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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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