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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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