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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 28001 to 29000 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