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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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