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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...231 232 233 234 235 236 237 238 239 240 ... Item 233001 to 234000 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