React TreeView - Use Plain Data
If you use plain data in the TreeView, set the dataStructure property to "plain". For an example of plain data, see the following code snippet.
- var plainData = [
- { id: '1', text: 'Fruits' },
- { id: '1_1', text: 'Apples', parentId: '1' },
- { id: '1_2', text: 'Oranges', parentId: '1' },
- { id: '2', text: 'Vegetables' },
- { id: '2_1', text: 'Cucumbers', parentId: '2' },
- { id: '2_2', text: 'Tomatoes', parentId: '2' }
- ];
- $(function() {
- $("#treeViewContainer").dxTreeView({
- dataSource: plainData,
- dataStructure: 'plain'
- });
- });
As you can see, all items in a plain data source have the id and text fields, and items that have a parent, have the parentId field. Those are conventional field names. To use other names, change the keyExpr, displayExpr and parentIdExpr properties, respectively.
- var plainData = [
- { key: '1', name: 'Fruits' },
- { key: '1_1', name: 'Apples', parent: '1' },
- { key: '1_2', name: 'Oranges', parent: '1' },
- { key: '2', name: 'Vegetables' },
- { key: '2_1', name: 'Cucumbers', parent: '2' },
- { key: '2_2', name: 'Tomatoes', parent: '2' }
- ];
- $(function() {
- $("#treeViewContainer").dxTreeView({
- dataSource: plainData,
- dataStructure: 'plain',
- keyExpr: 'key',
- displayExpr: 'name',
- parentIdExpr: 'parent'
- });
- });
Frequently, the id of an item is also its text. In this case, set both the keyExpr and displayExpr properties to a single value.
- var plainData = [
- { name: 'Fruits' },
- { name: 'Apples', parentId: 'Fruits' },
- { name: 'Oranges', parentId: 'Fruits' },
- { name: 'Vegetables' },
- { name: 'Cucumbers', parentId: 'Vegetables' },
- { name: 'Tomatoes', parentId: 'Vegetables' }
- ];
- $(function() {
- $("#treeViewContainer").dxTreeView({
- dataSource: plainData,
- dataStructure: 'plain',
- keyExpr: 'name',
- displayExpr: 'name'
- });
- });
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.