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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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