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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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