# TreeView Selection

The TreeView lets the user select one or more nodes. You can also pre-select them with your own code.

You can configure the node selection behavior by setting the `SelectionMode` parameter to a member of the `TreeViewSelectionMode` enum:

* `None` - disable the node selection. This is the default setting.
* [`Single`](https://www.telerik.com/blazor-ui/documentation/components/treeview/selection/single)
* [`Multiple`](https://www.telerik.com/blazor-ui/documentation/components/treeview/selection/single)

You get or set the selected items through the `SelectedItems` parameter. It is an `IEnumerable<object>` collection. The selection allows two-way binding (`@bind-SelectedItems`) and one-way binding + [`SelectedItemsChanged`](https://www.telerik.com/blazor-ui/documentation/components/treeview/events#selecteditemschanged) event.

If you want to extract details for the selection from `SelectedItems`, you need to cast the collection to the correct model type. This is required because you can [bind the treeview](https://www.telerik.com/blazor-ui/documentation/components/treeview/data-binding/overview) to different model types at each level. The example below demonstrates this approach - we cast the selected item to the specific model in order to get its details and display them outside of the TreeView.

> caption Enable node selection

<demo metaUrl="client/treeview/selection/overview/example-1/" height="420"></demo>

## See Also

* [Live Demo: TreeView Selection](https://demos.telerik.com/blazor-ui/treeview/selection)
* [Single Selection](https://www.telerik.com/blazor-ui/documentation/components/treeview/selection/single)
* [Multiple Selection](https://www.telerik.com/blazor-ui/documentation/components/treeview/selection/multiple)
* [Apply Selection Styles Only on TreeView Item Text](https://www.telerik.com/blazor-ui/documentation/knowledge-base/treeview-node-selection-only-on-item-text)