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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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