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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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