Available in the Full Version
Tree - Load on Demand
This sample demonstrates the load-on-demand capabilities of the tree control by configuring the ASP.NET MVC helper.
This sample uses CTP (Community Technical Preview) features. The API and behavior may change when these features are released with full support.
This sample is designed for a larger screen size.
On mobile, try rotating your screen, view full size, or email to another device.
Load-on-demand ensures that only data requested by the user is loaded into the control.
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@using Infragistics.Web.Mvc
@using IgniteUI.SamplesBrowser.Models
@model IEnumerable<IgniteUI.SamplesBrowser.Models.Northwind.Category>
<!DOCTYPE html>
<html>
<head>
<title></title>
<!-- Ignite UI for jQuery Required Combined CSS Files -->
<link href="http://cdn-na.infragistics.com/igniteui/2023.2/latest/css/themes/infragistics/infragistics.theme.css" rel="stylesheet" />
<link href="http://cdn-na.infragistics.com/igniteui/2023.2/latest/css/structure/infragistics.css" rel="stylesheet" />
<script src="http://ajax.aspnetcdn.com/ajax/modernizr/modernizr-2.8.3.js"></script>
<script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
<script src="http://code.jquery.com/ui/1.11.1/jquery-ui.min.js"></script>
<!-- Ignite UI for jQuery Required Combined JavaScript Files -->
<script src="http://cdn-na.infragistics.com/igniteui/2023.2/latest/js/infragistics.core.js"></script>
<script src="http://cdn-na.infragistics.com/igniteui/2023.2/latest/js/infragistics.lob.js"></script>
</head>
<body>
@(Html.Infragistics().Tree()
.DataSource(Model)
.Bindings(b =>
b.TextKey("CategoryName")
.PrimaryKey("ID")
.ValueKey("ID")
.ChildDataProperty("Products")
.Bindings(b2 =>
b2.TextKey("ProductName")
.PrimaryKey("ID")
.ValueKey("ID")
)
)
.DataSource(Model)
.LoadOnDemand(true)
.DataSourceUrl(Url.Action("tree-data-on-demand"))
.DataBind()
.Render()
)
</body>
</html>
using IgniteUI.SamplesBrowser.Models.Northwind;
using IgniteUI.SamplesBrowser.Models.Repositories;
using Infragistics.Web.Mvc;
using System.Collections.Generic;
using System.Web.Mvc;
namespace IgniteUI.SamplesBrowser.Controllers
{
public class TreeController : Controller
{
//
// GET: /Tree/
[ActionName("aspnet-mvc-helper")]
public ActionResult AspNetMvcHelper()
{
IEnumerable<Category> categories = RepositoryFactory.GetCategoryRepository().Get();
return View("aspnet-mvc-helper", categories);
}
[ActionName("aspnet-mvc-load-on-demand")]
public ActionResult AspNetLoadOnDemand()
{
IEnumerable<Category> categories = RepositoryFactory.GetCategoryRepository().Get();
return View("aspnet-mvc-load-on-demand", categories);
}
[ActionName("tree-data-on-demand")]
public JsonResult TreeDataOnDemand(string path, string binding, int depth)
{
TreeModel model = new TreeModel();
switch (depth)
{
case 0:
model.DataSource = RepositoryFactory.GetCategoryRepository().Get();
break;
default:
model.DataSource = RepositoryFactory.GetCategoryRepository().Get();
break;
}
return model.GetData(path, binding);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace IgniteUI.SamplesBrowser.Models.Northwind
{
public class Category
{
public int ID { get; set; }
public string CategoryName { get; set; }
public string Description { get; set; }
public string ImageUrl { get; set; }
public int ProductCount { get; set; }
public IEnumerable<Product> Products { get; set; }
}
}