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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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