# bindingSourceSelectionMode

> This property controls whether every element in the list will get its data source setup automatically to the correct item in the collection's source.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.7/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
[UxmlAttribute]
public BindingSourceSelectionMode bindingSourceSelectionMode { get; set; }
```

### Remarks

When set to `AutoAssign`, the bind callbacks don't need to be specified, since bindings can be used to fill the elements.