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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 8001 to 9000 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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