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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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