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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...251 252 253 254 255 256 257 258 259 260 ... Item 253001 to 254000 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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