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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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