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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...291 292 293 294 295 296 297 298 299 300 Item 297001 to 298000 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