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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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