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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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