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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 98001 to 99000 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