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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...41 42 43 44 45 46 47 48 49 50 ... Item 46001 to 47000 of 300000 Page: of 300 GoPage 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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