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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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