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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 25001 to 26000 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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