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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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