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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page 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