How to Create Nested WebGrid with Expand/Collapse in ASP.NET MVC4.


In this post, I explain How to Create Nested WebGrid with Expand/Collapse in ASP.NET MVC4. In one of an article I have explained how to create master details entry form in MVC application .

Steps :

Step - 1 : Create New Project.

Go to File > New > Project > Select MVC4 web application > Entry Application Name > Click OK > Select Internet Application > Select view engine Razor > OK

Step-2: Add a Database.

Go to Solution Explorer > Right Click on App_Data folder > Add > New item > Select SQL Server Database Under Data > Enter Database name > Add.

Step-3: Create table for fetch data.

Open Database > Right Click on Table > Add New Table > Add Columns > Save > Enter table name > Ok.
In this example, I have used two tables as below

Step-4: Add Entity Data Model.

Go to Solution Explorer > Right Click on Project name form Solution Explorer > Add > New item > Select Entity Data Model under data > Enter model name > Add.
A popup window will come (Entity Data Model Wizard) > Select Generate from database > Next >
Chose your data connection > select your database > next > Select tables > enter Model Namespace > Finish.

Step-5: Add a class for create a view model.

1st : Add a folder.
Go to Solution Explorer > Right Click on the project > add > new folder.
2nd : Add a class on that folder
Go to Solution Explorer > Right Click on that folder > Add > Class... > Enter Class name > Add.
write the following code in this class

             using System.Collections.Generic;

            namespace MVCNestedWebgrid.ViewModel
                public class OrderVM
                    public OrderMaster order { get; set; }
                    public List<OrderDetail> orderDetails { get; set; }

Step-6: Add a new Controller.

Go to Solution Explorer > Right Click on Controllers folder form Solution Explorer > Add > Controller > Enter Controller name > Select Templete "empty MVC Controller"> Add.

Step-7: Add new action into your controller for show nested data in a webgrid.

Here I have added "List" Action into "Order" Controller. Please write this following code

             public ActionResult List()
                List<OrderVM> allOrder = new List<OrderVM>();

                // here MyDatabaseEntities is our data context
                using (MyDatabaseEntities dc = new MyDatabaseEntities())
                    var o = dc.OrderMasters.OrderByDescending(a => a.OrderID);
                    foreach (var i in o)
                        var od = dc.OrderDetails.Where(a => a.OrderID.Equals(i.OrderID)).ToList();
                        allOrder.Add(new OrderVM { order= i, orderDetails = od });
                return View(allOrder);

Step-8: Add view for the Action & design.

Right Click on Action Method (here right click on form action) > Add View... > Enter View Name > Select View Engine (Razor) > Check "Create a strong-typed view" > Select your model class > Add.
[N:B:Please Rebuild solution before add view.]
Html Code
            @model IEnumerable<MVCNestedWebgrid.ViewModel.OrderVM>

                ViewBag.Title = "Order List";
                WebGrid grid = new WebGrid(source: Model, canSort: false);

            <div id="main" style="padding:25px; background-color:white;">
                htmlAttributes: new {id="gridT", width="700px" },
                        grid.Column("order.OrderID","Order ID"),
                        grid.Column(header:"Order Date",format:(item)=> string.Format("{0:dd-MM-yyyy}",item.order.OrderDate)),
                        grid.Column("order.CustomerName","Customer Name"),
                            WebGrid subGrid = new WebGrid(source: item.orderDetails);
                            return subGrid.GetHtml(
                                htmlAttributes: new { id="subT" },
                                        subGrid.Column("Quantity", "Quantity"),
                                        subGrid.Column("Rate", "Rate"),
                                        subGrid.Column("Amount", "Amount")
Css Code

            th, td {
                    background-color:rgb(248, 248, 248);        
                #gridT,  #gridT tr {
                    border:1px solid #0D857B;
                #subT,#subT tr {
                    border:1px solid #f3f3f3;
                #subT {
                    margin:0px 0px 0px 10px;
                #subT th {
                .hoverEff {
                .hoverEff:hover {
                    background-color:rgb(248, 242, 242);
                .expand {
                    background-image: url(/Images/pm.png);
                    background-position-x: -22px;
                .collapse  {
                    background-image: url(/Images/pm.png);
                    background-position-x: -2px; 

Write the following Jquery code for make webgrid collapsible
            $(document).ready(function () {
                var size = $("#main #gridT > thead > tr >th").size(); // get total column
                $("#main #gridT > thead > tr >th").last().remove(); // remove last column
                $("#main #gridT > thead > tr").prepend("<th></th>"); // add one column at first for collapsible column
                $("#main #gridT > tbody > tr").each(function (i, el) {
                            .attr('title',"click for show/hide")

                    //Now get sub table from last column and add this to the next new added row
                    var table = $("table", this).parent().html();
                    //add new row with this subtable
                    $(this).after("<tr><td></td><td style='padding:5px; margin:0px;' colspan='" + (size - 1) + "'>" + table + "</td></tr>");
                    $("table", this).parent().remove();
                    $(".hoverEff", this).live("click", function () {
                        $(this).toggleClass("expand collapse");

                //by default make all subgrid in collapse mode
                $("#main #gridT > tbody > tr td.expand").each(function (i, el) {
                    $(this).toggleClass("expand collapse");

Step-9: Run Application.

Download Application     Live Demo

Hello ! My name is Sourav Mondal. I am a software developer working in Microsoft .NET technologies since 2010.

I like to share my working experience, research and knowledge through my site.

I love developing applications in Microsoft Technologies including Asp.Net webforms, mvc, winforms,, sql server, entity framework, Ajax, Jquery, web api, web service and more.