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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 97001 to 98000 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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