BindingsCollection.OnCollectionChanging(CollectionChangeEventArgs) Method

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Source:

BindingsCollection.cs

Raises the CollectionChanging event.

C#

protected virtual void OnCollectionChanging(System.ComponentModel.CollectionChangeEventArgs e);

Parameters

e

CollectionChangeEventArgs

A CollectionChangeEventArgs that contains event data.

Remarks

The CollectionChanging event occurs when the event is about to change.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnCollectionChanging method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnCollectionChanging(CollectionChangeEventArgs) in a derived class, be sure to call the base class's OnCollectionChanging(CollectionChangeEventArgs) method so that registered delegates receive the event.

Applies to