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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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