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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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