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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...241 242 243 244 245 246 247 248 249 250 ... Item 246001 to 247000 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