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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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