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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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