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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...201 202 203 204 205 206 207 208 209 210 ... Item 207001 to 208000 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