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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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