Guide on incorporating dxTreeView with AngularJS

Hello there, I am trying to utilize the dx-tree-view component. In my Home.html file, I have included the following HTML code:

<div dx-tree-view="treeViewOptions"></div>

And in my HomeController.js:

$scope.treeViewOptions = {
        bindingOptions: {
            dataSource: 'myPhoneItems'
        },
        keyExpr: 'id',
        displayExpr: 'caption',
        parentIdExpr: 'parentId',
        virtualModeEnabled: true
    }

My application features buttons for both Create New Category and Create New Phone. When creating a new phone, the form includes a select box with categories, where data is stored in an array of objects that resemble this structure: https://i.sstatic.net/QcM7y.png

Upon adding some phones to my page: https://i.sstatic.net/VS6km.png, when I add the line dataStructure: "plain" within $scope.treeViewOptions = {...}, nothing is displayed. Perhaps someone here knows how to rectify this? Thank you for your assistance!

Answer №1

It seems that the root item was not specified in your code:

When the dataStructure option is set to 'plain', the widget necessitates the specification of at least one root item. A root item is identified by having a parentId field with a value of 0 or null.

For more information, refer to this documentation.

In the provided sample, no item with parentId = 0 or null is visible. Nevertheless, you can assign any parentId to specify the root level by utilizing the rootValue option:

$scope.treeViewOptions = {
    //...
    rootValue: 1
};

I have created a small example demonstrating this in action.

I hope this information proves useful!

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