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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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