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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 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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