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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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