New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Marketing Assistant	Jaime Yorres	Germany	1 2 3 4 5
2	Marketing Manager	Matti Karttunen	Bulgaria	1 2 3 4 5
3	Owner	Howard Snyder	England	1 2 3 4 5
4	Sales Manager	Patricio Simpson	Germany	1 2 3 4 5
5	Sales Associate	Pascale Cartrain	Germany	1 2 3 4 5
6	Sales Associate	Hanna Moos	Brazil	1 2 3 4 5
7	Marketing Manager	Howard Snyder	Germany	1 2 3 4 5
8	Owner	Howard Snyder	Spain	1 2 3 4 5
9	Accountant	Georg Pipps	France	1 2 3 4 5
10	Sales Agent	Pascale Cartrain	Brazil	1 2 3 4 5
11	Owner	Elizabeth Lincoln	Germany	1 2 3 4 5
12	Owner	Matti Karttunen	Spain	1 2 3 4 5
13	Marketing Assistant	Patricio Simpson	Bulgaria	1 2 3 4 5
14	Accounting Manager	Paul Henriot	USA	1 2 3 4 5
15	Sales Agent	Hanna Moos	USA	1 2 3 4 5
16	Owner	Hanna Moos	France	1 2 3 4 5
17	Sales Manager	Georg Pipps	Bulgaria	1 2 3 4 5
18	Sales Consultant	Hanna Moos	Spain	1 2 3 4 5
19	Sales Agent	Patricio Simpson	Argentina	1 2 3 4 5
20	Sales Agent	Matti Karttunen	Austria	1 2 3 4 5
21	Marketing Assistant	Hanna Moos	Austria	1 2 3 4 5
22	Sales Agent	Paul Henriot	Spain	1 2 3 4 5
23	Sales Agent	Howard Snyder	USA	1 2 3 4 5
24	Sales Consultant	Paul Henriot	Austria	1 2 3 4 5
25	Accounting Manager	Paul Henriot	Argentina	1 2 3 4 5
26	Accounting Manager	Patricio Simpson	Argentina	1 2 3 4 5
27	Sales Manager	Howard Snyder	France	1 2 3 4 5
28	Sales Consultant	Antonio Moreno	France	1 2 3 4 5
29	Owner	Howard Snyder	Italy	1 2 3 4 5
30	Sales Agent	Elizabeth Lincoln	France	1 2 3 4 5
31	Sales Manager	Jaime Yorres	Germany	1 2 3 4 5
32	Sales Representative	Patricio Simpson	Germany	1 2 3 4 5
33	Sales Associate	Jaime Yorres	USA	1 2 3 4 5
34	Marketing Assistant	Howard Snyder	Germany	1 2 3 4 5
35	Sales Manager	Howard Snyder	England	1 2 3 4 5
36	Sales Consultant	Pascale Cartrain	Italy	1 2 3 4 5
37	Sales Manager	Elizabeth Lincoln	USA	1 2 3 4 5
38	Sales Agent	Elizabeth Lincoln	England	1 2 3 4 5
39	Owner	Hanna Moos	Italy	1 2 3 4 5
40	Sales Associate	Hanna Moos	Italy	1 2 3 4 5
41	Owner	Howard Snyder	Bulgaria	1 2 3 4 5
42	Sales Manager	Georg Pipps	England	1 2 3 4 5
43	Sales Agent	Elizabeth Lincoln	France	1 2 3 4 5
44	Sales Consultant	Patricio Simpson	Argentina	1 2 3 4 5
45	Sales Associate	Hanna Moos	Argentina	1 2 3 4 5
46	Sales Representative	Patricio Simpson	Italy	1 2 3 4 5
47	Marketing Assistant	Patricio Simpson	Bulgaria	1 2 3 4 5
48	Marketing Assistant	Georg Pipps	Argentina	1 2 3 4 5
49	Sales Associate	Patricio Simpson	Bulgaria	1 2 3 4 5
50	Sales Consultant	Elizabeth Lincoln	Germany	1 2 3 4 5
51	Accountant	Hanna Moos	Bulgaria	1 2 3 4 5
52	Owner	Pascale Cartrain	Brazil	1 2 3 4 5
53	Marketing Assistant	Pascale Cartrain	England	1 2 3 4 5
54	Accountant	Patricio Simpson	France	1 2 3 4 5
55	Marketing Assistant	Paul Henriot	England	1 2 3 4 5
56	Sales Agent	Jaime Yorres	England	1 2 3 4 5
57	Sales Manager	Patricio Simpson	Austria	1 2 3 4 5
