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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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