CollectionChangeEventArgs::Action Property
Gets an action that specifies how the collection changed.
Assembly: System (in System.dll)
Property Value
Type: System.ComponentModel::CollectionChangeActionOne of the CollectionChangeAction values.
This property can have one of the following values:
Action | Property value |
|---|---|
An element was added to the collection | CollectionChangeAction.Add |
An element was removed from the collection | CollectionChangeAction.Remove |
The collection was completely changed | CollectionChangeAction.Refresh |
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the AutoCompleteStringCollection::CollectionChanged event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox::Show with Console::WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type AutoCompleteStringCollection named AutoCompleteStringCollection1. Then ensure that the event handler is associated with the AutoCompleteStringCollection::CollectionChanged event.
Available since 1.1