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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...271 272 273 274 275 276 277 278 279 280 ... Item 272001 to 273000 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