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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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