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Template in ASP.NET Core TreeView control

The TreeView control allows you to customize the look of TreeView nodes by using the nodeTemplate property. This property accepts either template string or HTML element ID.

In the following sample, employee information such as employee photo, name, and designation have been included using the nodeTemplate property.

The template expression should be provided inside the ${...} interpolation syntax.

tagHelper
template.cs
templatemodel.cs
<ejs-treeview id="treedata" cssClass="custom" nodeTemplate="@Html.Raw("<div><img class=\"eimage\" src=\"https://ej2.syncfusion.com/demos/src/images/employees/${Image}.png\" alt=\"employee\"/><div class=\"ename\"> ${name} </div><div class=\"ejob\"> ${Job} </div></div>")">
    <e-treeview-fields dataSource="ViewBag.data" id="id" parentId="pid" text="name" hasChildren="HasChild" expanded="Expanded"></e-treeview-fields>
</ejs-treeview>

<style>
    .custom.e-treeview .e-fullrow {
        height: 72px;
    }

    .custom.e-treeview .e-list-text {
        line-height: normal;
    }

    .eimage {
        float: left;
        padding: 11px 16px 11px 0;
        height: 48px;
        width: 48px;
        box-sizing: content-box;
    }

    .ename {
        font-size: 16px;
        padding: 14px 0 0;
    }

    .ejob {
        font-size: 14px;
        opacity: .87;
    }
</style>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2CoreSampleBrowser.Models;

namespace EJ2CoreSampleBrowser.Controllers.TreeView
{
    public partial class TreeViewController : Controller
    {

        public IActionResult Template()
        {
            ViewBag.data = new TreeviewTemplate().getTreeviewTemplate();
            return View();
        }
    }
}
public class TreeviewTemplate
        {
            public string name { get; set; }
            public string count { get; set; }
            public int id { get; set; }
            public int pid { get; set; }
            public bool HasChild { get; set; }
            public bool Expanded { get; set; }
            public bool Selected { get; set; }
            public string Image { get; set; }
            public string Job { get; set; }
            public List<TreeviewTemplate> getTreeviewTemplate()
            {
                List<TreeviewTemplate> localData = new List<TreeviewTemplate>();
                localData.Add(new TreeviewTemplate { id = 1, name = "Steven Buchanan", HasChild = true, Expanded=true, Image = "10", Job= "CEO" });
                localData.Add(new TreeviewTemplate { id = 2, pid = 1, name = "Laura Callahan", count = "4", Image = "2", Job= "Product Manager", HasChild = true });
                localData.Add(new TreeviewTemplate { id = 3, pid = 2, name = "Andrew Fuller", Image = "7", Job= "Team Lead", HasChild= true });
                localData.Add(new TreeviewTemplate { id = 4, pid = 3, name = "Anne Dodsworth", count = "6", Image = "1", Job= "Developer" });
                localData.Add(new TreeviewTemplate { id = 5, pid= 1, name = "Nancy Davolio", HasChild = true, Image = "4", Job= "Product Manager" });
                localData.Add(new TreeviewTemplate { id = 6, pid = 5, name = "Michael Suyama", count = "20", Image = "9", Job= "Team Lead", HasChild = true });
                localData.Add(new TreeviewTemplate { id = 7, pid = 6, name = "Robert King", count = "5", Image = "8", Job= "Developer" });
                localData.Add(new TreeviewTemplate { id = 8, pid = 7, name = "Margaret Peacock", Image = "6" , Job= "Developer" });
                localData.Add(new TreeviewTemplate { id = 9, pid = 1, name = "Janet Leverling", Image = "3", Job= "HR" });
                return localData;
            }
        }

Output be like the below.

TreeView Sample

See Also