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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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