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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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