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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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