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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 33001 to 34000 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