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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 32001 to 33000 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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