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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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