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FormViewUpdateEventArgs Class

.NET Framework (current version)

Other Versions

Provides data for the ItemUpdating event.

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

Inheritance Hierarchy

System::Object
System::EventArgs
System.ComponentModel::CancelEventArgs
System.Web.UI.WebControls::FormViewUpdateEventArgs

Syntax

C++

public ref class FormViewUpdateEventArgs : CancelEventArgs

Constructors

	Name	Description
	FormViewUpdateEventArgs(Object^)	Initializes a new instance of the FormViewUpdateEventArgs class.

Properties

	Name	Description
	Cancel	Gets or sets a value indicating whether the event should be canceled.(Inherited from CancelEventArgs.)
	CommandArgument	Gets the command argument for the update operation passed to the FormView control.
	Keys	Gets a dictionary that contains the original key field name/value pairs for the record to update.
	NewValues	Gets a dictionary that contains the new field name/value pairs for the record to update.
	OldValues	Gets a dictionary that contains the original non-key field name/value pairs for the record to update.

Methods

	Name	Description
	Equals(Object^)	Determines whether the specified object is equal to the current object.(Inherited from Object.)
	Finalize()	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(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.)

The FormView control raises the ItemUpdating event when an Update button (a button with its CommandName property set to "Update") within the control is clicked, but before the FormView control updates the record. This allows you to provide an event-handling method that performs a custom routine, such as HTML encoding or validating the values of a record before updating it in the data source, whenever this event occurs.

A FormViewUpdateEventArgs object is passed to the event-handling method, which allows you to determine the value of an optional command argument sent to the FormView control and to indicate whether the update operation should be canceled. To determine the value of the command argument, use the CommandArgument property. To cancel the update operation, set the Cancel property to true. If you need to access the original key field values for the record being updated, use the Keys property. The original non-key field values can be accessed by using the OldValues property. Updated values (which include updated key field values, if you allow the user to edit key fields) are accessed using the NewValues property.

For more information about handling events, see NIB: Consuming Events.

For a list of initial property values for an instance of the FormViewUpdateEventArgs class, see the FormViewUpdateEventArgs constructor.

Examples

The following example demonstrates how to use the FormViewUpdateEventArgs object passed to the event-handling method for the ItemUpdating event to validate the values entered by the user.

C++

No code example is currently available or this language may not be supported.