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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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