ObjectDataSourceSelectingEventArgs Class

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

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.

Provides data for the Selecting event of the ObjectDataSource control.

public ref class ObjectDataSourceSelectingEventArgs : System::Web::UI::WebControls::ObjectDataSourceMethodEventArgs

public class ObjectDataSourceSelectingEventArgs : System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs

type ObjectDataSourceSelectingEventArgs = class
    inherit ObjectDataSourceMethodEventArgs

Public Class ObjectDataSourceSelectingEventArgs
Inherits ObjectDataSourceMethodEventArgs

Inheritance: Object

EventArgs

CancelEventArgs

ObjectDataSourceMethodEventArgs
ObjectDataSourceSelectingEventArgs

Remarks

The ObjectDataSourceSelectingEventArgs class is used in the OnSelecting method. Because it is derived from the ObjectDataSourceMethodEventArgs class, the ObjectDataSourceSelectingEventArgs class provides access to input parameters for validation and manipulation through the InputParameters property. The ObjectDataSourceSelectingEventArgs class also provides the ExecutingSelectCount property, which is used to check whether the currently executing data retrieval operation is retrieving a row count, in addition to the data. This is important because when data source paging is enabled, the Selecting event is raised twice. For more information, see ExecutingSelectCount.

The ObjectDataSource control exposes many events that you can handle to work with the underlying business object at various times in its life cycle. The following table lists the events and associated EventArgs classes and event handler delegates.

Event	`EventArgs`	`EventHandler`
ObjectCreating. Occurs immediately before the business object is instantiated.	ObjectDataSourceEventArgs	ObjectDataSourceObjectEventHandler
ObjectCreated. Occurs immediately after the business object is instantiated.	ObjectDataSourceEventArgs	ObjectDataSourceObjectEventHandler
Selecting. Occurs before the data is retrieved.	ObjectDataSourceSelectingEventArgs	ObjectDataSourceSelectingEventHandler
Inserting, Updating, and Deleting. Occur before an insert, update, or delete operation is performed.	ObjectDataSourceMethodEventArgs	ObjectDataSourceMethodEventHandler
Selected. Occurs after the data is retrieved.	ObjectDataSourceStatusEventArgs	ObjectDataSourceStatusEventHandler
Inserted, Updated, and Deleted. Occur after the insert, update, or delete operation is completed.	ObjectDataSourceStatusEventArgs	ObjectDataSourceStatusEventHandler
ObjectDisposing. Occurs before a business object is destroyed.	ObjectDataSourceDisposingEventArgs	ObjectDataSourceDisposingEventHandler

Constructors

ObjectDataSourceSelectingEventArgs(IOrderedDictionary, DataSourceSelectArguments, Boolean)

Initializes a new instance of the ObjectDataSourceSelectingEventArgs class.

Properties

Arguments	Provides a mechanism that the ObjectDataSource object can use to request data-related operations when data is retrieved.
Cancel	Gets or sets a value indicating whether the event should be canceled. (Inherited from CancelEventArgs)
ExecutingSelectCount	Gets a value indicating whether the ObjectDataSource is retrieving a row count during a data retrieval operation.
InputParameters	Gets a collection that contains business object method parameters and their values. (Inherited from ObjectDataSourceMethodEventArgs)

Methods

Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

Applies to

แชร์ผ่าน