You can initiate row deleting from the toolbar (recycle bin button) or from an external control. In this example, we are using the toolbar ToolBarSettings.ShowDeleteButton=True

Just handle the RowDeleting event on the server. It is callled via ajax request from jqGrid and in the event arguments you will have the primary key of the row to delete (eventArgs.RowKey). Then just locate the row in your datasource, delete it and rebind the grid.

In this example we have used ADO.NET as a sample datasource, but this approach will work for any type of datasource you have.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;
using Trirand.Web.Mvc;

namespace MVCDemo.Models
{
    public class OrdersJqGridModel
    {
        public JQGrid OrdersGrid { get; set; }

        public OrdersJqGridModel()
        {
            OrdersGrid = new JQGrid
            {
                Columns = new List<JQGridColumn>()
                {
                    new JQGridColumn 
                    {
                        // Always set PrimaryKey for Add,Edit,Delete operations
                        // If not set, the first column will be assumed as primary key
                        DataField = "OrderID",                                        
                        PrimaryKey = true,
                        Editable = false,
                        Width = 50,
                        DataType = typeof(int)
                    },                                    
                    new JQGridColumn 
                    { 
                        DataField = "CustomerID", 
                        Editable = true,
                        Width = 100,
                        DataType = typeof(string)
                    },
                    new JQGridColumn 
                    { 
                        DataField = "OrderDate",                                                         
                        Editable = true,
                        Width = 100, 
                        DataFormatString = "{0:yyyy/MM/dd}",
                        DataType = typeof(DateTime)
                    },
                    new JQGridColumn
                    { 
                        DataField = "Freight", 
                        Editable = true,
                        Width = 75,
                        DataType = typeof(double)
                    },
                    new JQGridColumn 
                    { 
                        DataField = "ShipName",
                        Editable =  true,
                        Width = 150,
                        DataType = typeof(string)
                    }
                },
                
                Width = Unit.Pixel(640),
                Height = Unit.Percentage(100),
                
                ToolBarSettings = new ToolBarSettings
                {
                    ShowRefreshButton = true
                }
            };  
        }        
    }
}
@model MVCDemo.Models.OrdersJqGridModel
@using Trirand.Web.Mvc
@using MVCDemo.Models

<!DOCTYPE html>
<html lang="en-us">
<head>
    <meta charset="utf-8">
    <title>jqGrid for ASP.NET MVC - Delete Row Dialog</title>    
    <!-- jQuery runtime minified -->
    <script src="~/Scripts/jquery-3.2.1.min.js" type="text/javascript"></script>
    <!-- The jqGrid localization file we need, English in this case -->
    <script type="text/javascript" src="~/Scripts/trirand/i18n/grid.locale-en.js"></script>
    <!-- The jqGrid client-side javascript -->
    <script type="text/javascript" src="~/Scripts/trirand/jquery.jqGrid.min.js"></script>

    <!-- The jQuery UI theme that will be used by the grid. -->
    <link rel="stylesheet" type="text/css" href="http://code.jquery.com/ui/1.12.1/themes/redmond/jquery-ui.css" />
    <!-- The jQuery UI theme extension jqGrid needs -->    
    <link rel="stylesheet" type="text/css" href="~/Content/themes/ui.jqgrid.css" />
</head>
<body>
    <div>
        @Html.Trirand().JQGrid(Model.OrdersGrid, "DeleteDialogGrid")
    </div>
    <br /><br />
    <div>
          
    </div>
</body>
</html>


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MVCDemo.Models;
using Trirand.Web.Mvc;

namespace MVCDemo.Controllers.Grid
{
    public partial class GridController : Controller
    {
        // This is the default action for the View. Use it to setup your jqGrid Model.
        public ActionResult EditDelDialog()
        {
            // Get the model (setup) of the grid defined in the /Models folder.
            var gridModel = new OrdersJqGridModel();
            // This method sets common properties for the grid, different than the default in the Model
            EditDelDialog_SetUpGrid(gridModel.OrdersGrid);

            // Pass the custmomized grid model to the View
            return View(gridModel);
        }

