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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...221 222 223 224 225 226 227 228 229 230 ... Item 229001 to 230000 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