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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 10001 to 11000 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