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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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