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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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