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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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