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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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