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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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