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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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