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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page size:

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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>

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