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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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