ViewStateModeByIdAttribute Class
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ViewStateModeByIdAttribute Class


Defines the metadata attribute that ASP.NET server controls use to specify whether they participate in loading view-state information by ID. This class cannot be inherited.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)


public sealed class ViewStateModeByIdAttribute : Attribute


Initializes a new instance of the ViewStateModeByIdAttribute class.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

The ViewStateModeByIdAttribute class is used to specify a control that requires view-state loading by ID. The default view-state loading behavior is for ASP.NET to load the view-state information for a control by its index in the control tree of the page. There is a performance cost for loading view-state information by ID because the page control tree must be searched for the control specifically before loading its view-state information.

If the ViewStateModeByIdAttribute class is used as a metadata attribute of a custom control class,

the LoadViewStateByID property of the control returns true. If the ViewStateModeByIdAttribute class is not used, the LoadViewStateByID property of the control returns its default value of false, which means that the control does not load its view-state information by ID.

For more information about using attributes, see Extending Metadata Using Attributes.

The ViewStateModeByIdAttribute class does not apply to saving the view-state information for a control.

The ViewStateModeByIdAttribute class metadata attribute is valid only on class declarations.

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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