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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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