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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...111 112 113 114 115 116 117 118 119 120 ... Item 117001 to 118000 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