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


...51 52 53 54 55 56 57 58 59 60 ... Item 59001 to 60000 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