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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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