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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 77001 to 78000 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