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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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