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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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