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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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