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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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