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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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