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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...101 102 103 104 105 106 107 108 109 110 ... Item 107001 to 108000 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