public:
static System::Runtime::Remoting::ObjectHandle ^ CreateInstanceFrom(System::String ^ assemblyFile, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes);
public static System.Runtime.Remoting.ObjectHandle? CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder? binder, object?[]? args, System.Globalization.CultureInfo? culture, object?[]? activationAttributes);
public static System.Runtime.Remoting.ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes);
static member CreateInstanceFrom : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] -> System.Runtime.Remoting.ObjectHandle
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
Parameters
- assemblyFile
- String
The name of a file that contains an assembly where the type named typeName
is sought.
- typeName
- String
The name of the type to create an instance of.
- ignoreCase
- Boolean
true
to specify that the search for typeName
is not case-sensitive; false
to specify that the search is case-sensitive.
- bindingAttr
- 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
- Binder
An object that uses bindingAttr
and args
to seek and identify the typeName
constructor. If binder
is null
, the default binder is used.
- args
- 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 null
, the constructor that takes no parameters (the parameterless constructor) is invoked.
- culture
- 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
- Object[]
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Returns
A handle that must be unwrapped to access the newly created object, or null
for Nullable<T> instances.
Exceptions
typeName
is null
.
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.
-or-
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyFile
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.
Remarks
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.
Applies to
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Очікується незабаром: протягом 2024 року ми будемо припиняти використання механізму реєстрації проблем у GitHub для зворотного зв’язку щодо вмісту й замінювати його новою системою зворотного зв’язку. Докладніше:Надіслати й переглянути відгук про