DevExtreme React - Search Nodes
Searching is disabled in the TreeView widget by default. Assign true to the searchEnabled option to display the search panel. The searchExpr option specifies which data fields should be searched. Assign an array of field names to it if you need to search several fields.
jQuery
var treeViewData = [ { key: '1', name: 'Fruits' }, { key: '1_1', name: 'Apples', count: 20, parent: '1' }, { key: '1_2', name: 'Oranges', count: 3, parent: '1' }, { key: '2', name: 'Vegetables' }, { key: '2_1', name: 'Cucumbers', count: 15, parent: '2' }, { key: '2_2', name: 'Tomatoes', count: 23, parent: '2' } ]; $(function() { $("#treeViewContainer").dxTreeView({ dataSource: treeViewData, dataStructure: 'plain', keyExpr: 'key', displayExpr: 'name', parentIdExpr: 'parent', searchEnabled: true, searchExpr: ["count", "name"] }); });
Angular
<dx-tree-view [dataSource]="treeViewData" dataStructure="plain" keyExpr="key" displayExpr="name" parentIdExpr="parent" [searchEnabled]="true" [searchExpr]="['count', 'name']"> </dx-tree-view>
import { DxTreeViewModule } from "devextreme-angular"; // ... export class AppComponent { treeViewData = [ { key: '1', name: 'Fruits' }, { key: '1_1', name: 'Apples', count: 20, parent: '1' }, { key: '1_2', name: 'Oranges', count: 3, parent: '1' }, { key: '2', name: 'Vegetables' }, { key: '2_1', name: 'Cucumbers', count: 15, parent: '2' }, { key: '2_2', name: 'Tomatoes', count: 23, parent: '2' } ]; } @NgModule({ imports: [ // ... DxTreeViewModule ], // ... })
When a user types a string in the input field, the TreeView suggests all nodes that contain this string. Assign 'startswith' to the searchMode option if you want the TreeView to suggest only those nodes that start with the input string.
jQuery
$(function() { $("#treeViewContainer").dxTreeView({ dataSource: treeViewData, dataStructure: 'plain', keyExpr: 'key', displayExpr: 'name', parentIdExpr: 'parent', searchEnabled: true, searchMode: "startswith" }); });
Angular
<dx-tree-view [dataSource]="treeViewData" dataStructure="plain" keyExpr="key" displayExpr="name" parentIdExpr="parent" [searchEnabled]="true" searchMode="startswith"> </dx-tree-view>
import { DxTreeViewModule } from "devextreme-angular"; // ... export class AppComponent { treeViewData = [ { key: '1', name: 'Fruits' }, { key: '1_1', name: 'Apples', count: 20, parent: '1' }, { key: '1_2', name: 'Oranges', count: 3, parent: '1' }, { key: '2', name: 'Vegetables' }, { key: '2_1', name: 'Cucumbers', count: 15, parent: '2' }, { key: '2_2', name: 'Tomatoes', count: 23, parent: '2' } ]; } @NgModule({ imports: [ // ... DxTreeViewModule ], // ... })
You can customize the search panel by specifying the searchEditorOptions option. The following code changes the panel's default width and placeholder:
jQuery
$(function() { $("#treeViewContainer").dxTreeView({ dataSource: treeViewData, dataStructure: 'plain', keyExpr: 'key', displayExpr: 'name', parentIdExpr: 'parent', searchEnabled: true, searchEditorOptions: { placeholder: "Type search value here...", width: 300 } }); });
Angular
<dx-tree-view [dataSource]="treeViewData" dataStructure="plain" keyExpr="key" displayExpr="name" parentIdExpr="parent" [searchEnabled]="true"> <dxo-search-editor-options placeholder="Type search value here..." [width]="300"> </dxo-search-editor-options> </dx-tree-view>
import { DxTreeViewModule } from "devextreme-angular"; // ... export class AppComponent { treeViewData = [ { key: '1', name: 'Fruits' }, { key: '1_1', name: 'Apples', count: 20, parent: '1' }, { key: '1_2', name: 'Oranges', count: 3, parent: '1' }, { key: '2', name: 'Vegetables' }, { key: '2_1', name: 'Cucumbers', count: 15, parent: '2' }, { key: '2_2', name: 'Tomatoes', count: 23, parent: '2' } ]; } @NgModule({ imports: [ // ... DxTreeViewModule ], // ... })
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.