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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...241 242 243 244 245 246 247 248 249 250 ... Item 242001 to 243000 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