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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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