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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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