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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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