HttpContext Class
Encapsulates all HTTP-specific information about an individual HTTP request.
Assembly: System.Web (in System.Web.dll)
Classes that inherit the IHttpModule and IHttpHandler interfaces are provided a reference to an HttpContext object for the current HTTP request. The object provides access to the intrinsic Request, Response, and Server properties for the request.
The following example demonstrates how to access and display properties of the HttpContext object. The context of the current HTTP request is accessed by using the Context property of the Page object.
<%@ Page Language="VB" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) ' The HttpContext associated with the page can be accessed by the Context property. Dim sb As New System.Text.StringBuilder() ' Use the current HttpContext object to determine if custom errors are enabled. sb.Append("Is custom errors enabled: " & _ Context.IsCustomErrorEnabled.ToString() & "<br/>") ' Use the current HttpContext object to determine if debugging is enabled. sb.Append("Is debugging enabled: " & _ Context.IsDebuggingEnabled.ToString() & "<br/>") ' Use the current HttpContext object to access the current TraceContext object. sb.Append("Trace Enabled: " & _ Context.Trace.IsEnabled.ToString() & "<br/>") ' Use the current HttpContext object to access the current HttpApplicationState object. sb.Append("Number of items in Application state: " & _ Context.Application.Count.ToString() & "<br/>") ' Use the current HttpContext object to access the current HttpSessionState object. ' Session state may not be configured. Try sb.Append("Number of items in Session state: " & _ Context.Session.Count.ToString() & "<br/>") Catch ex As Exception sb.Append("Session state not enabled. <br/>") End Try ' Use the current HttpContext object to access the current Cache object. sb.Append("Number of items in the cache: " & _ Context.Cache.Count.ToString() & "<br/>") ' Use the current HttpContext object to determine the timestamp for the current HTTP Request. sb.Append("Timestamp for the HTTP request: " & _ Context.Timestamp.ToString() & "<br/>") ' Assign StringBuilder object to output label. OutputLabel.Text = sb.ToString() End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>HttpContext Example</title> </head> <body> <form id="form1" runat="server"> <div> Using the current HttpContext to get information about the current page. <br /> <asp:Label id="OutputLabel" runat="server"></asp:Label> </div> </form> </body> </html>
- AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand. Permission value: Minimal
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.