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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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