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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...291 292 293 294 295 296 297 298 299 300 Item 298001 to 299000 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