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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 31001 to 32000 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