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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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