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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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