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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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