        // This method is called when the grid requests data. You can choose any method to call
        // by setting the JQGrid.DataUrl property. We are doing this in the EditDelDialog_SetUpGrid method.
        public JsonResult EditDelDialog_DataRequested()
        {
            // Get both the grid and data models. For data model, make sure IQueryable is implemented (most linq-2-* cases)
            // The data model in our case is an autogenerated linq2sql database based on Northwind.
            var gridModel = new OrdersJqGridModel();
            var dataModel = GetOrders().AsQueryable();

            // This method sets common properties for the grid, different than the default in the Model
            EditDelDialog_SetUpGrid(gridModel.OrdersGrid);

            // return the result of the DataBind method, passing the datasource as a parameter
            // jqGrid for ASP.NET MVC automatically takes care of paging, sorting, filtering/searching, etc
            return gridModel.OrdersGrid.DataBind(dataModel);
        }

        // The data gets passed to the controller as strongly typed objects of your data model, Order in our case
        // This functionality is called Model Binders in ASP.NET MVC terms
        public ActionResult EditDelDialog_EditRow(Order editedOrder)
        {
            // Get the grid and database (northwind) models
            var gridModel = new OrdersJqGridModel();
            var northWindModel = new NorthwindDataContext();

            // If we are in "DeleteRow" mode, get the Order from database that matches the edited order
            // Check for "DeleteRow" mode this way, we can also be in "Edit" or "Add" mode as well in this method
            if (gridModel.OrdersGrid.AjaxCallBackMode == AjaxCallBackMode.DeleteRow)
            {
                List<Order> gridData = GetOrders();
                // locate the order that needs to be deleted
                Order order = gridData.Single<Order>(o => o.OrderID == editedOrder.OrderID);

                // you can validate/check if the row can be deleted and cancel that with
                // return gridModel.OrdersGrid.ShowEditValidationMessage("Cannot delete this row for some reason.");
                // if there is no need to validate on editing, you can return nothing/void from this method, instead of ActionResult

                // delete the record
                gridData.Remove(order);               
                
                // In this demo we do not need to update the database since we are using Session
                // However you will need to persist that to the database most probably in your scenario                
                //northWindModel.Orders.DeleteOnSubmit(order);
                //northWindModel.SubmitChanges();
            }

            // Optional - if there is no validation, you can just declare that method as void/nothing and simply do not return anything
            return new ContentResult { Content = "" };
        }

        public void EditDelDialog_SetUpGrid(JQGrid ordersGrid)
        {
            ordersGrid.DataUrl = Url.Action("EditDelDialog_DataRequested");
            ordersGrid.EditUrl = Url.Action("EditDelDialog_EditRow");
            ordersGrid.ToolBarSettings.ShowDeleteButton = true;
            ordersGrid.DeleteDialogSettings.ReloadAfterSubmit = true;
        }

        // This is a helper method fetching the data from Session
        public List<Order> EditDelDialog_GetOrders()
        {
            List<Order> orders;
            if (Session["Orders"] == null)
            {
                var northWindModel = new NorthwindDataContext();
                orders = (from order in northWindModel.Orders
                          select order).ToList<Order>();
                Session["Orders"] = orders;
            }
            else
            {
                orders = Session["Orders"] as List<Order>;
            }

            return orders;
        }
    }
}
Switch theme:


Theming is based on the very popular jQuery ThemeRoller standard. This is the same theming mechanism used by jQuery UI and is now a de-facto standard for jQuery based components. The benefits of using ThemeRoller are huge. We can offer a big set of ready to use themes created by professional designers, including Windows-like themes (Redmond), Apple-like theme (Cupertino), etc. In addition to that any jQuery UI controls on the same page will pick the same theme.

Last, but not least, you can always roll your own ThemeRoller theme, using the superb Theme Editor

To use a theme, simply reference 2 Css files in your Html <head> section - the ThemeRoller theme you wish to use, and the jqGrid own ThemeRoller Css file. For example (Redmond theme):

<link rel="stylesheet" type="text/css" media="screen" href="/themes/redmond/jquery-ui-1.8.2.custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />