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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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