SqlMembershipProvider.GetNumberOfUsersOnline Method
Returns the number of users currently accessing the application.
Assembly: System.Web (in System.Web.dll)
This method is called by the Membership class to retrieve the number of users considered online from the SQL Server database specified in the ASP.NET application's configuration file (Web.config).
GetNumberOfUsersOnline returns the number of users of the current application whose last activity date and time is greater than the current date and time less the value of the UserIsOnlineTimeWindow property in minutes.
Only users associated with the configured ApplicationName are included in the count.
The following code example returns a list of users with a count of the users currently online.
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This example uses the Membership class to call the SqlMembershipProvider specified as the defaultProvider in the Web.config file. If you need to access the default provider as the type SqlMembershipProvider, you can cast the Provider property of the Membership class. To access other configured providers as a specific provider type, you can access them by their configured name with the Providers property of the Membership class and cast them as the specific provider type. |
<%@ Page Language="C#" %> <%@ Import Namespace="System.Web.Security" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> int pageSize = 5; int totalUsers; int totalPages; int currentPage = 1; public void Page_Load() { if (!IsPostBack) { GetUsers(); } } private void GetUsers() { UsersOnlineLabel.Text = Membership.GetNumberOfUsersOnline().ToString(); UserGrid.DataSource = Membership.GetAllUsers(currentPage-1, pageSize, out totalUsers); totalPages = ((totalUsers - 1) / pageSize) + 1; // Ensure that we do not navigate past the last page of users. if (currentPage > totalPages) { currentPage = totalPages; GetUsers(); return; } UserGrid.DataBind(); CurrentPageLabel.Text = currentPage.ToString(); TotalPagesLabel.Text = totalPages.ToString(); if (currentPage == totalPages) NextButton.Visible = false; else NextButton.Visible = true; if (currentPage == 1) PreviousButton.Visible = false; else PreviousButton.Visible = true; if (totalUsers <= 0) NavigationPanel.Visible = false; else NavigationPanel.Visible = true; } public void NextButton_OnClick(object sender, EventArgs args) { currentPage = Convert.ToInt32(CurrentPageLabel.Text); currentPage++; GetUsers(); } public void PreviousButton_OnClick(object sender, EventArgs args) { currentPage = Convert.ToInt32(CurrentPageLabel.Text); currentPage--; GetUsers(); } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>Sample: Find Users</title> </head> <body> <form id="form1" runat="server"> <h3>User List</h3> Number of Users Online: <asp:Label id="UsersOnlineLabel" runat="Server" /><br /> <asp:Panel id="NavigationPanel" Visible="false" runat="server"> <table border="0" cellpadding="3" cellspacing="3"> <tr> <td style="width:100">Page <asp:Label id="CurrentPageLabel" runat="server" /> of <asp:Label id="TotalPagesLabel" runat="server" /></td> <td style="width:60"><asp:LinkButton id="PreviousButton" Text="< Prev" OnClick="PreviousButton_OnClick" runat="server" /></td> <td style="width:60"><asp:LinkButton id="NextButton" Text="Next >" OnClick="NextButton_OnClick" runat="server" /></td> </tr> </table> </asp:Panel> <asp:DataGrid id="UserGrid" runat="server" CellPadding="2" CellSpacing="1" Gridlines="Both"> <HeaderStyle BackColor="darkblue" ForeColor="white" /> </asp:DataGrid> </form> </body> </html>
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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