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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...231 232 233 234 235 236 237 238 239 240 ... Item 234001 to 235000 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