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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...221 222 223 224 225 226 227 228 229 230 ... Item 223001 to 224000 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