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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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