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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...41 42 43 44 45 46 47 48 49 50 ... Item 43001 to 44000 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