# dragAndDropUpdate

> Called when a drag operation updates in this collection view.

## Definition

* **Type:** Event
* **Namespace:** [UnityEngine.UIElements](/engine/6000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public event Func<HandleDragAndDropArgs, DragVisualMode> dragAndDropUpdate
```