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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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