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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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