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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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