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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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