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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 76001 to 77000 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