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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 15001 to 16000 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