jqGrid ASP.NET example with SqlDataSource

Info
ASPX
C#
Themes

You can hook the server-side DataRequesting event in order to hook custom code to page index changing. This is especially useful in performance-critical scenarios, where you need to only fetch the right number of rows from the database (as opposed to all of them at once).

You can use NewPageIndex from the event arguments and PagerSettings.PageSize in order to calculate which rows you need for this page. Note that NewPageIndex is NOT zero-based (first page is 1).

NOTE: If you are using DataRequesting event you need to set the eventArgs.TotalRows property of the event arguments to the total number of rows in the datagrid.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="GridTest.examples.paging.custom._default" %>
<%@ Register Assembly="Trirand.Web" TagPrefix="trirand" Namespace="Trirand.Web.UI.WebControls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>jqGrid ASP.NET example with SqlDataSource</title>
    <!-- The jQuery UI theme that will be used by the grid -->
    <link rel="stylesheet" type="text/css" media="screen" href="/themes/redmond/jquery-ui-1.8.2.custom.css" />
    <!-- The jQuery UI theme extension jqGrid needs -->
    <link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />
    <!-- jQuery runtime minified -->
    <script src="/js/jquery-1.4.2.min.js" type="text/javascript"></script>
    <!-- The localization file we need, English in this case -->
    <script src="/js/i18n/grid.locale-en.js" type="text/javascript"></script>
    <!-- The jqGrid client-side javascript -->
    <script src="/js/jquery.jqGrid.min.js" type="text/javascript"></script>    
    <!-- This jQuery UI library is needed only for the code tabs, not needed by the grid per se -->
    <script src="/js/jquery-ui-1.8.2.custom.min.js" type="text/javascript"></script>    
    <style type="text/css">    
        body, html { font-size: 80%; }    
    </style>
</head>


<body>
    <form id="form1" runat="server">

    <asp:SqlDataSource runat="server" ID="SqlDataSource1" 
        ConnectionString="<%$ ConnectionStrings:SQL2008_449777_fhsConnectionString %>"                 
        SelectCommand="SELECT [OrderID], [RequiredDate], [ShipName], [ShipCity], [Freight] FROM [Orders]">
    </asp:SqlDataSource>  
        
    <trirand:JQGrid runat="server" ID="JQGrid1" Width="600px" 
         OnDataRequesting="JQGrid1_DataRequesting">         
        <Columns>
            <trirand:JQGridColumn DataField="OrderID" HeaderText="Order ID" PrimaryKey="True" Width="50" />
            <trirand:JQGridColumn DataField="RequiredDate" DataFormatString="{0:d}"/>
            <trirand:JQGridColumn DataField="ShipName" Width="200" />
            <trirand:JQGridColumn DataField="ShipCity" />
            <trirand:JQGridColumn DataField="Freight" />
        </Columns>
        <ToolBarSettings ShowSearchButton="true" />
        <PagerSettings PageSize="10" PageSizeOptions="[5,10,15]" />
    </trirand:JQGrid>
    
    <br /><br />    
    
    <trirand:codetabs runat="server" id="tabs"></trirand:codetabs>  
    
    </form>
</body>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using GridTest.dbml;
using Trirand.Web.UI.WebControls;

namespace GridTest.examples.paging.custom
{
    public partial class _default : System.Web.UI.Page
    {
        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);            
            JQGrid1.DataRequesting += new JQGrid.JQGridDataRequestEventHandler(JQGrid1_DataRequesting);
        }

        public void JQGrid1_DataRequesting(object sender, JQGridDataRequestEventArgs e)
        {
            NorthWindDataClassesDataContext northWind = new NorthWindDataClassesDataContext();

            List<Order> orders = (List<Order>)Cache["Orders"];
            e.TotalRows = (int)Cache["TotalRecords"];
            JQGrid1.DataSource = orders.AsQueryable<Order>()
                                        .Skip<Order>((e.NewPageIndex - 1) * JQGrid1.PagerSettings.PageSize)
                                        .Take<Order>(JQGrid1.PagerSettings.PageSize);
            JQGrid1.DataBind();
        }       

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack && JQGrid1.AjaxCallBackMode == AjaxCallBackMode.None)
            {
                NorthWindDataClassesDataContext northWind = new NorthWindDataClassesDataContext();
                IQueryable<Order> orders = northWind.Orders.Take<Order>(northWind.Orders.Count<Order>());
                Cache["Orders"] = orders.ToList<Order>();
                Cache["TotalRecords"] = orders.Count<Order>();
            }
        }
      
    }
}

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-1.8.1.custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />