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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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