Plain Data Structure
The TreeView's plain (one-dimensional) array contains items each of which references its parent item. Use either of the following properties to bind the component to plain data:
-
items[]
Assigns a local array as shown in this demo. -
dataSource
Assigns a DataSource object that allows you to perform data shaping operations and use a remote source.
Each object in the TreeView's plain data structure should include the following fields:
You can respectively use the keyExpr, parentIdExpr, and displayExpr properties to specify custom names for the above-mentioned fields. Node objects can also include developer-defined fields and properties from this help section: items[].
In this demo, nodes use the icon and expanded properties. These properties specify the icon and whether a node is collapsed or expanded. Some nodes also include the developer-defined price field.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
We appreciate your feedback.
We appreciate your feedback.
window.onload = function() {
var productName = ko.observable(""),
productPrice = ko.observable(""),
productImage = ko.observable("");
var viewModel = {
treeViewOptions: {
items: products,
dataStructure: "plain",
parentIdExpr: "categoryId",
keyExpr: "ID",
displayExpr: "name",
width: 300,
onItemClick: function(e) {
var item = e.itemData;
if(item.price) {
productImage(item.icon);
productName(item.name);
productPrice("$" + item.price);
} else {
productPrice("");
}
}
},
productName: productName,
productPrice: productPrice,
productImage: productImage
};
ko.applyBindings(viewModel, document.getElementById("treeview"));
};
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.5/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/21.1.5/js/dx.all.js"></script>
<script src="data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div class="form" id="treeview">
<div id="simple-treeview" data-bind="dxTreeView: treeViewOptions"></div>
<!-- ko if: productPrice() -->
<div id="product-details">
<img src="" data-bind="attr: { src: productImage }" />
<div class="name" data-bind="text: productName"></div>
<div class="price" data-bind="text: productPrice"></div>
</div>
<!-- /ko -->
</div>
</div>
</body>
</html>
#simple-treeview, #product-details {
display: inline-block;
}
#product-details {
vertical-align: top;
width: 400px;
height: 420px;
margin-left: 20px;
}
#product-details > img {
border: none;
height: 300px;
width: 400px;
}
#product-details > .name {
text-align: center;
font-size: 20px;
}
#product-details > .price {
text-align: center;
font-size: 24px;
}
.dark #product-details > div {
color: #f0f0f0;
}
.hidden {
visibility: hidden;
}
var products = [{
ID: "1",
name: "Stores",
expanded: true
}, {
ID: "1_1",
categoryId: "1",
name: "Super Mart of the West",
expanded: true
}, {
ID: "1_1_1",
categoryId: "1_1",
name: "Video Players"
}, {
ID: "1_1_1_1",
categoryId: "1_1_1",
name: "HD Video Player",
icon: "../../../../images/products/1.png",
price: 220
}, {
ID: "1_1_1_2",
categoryId: "1_1_1",
name: "SuperHD Video Player",
icon: "../../../../images/products/2.png",
price: 270
}, {
ID: "1_1_2",
categoryId: "1_1",
name: "Televisions",
expanded: true
}, {
ID: "1_1_2_1",
categoryId: "1_1_2",
name: "SuperLCD 42",
icon: "../../../../images/products/7.png",
price: 1200
}, {
ID: "1_1_2_2",
categoryId: "1_1_2",
name: "SuperLED 42",
icon: "../../../../images/products/5.png",
price: 1450
}, {
ID: "1_1_2_3",
categoryId: "1_1_2",
name: "SuperLED 50",
icon: "../../../../images/products/4.png",
price: 1600
}, {
ID: "1_1_2_4",
categoryId: "1_1_2",
name: "SuperLCD 55",
icon: "../../../../images/products/6.png",
price: 1750
}, {
ID: "1_1_2_5",
categoryId: "1_1_2",
name: "SuperLCD 70",
icon: "../../../../images/products/9.png",
price: 4000
}, {
ID: "1_1_3",
categoryId: "1_1",
name: "Monitors"
}, {
ID: "1_1_3_1",
categoryId: "1_1_3",
name: "19\"",
}, {
ID: "1_1_3_1_1",
categoryId: "1_1_3_1",
name: "DesktopLCD 19",
icon: "../../../../images/products/10.png",
price: 160
}, {
ID: "1_1_4",
categoryId: "1_1",
name: "Projectors"
}, {
ID: "1_1_4_1",
categoryId: "1_1_4",
name: "Projector Plus",
icon: "../../../../images/products/14.png",
price: 550
}, {
ID: "1_1_4_2",
categoryId: "1_1_4",
name: "Projector PlusHD",
icon: "../../../../images/products/15.png",
price: 750
}
];