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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 31001 to 32000 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="vb" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.GridExamplesVBNET.Performance.Virtualization.DefaultVB" %>

<%@ 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