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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 23001 to 24000 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