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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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