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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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