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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 GoPage 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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