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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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