Getting Started with the TreeMap

This tutorial explains how to set up a basic Telerik UI for ASP.NET MVC TreeMap and highlights the major steps in the configuration of the component.

You will initialize a TreeMap and learn how to resize it. Then, you will see how to attach an event handler to the component.

Sample Telerik UI for ASP.NET MVC TreeMap

Prerequisites

To successfully complete the tutorial, you need a project that is already configured to use the Telerik UI for ASP.NET MVC components:

To create a new pre-configured project for the Telerik UI for ASP.NET MVC components, you can use a project template.
To manually configure an existing project by using NuGet, see the Adding Telerik UI through NuGet.

1. Prepare the CSHTML File

The first step is to add the required directives at the top of the .cshtml document:

To use the Telerik UI for ASP.NET MVC HtmlHelpers:
```
@using Kendo.Mvc.UI
```

Optionally, you can structure the document by adding the desired HTML elements like headings, divs, paragraphs, and others.

@using Kendo.Mvc.UI
<h4>TreeMap with event handler</h4>
<p>
</p>

2. Initialize the TreeMap

Use the TreeMap HtmlHelper to add the component to a page:

The Name() configuration method is mandatory as its value is used for the id and the name attributes of the TreeMap element.
The ValueField() configuration method sets the data item field which contains the tile value.
The TextField() configuration method sets the data item field which contains the tile title.
The ColorField() configuration method sets the data item field which contains the tile color.

@using Kendo.Mvc.UI
<h4>TreeMap with event handler</h4>

<p>
    @(Html.Kendo().TreeMap()
          .Name("treeMap")
          .ValueField("value")
          .TextField("name")
          .ColorField("color")
    )
</p>

<script>
    $(document).ready(function(){
        var dataSource = new kendo.data.HierarchicalDataSource({
            data: [{
                name: "foo",
                value: 1,
                items: [{
                    name: "bar",
                    value: 1
                },{
                    name: "baz",
                    value: 1
                }]
            }],
            schema: {
                model: {
                    children: "items"
                }
            }
        });     

        var treeMap = $("#treeMap").getKendoTreeMap();
        treeMap.setDataSource(dataSource);
    })
</script>

3. Change the Theme Configuration of the TreeMap

The next step is to configure Theme configuration. You can do that by using the Theme() configuration.

@using Kendo.Mvc.UI
<h4>TreeMap with event handler</h4>

<p>
    @(Html.Kendo().TreeMap()
          .Name("treeMap")
          .ValueField("value")
          .TextField("name")
          .ColorField("color")
          .Theme("BlueOpal")
    )
</p>

<script>
    $(document).ready(function(){
        var dataSource = new kendo.data.HierarchicalDataSource({
            data: [{
                name: "foo",
                value: 1,
                items: [{
                    name: "bar",
                    value: 1
                },{
                    name: "baz",
                    value: 1
                }]
            }],
            schema: {
                model: {
                    children: "items"
                }
            }
        });     

        var treeMap = $("#treeMap").getKendoTreeMap();
        treeMap.setDataSource(dataSource);
    })
</script>

The Map exposes a DataBound() event that you can handle and assign specific functions to the component. In this tutorial, you will use the DataBound() event to display a message when data for the component is bounded.

@using Kendo.Mvc.UI
<h4>TreeMap with event handler</h4>

<p>
    @(Html.Kendo().TreeMap()
          .Name("treeMap")
          .ValueField("value")
          .TextField("name")
          .ColorField("color")
          .Theme("BlueOpal")
          .Events(e => e.DataBound("onDataBound"))
    )
</p>

<script>
    $(document).ready(function(){
        var dataSource = new kendo.data.HierarchicalDataSource({
            data: [{
                name: "foo",
                value: 1,
                items: [{
                    name: "bar",
                    value: 1
                },{
                    name: "baz",
                    value: 1
                }]
            }],
            schema: {
                model: {
                    children: "items"
                }
            }
        });     

        var treeMap = $("#treeMap").getKendoTreeMap();
        treeMap.setDataSource(dataSource);
    })

    function onDataBound(){
        console.log("Data bound");
    }
</script>

For more examples, refer to the demo on using the events of the TreeMap.

5. (Optional) Reference Existing TreeMap Instances

You can reference the Map instances that you have created and build on top of their existing configuration:

Use the id attribute of the component instance to establish a reference.

<script>
    var treeMap = $("#treeMap").getKendoTreeMap(); // treeMap is a reference to the existing treeMap instance of the helper.
</script>

Use the TreeMap client-side API to control the behavior of the widget. In this example, you will use the resize method to resize the element of the TreeMap. script <script> $("#treeMap").css("width", "800px"); // Set new width to the element. var treeMap = $("#treeMap").getKendoTreeMap(); // treeMap is a reference to the existing treeMap instance of the helper. treeMap.resize();// Apply the new width. </script> For more information on referencing specific helper instances, see the Methods and Events article.