ObjectDataSourceSelectingEventArgs Class
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ObjectDataSourceSelectingEventArgs Class

 

Provides data for the Selecting event of the ObjectDataSource control.

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

System.Object
  System.EventArgs
    System.ComponentModel.CancelEventArgs
      System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs
        System.Web.UI.WebControls.ObjectDataSourceSelectingEventArgs

public class ObjectDataSourceSelectingEventArgs : ObjectDataSourceMethodEventArgs

NameDescription
System_CAPS_pubmethodObjectDataSourceSelectingEventArgs(IOrderedDictionary, DataSourceSelectArguments, Boolean)

Initializes a new instance of the ObjectDataSourceSelectingEventArgs class.

NameDescription
System_CAPS_pubpropertyArguments

Provides a mechanism that the ObjectDataSource object can use to request data-related operations when data is retrieved.

System_CAPS_pubpropertyCancel

Gets or sets a value indicating whether the event should be canceled.(Inherited from CancelEventArgs.)

System_CAPS_pubpropertyExecutingSelectCount

Gets a value indicating whether the ObjectDataSource is retrieving a row count during a data retrieval operation.

System_CAPS_pubpropertyInputParameters

Gets a collection that contains business object method parameters and their values.(Inherited from ObjectDataSourceMethodEventArgs.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

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

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

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

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

.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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