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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 4001 to 5000 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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