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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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