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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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