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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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