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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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