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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 4001 to 5000 of 300000 Page: of 300 GoPage 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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