Inline editing is another editing mode of jqGrid. To invoke inline editing, just call the client-side jqGrid editRow method.

In this particular example, we are calling editRow on the client-side jqGrid RowSelect event, effectively making the row editable upon clicking on it.

Please, refer to the View tab for the javascript sample.
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using Trirand.Web.Core;

namespace CoreDemo.Models
{
    public class OrdersJqGridModel
    {
        public CoreGrid OrdersGrid { get; set; }

        public OrdersJqGridModel(HttpContext context)
        {
            OrdersGrid = new CoreGrid(context)
            {
                Columns = new List<CoreColumn>()
                {
                    new CoreColumn
                    {
                        // 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 CoreColumn
                    {
                        DataField = "CustomerId",
                        Editable = true,
                        Width = 100,
                        DataType = typeof(string),

                    },
                    new CoreColumn
                    {
                        DataField = "OrderDate",
                        Editable = true,
                        Width = 100,
                        DataFormatString = "{0:yyyy/MM/dd}",
                        DataType = typeof(DateTime)
                    },
                    new CoreColumn
                    {
                        DataField = "Freight",
                        Editable = true,
                        Width = 75,
                        DataType = typeof(double)
                    },
                    new CoreColumn
                    {
                        DataField = "ShipName",
                        Editable =  true,
                        Width = 150,
                        DataType = typeof(string)
                    }
                },

                Width = "640",
                Height = "250",
                
                ToolBarSettings = new ToolBarSettings
                {
                    ShowRefreshButton = true
                }
            };  
        }        
    }
}
@model CoreDemo.Models.OrdersJqGridModel
@using Trirand.Web.Core
@using CoreDemo.Models;

<!DOCTYPE html>
<html lang="en-us">
<head>
    <meta charset="utf-8">
    <title>jqGrid for ASP.NET Core - Edit Row Inline</title>    
    <!-- jQuery runtime minified -->
    <script src="~/js/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="~/js/trirand/i18n/grid.locale-en.js"></script>
    <!-- The jqGrid client-side javascript -->
    <script type="text/javascript" src="/js/trirand/coregrid.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="~/css/trirand/coregrid.css" />
</head>
<body>
    <div>
        @Html.Trirand().CoreGrid(Model.OrdersGrid, "EditRowInlineGrid")
    </div>
    <br /><br />
    <div>
         @await Component.InvokeAsync("CodeTabs", new { product = "grid", example = "editrowinline" })         
    </div>
    
    <script type="text/javascript">         
              
           var lastSelection;

           function editRow(id) {
               if (id && id !== lastSelection) {
                   var grid = $("#EditRowInlineGrid");
                   grid.restoreRow(lastSelection);
                   grid.editRow(id, true);
                   lastSelection = id;
               }
           }
       
       </script>
</body>
</html>


using System.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Mvc;
using CoreDemo.Models;
using Trirand.Web.Core;
using Microsoft.AspNetCore.Mvc.Rendering;
using Newtonsoft.Json;
using Microsoft.AspNetCore.Http;

namespace CoreDemo.Controllers.Grid
{
    public partial class GridController : Controller
    {
        // This is the default action for the View. Use it to setup your jqGrid Model.
        public ActionResult EditRowInline()
        {
            // Get the model (setup) of the grid defined in the /Models folder.
            var gridModel = new OrdersJqGridModel(HttpContext);
            // This method sets common properties for the grid, different than the default in the Model
            EditRowInline_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 CoreGrid.DataUrl property. We are doing this in the EditRowInline_SetUpGrid method.
        public JsonResult EditRowInline_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(HttpContext);
           
            var dataModel = EditRowInline_GetOrders().AsQueryable();

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

            // return the result of the DataBind method, passing the datasource as a parameter
            // jqGrid for ASP.NET Core 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 void EditRowInline_EditRow(Order editedOrder)
        {
            // Get the grid and database (northwind) models
            var gridModel = new OrdersJqGridModel(HttpContext);
            var northWindModel = new NorthWind();

            CoreGridEditData data = gridModel.OrdersGrid.GetEditData();

            // If we are in "Edit" mode, get the Order from database that matches the edited order
            // Check for "Edit" mode this way, we can also be in "Delete" or "Add" mode as well in this method
            if (gridModel.OrdersGrid.AjaxCallBackMode == AjaxCallBackMode.EditRow)
            {
                // Get the data from and find the Order corresponding to the edited row
                List<Order> orders = EditRowInline_GetOrders();
                Order orderToUpdate = orders.Single<Order>(o => o.OrderId == editedOrder.OrderId);

                // Update the Order information to match the edited Order data
                // In this demo we do not need to update the database since we are using Session
                // In your case you may need to actually hit the database
                orderToUpdate.OrderDate = editedOrder.OrderDate;
                orderToUpdate.CustomerId = editedOrder.CustomerId;
                orderToUpdate.Freight = editedOrder.Freight;
                orderToUpdate.ShipName = editedOrder.ShipName;

                // We are using Session for the sake of online example. 
                // In an actual scenario you may want to us somethting along the lines of northWindModel.SubmitChanges();
                HttpContext.Session.SetString("Orders", JsonConvert.SerializeObject(orders));
            }
        }

        public void EditRowInline_SetUpGrid(CoreGrid ordersGrid)
        {
            ordersGrid.DataUrl = Url.Action("EditRowInline_DataRequested");
            ordersGrid.EditUrl = Url.Action("EditRowInline_EditRow");
            ordersGrid.ClientSideEvents.RowSelect = "editRow";

            // setup the dropdown values for the CustomerId editing dropdown
            EditRowInline_SetUpCustomerIdColumn(ordersGrid);
        }

        private void EditRowInline_SetUpCustomerIdColumn(CoreGrid ordersGrid)
        {
            // setup the grid search criteria for the columns
            CoreColumn customersColumn = ordersGrid.Columns.Find(c => c.DataField == "CustomerId");
            customersColumn.Editable = true;
            customersColumn.EditType = EditType.DropDown;

            // Populate the search dropdown only on initial request, in order to optimize performance
            if (ordersGrid.AjaxCallBackMode == AjaxCallBackMode.RequestData)
            {
                var northWindModel = new NorthWind();
                var editList = from customers in northWindModel.Customers
                               select new SelectListItem
                               {
                                   Text = customers.CustomerId,
                                   Value = customers.CustomerId
                               };

                customersColumn.EditList = editList.ToList<SelectListItem>();
            }
        }


        // This is a helper method fetching the data from Session
        public List<Order> EditRowInline_GetOrders()
        {
            List<Order> orders;
            var value = HttpContext.Session.GetString("Orders");

            if (value == null)
            {
                var northWindModel = new NorthWind();
                orders = (from order in northWindModel.Orders
                          select order).ToList<Order>();

                HttpContext.Session.SetString("Orders", JsonConvert.SerializeObject(orders));
            }
            else
            {
                orders = JsonConvert.DeserializeObject<List<Order>>(value);
            }

            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/coregrid.css" />