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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...251 252 253 254 255 256 257 258 259 260 ... Item 254001 to 255000 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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