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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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