58	Sales Representative	Antonio Moreno	Germany	1 2 3 4 5
59	Marketing Assistant	Howard Snyder	Argentina	1 2 3 4 5
60	Sales Associate	Howard Snyder	France	1 2 3 4 5
61	Marketing Assistant	Antonio Moreno	Germany	1 2 3 4 5
62	Owner	Patricio Simpson	France	1 2 3 4 5
63	Sales Consultant	Elizabeth Lincoln	Spain	1 2 3 4 5
64	Accounting Manager	Howard Snyder	Spain	1 2 3 4 5
65	Sales Consultant	Patricio Simpson	England	1 2 3 4 5
66	Marketing Manager	Elizabeth Lincoln	Italy	1 2 3 4 5
67	Sales Manager	Howard Snyder	Austria	1 2 3 4 5
68	Sales Manager	Paul Henriot	England	1 2 3 4 5
69	Sales Agent	Matti Karttunen	England	1 2 3 4 5
70	Accounting Manager	Howard Snyder	Brazil	1 2 3 4 5
71	Accounting Manager	Pascale Cartrain	Bulgaria	1 2 3 4 5
72	Sales Manager	Howard Snyder	Argentina	1 2 3 4 5
73	Sales Consultant	Antonio Moreno	Bulgaria	1 2 3 4 5
74	Sales Consultant	Patricio Simpson	Italy	1 2 3 4 5
75	Sales Agent	Howard Snyder	Italy	1 2 3 4 5
76	Sales Manager	Howard Snyder	Spain	1 2 3 4 5
77	Sales Manager	Pascale Cartrain	England	1 2 3 4 5
78	Sales Representative	Matti Karttunen	Brazil	1 2 3 4 5
79	Accounting Manager	Howard Snyder	Brazil	1 2 3 4 5
80	Sales Agent	Patricio Simpson	Italy	1 2 3 4 5
81	Sales Associate	Georg Pipps	England	1 2 3 4 5
82	Sales Representative	Howard Snyder	Austria	1 2 3 4 5
83	Owner	Paul Henriot	France	1 2 3 4 5
84	Sales Associate	Hanna Moos	Brazil	1 2 3 4 5
85	Accountant	Pascale Cartrain	England	1 2 3 4 5
86	Marketing Assistant	Pascale Cartrain	Spain	1 2 3 4 5
87	Sales Manager	Antonio Moreno	England	1 2 3 4 5
88	Owner	Howard Snyder	Spain	1 2 3 4 5
89	Marketing Assistant	Howard Snyder	Bulgaria	1 2 3 4 5
90	Accounting Manager	Elizabeth Lincoln	Argentina	1 2 3 4 5
91	Marketing Assistant	Matti Karttunen	England	1 2 3 4 5
92	Sales Representative	Paul Henriot	Austria	1 2 3 4 5
93	Accountant	Antonio Moreno	Brazil	1 2 3 4 5
94	Owner	Matti Karttunen	Italy	1 2 3 4 5
95	Sales Consultant	Howard Snyder	Italy	1 2 3 4 5
96	Accounting Manager	Georg Pipps	Argentina	1 2 3 4 5
97	Marketing Manager	Hanna Moos	Spain	1 2 3 4 5
98	Owner	Patricio Simpson	Spain	1 2 3 4 5
99	Sales Manager	Patricio Simpson	Bulgaria	1 2 3 4 5
100	Sales Manager	Jaime Yorres	Germany	1 2 3 4 5


...121 122 123 124 125 126 127 128 129 130 ... Item 123001 to 124000 of 300000 Page: of 300 GoPage size:

Sort Ascending
Sort Descending
Clear Sorting
Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="c#" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.GridExamplesCSharp.Performance.Virtualization.DefaultCS" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

Support & Learning Resources

Find Assistance

Submit a support ticket if you have an active license or trial
Post in the forum if you don't have access to support

Virtualization

Related Resources

Support & Learning Resources

Find Assistance