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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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