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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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