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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 14001 to 15000 of 300000 Page: of 300 GoPage 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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