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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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