New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...291 292 293 294 295 296 297 298 299 300 Item 294001 to 295000 of 300000 Page: of 300 GoPage size:

Sort Ascending
Sort Descending
Clear Sorting
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>

Support & Learning Resources

Find Assistance

Submit a support ticket if you have an active license or trial
Post in the forum if you don't have access to support

Virtualization

Related Resources

Support & Learning Resources

Find Assistance