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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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