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Help Version 19.0.2017.10.27
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Provides data for the LeadCollection.CollectionChanged event.
function lt.NotifyLeadCollectionChangedEventArgsextends System.EventArgs
class lt.NotifyLeadCollectionChangedEventArgs()extends System.EventArgs
When checking for changes in LeadCollection.CollectionChanged, it is better practice to check the values of OldItems and NewItems than Action, to prevent cases where a NotifyLeadCollectionChangedAction case is missed or incorrectly handled.
See LeadCollection.CollectionChanged for an example of handling these arguments.
NotifyLeadCollectionChangedEventArgs will vary based on the Action that occurred:
| Action | OldStartingIndex | OldItems | NewStartingIndex | NewItems |
|---|---|---|---|---|
| Add | default (-1) | default (empty) | Index of Insertion | Inserted Items |
| Remove | Index of Deletion | Deleted Items | default (-1) | default (empty) |
| Move | Old Index | Moved Items | New Index | Moved Items |
| Replace | Index | Replaced Items | Index | New Items |
| Reset | 0 | All Items | default (-1) | default (empty) |
*: For a Move action, OldItems and NewItems will have the same items.
**: For a Replace action, OldStartingIndex and NewStartingIndex will be the same.