ASP.NET MVC TreeMap Overview

The TreeMap displays hierarchical data in a traditional tree structure. TreeMaps also support different rendering types such us Squarified, Vertical, and Horizontal (slice and dice algorithm).

The Telerik UI TreeMap HtmlHelper for ASP.NET MVC is a server-side wrapper for the Kendo UI TreeMap widget.

To see the component in action, check the examples:

• Demo page for the TreeMap

Initializing the TreeMap

The following example demonstrates how to define a TreeMap by using the TreeMap TagHelper and the TreeMap HtmlHelper.

Razor

  @(Html.Kendo().TreeMap()
        .Name("treeMap")
        .DataSource(dataSource => dataSource
            .Read(read => read
                .Action("Population_Read", "TreeMap")
            )
            .Model(m => m.Children("Items"))
        )
        .ValueField("Value")
        .TextField("Name")
  )

Controler

    public ActionResult Population_Read()
    {
        var result = new List<Population>();

        var population = new Population("Parent One", 1, new List<Population>());

        population.Items.Add(new Population("Child 1", 2, null));
        population.Items.Add(new Population("Child 2", 3, null));

        result.Add(population);

        return Json(result);
    }

C#

    public class Population
    {
        public Population(string name, int value, List<Population> items)
        {
            this.Name = name;
            this.Value = value;
            this.Items = items;
        }
        public string Name { get; set; }

        public int Value { get; set; }

        public List<Population> Items { get; set; }
    }

Binding to Remote Data

You can also bind the DataSource to remote data. The following example demonstrates how to bind the Kendo UI TreeMap TagHelper to a remote service.

Razor

    @(Html.Kendo().TreeMap()
        .Name("treeMap")
        .DataSource(dataSource => dataSource
            .Read(read => read
                .Action("_PopulationUSA", "TreeMap")
            )
            .Model(m => m.Children("Items"))
        )
        .ValueField("Value")
        .TextField("Name")
        .HtmlAttributes(new { style = "height:600px; font-size: 12px;" })
    )

Setting Custom Color Ranges

You can customize the TreeMap through the Colors configuration option by adding the desired color ranges:

Razor

    @(Html.Kendo().TreeMap()
        .Name("treeMap")
        .DataSource(dataSource => dataSource
            .Read(read => read
                .Action("Population_Read", "TreeMap")
            )
            .Model(m => m.Children("Items"))
        )
        .Colors(color =>
        {
            color.AddRange("#0072c6", "#cbe2f3");
            color.AddRange("#5db2ff", "#deeffe");
            color.AddRange("#ff8f32", "#cbe7d0");
            color.AddRange("#82ba00", "#e5f0cb");
            color.AddRange("#ff8f32", "#fee8d5");
            color.AddRange("#9e0a61", "#eccedf");
            color.AddRange("#ac193d", "#eed0d7");
        })
        .ValueField("Value")
        .TextField("Name")
    )

Next Steps

• Getting Started with the TreeMap
• Basic Usage of the TreeMap for ASP.NET MVC (Demo)
• TreeMap Events

See Also

• Basic Usage of the TreeMap for ASP.NET MVC (Demo)

• Server-Side API