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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...51 52 53 54 55 56 57 58 59 60 ... Item 59001 to 60000 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