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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...251 252 253 254 255 256 257 258 259 260 ... Item 255001 to 256000 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