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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...231 232 233 234 235 236 237 238 239 240 ... Item 230001 to 231000 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