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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 18001 to 19000 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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