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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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