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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...261 262 263 264 265 266 267 268 269 270 ... Item 266001 to 267000 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