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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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