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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 17001 to 18000 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