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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...271 272 273 274 275 276 277 278 279 280 ... Item 277001 to 278000 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