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


...231 232 233 234 235 236 237 238 239 240 ... Item 239001 to 240000 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