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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...81 82 83 84 85 86 87 88 89 90 ... Item 87001 to 88000 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