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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...41 42 43 44 45 46 47 48 49 50 ... Item 43001 to 44000 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