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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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