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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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