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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...41 42 43 44 45 46 47 48 49 50 ... Item 47001 to 48000 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