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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...61 62 63 64 65 66 67 68 69 70 ... Item 64001 to 65000 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