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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 4001 to 5000 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