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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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