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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...101 102 103 104 105 106 107 108 109 110 ... Item 101001 to 102000 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