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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...111 112 113 114 115 116 117 118 119 120 ... Item 115001 to 116000 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