WebRequestInformation Class

Provides information about the current Web request.

Namespace: System.Web.Management
Assembly: System.Web (in system.web.dll)

'Declaration
Public NotInheritable Class WebRequestInformation
'Usage
Dim instance As WebRequestInformation

public final class WebRequestInformation
public final class WebRequestInformation
Not applicable.

ASP.NET health monitoring allows production and operations staff to manage deployed Web applications. The System.Web.Management namespace contains the health-event types responsible for packaging application health-status data and the provider types responsible for processing this data. It also contains supporting types that help during the management of health events.

Instances of the WebRequestInformation class contain information that is obtained using the WebRequestEvent, WebAuditEvent, WebErrorEvent, or WebRequestErrorEvent types.

Your application needs the appropriate permissions to access protected information provided by this type.

NoteNote:

In most cases you will be able to use the ASP.NET health-monitoring types as implemented, and you will control the health-monitoring system by specifying values in the healthMonitoring configuration section. You can also derive from the health-monitoring types to create your own custom events and providers. For an example of creating a custom event class, see the example provided in this topic.

The following code example shows how to implement a custom event that uses the WebRequestInformation type.

Also shown is an excerpt of the configuration file that enables ASP.NET to use this custom event.

Ensure that your custom event is raised at the proper time, that is, when the equivalent system health event it replaces would be raised.

<healthMonitoring
  heartBeatInterval="0" enabled="true">

  <profiles>
    <add name="Custom" 
      minInstances="1" 
      maxLimit="Infinite" 
      minInterval="00:00:00" />
  </profiles>

  <eventMappings>

    <add 
      name="SampleWebRequestInformation" 
      type="SamplesAspNet.SampleWebRequestInformation,webrequestinformation,Version=1.0.1782.28745, Culture=neutral, PublicKeyToken=79955d9b8521c250,processorArchitecture=MSIL" />

  </eventMappings>

  <rules>

    <add name="Custom Web Request Info Event" 
      eventName="SampleWebRequestInformation" 
      provider="EventLogProvider"
      profile="Custom" />

  </rules>

</healthMonitoring>
Imports System
Imports System.Text
Imports System.Web
Imports System.Web.Management
Imports System.Web.UI
Imports System.Web.UI.WebControls


' Implements a custom WebRequestEvent that uses
' WebRequestInformation. 

Public Class SampleWebRequestInformation
   Inherits WebRequestEvent
   Private eventInfo As StringBuilder
   
   
   ' Instantiate events identified 
   ' only by their event code.
    Public Sub New(ByVal msg As String, _
    ByVal eventSource As Object, _
    ByVal eventCode As Integer)
        MyBase.New(msg, eventSource, eventCode)
        ' Perform custom initialization.
        eventInfo = New StringBuilder()
        eventInfo.Append(String.Format( _
        "Event created at: {0}", EventTime.ToString()))
    End Sub 'New
   
   
   ' Instantiate events identified by 
   ' their event code.and related 
   ' event detailed code.
    Public Sub New(ByVal msg As String, _
    ByVal eventSource As Object, _
    ByVal eventCode As Integer, _
    ByVal eventDetailCode As Integer)
        MyBase.New(msg, eventSource, _
        eventCode, eventDetailCode)
        ' Perform custom initialization.
        eventInfo = New StringBuilder()
        eventInfo.Append(String.Format( _
        "Event created at: {0}", EventTime.ToString()))
    End Sub 'New
   
   
   ' Raises the event.
   Public Overrides Sub Raise()
      ' Perform custom processing. 
        eventInfo.Append(String.Format( _
        "Event raised at: {0}", EventTime.ToString()))
      ' Raise the event.
      MyBase.Raise()
   End Sub 'Raise
   
   ' Get the request path.
   Public Function GetRequestPath() As String
      ' Get the request path.
        Return String.Format( _
        "Request path: {0}", RequestInformation.RequestPath)
   End Function 'GetRequestPath
   
   ' Get the request URL.
   Public Function GetRequestUrl() As String
      ' Get the request URL.
        Return String.Format("Request URL: {0}", _
        RequestInformation.RequestUrl)
   End Function 'GetRequestUrl
   
   ' Get the request user host address.
   Public Function GetRequestUserHostAdddress() As String
      ' Get the request user host address.
        Return String.Format( _
        "Request user host address: {0}", _
        RequestInformation.UserHostAddress)
   End Function 'GetRequestUserHostAdddress
   
   ' Get the request principal.
   Public Function GetRequestPrincipal() As String
      ' Get the request principal.
        Return String.Format( _
        "Request principal name: {0}", _
        RequestInformation.Principal.Identity.Name)
   End Function 'GetRequestPrincipal
   
   ' Formats Web request event information.
    Public Overrides Sub FormatCustomEventDetails( _
    ByVal formatter As WebEventFormatter)

        ' Add custom data.
        formatter.AppendLine("")
        formatter.AppendLine("Custom Request Information:")

        formatter.IndentationLevel += 1

        ' Display the request information obtained 
        ' using the WebRequestInformation object.
        formatter.AppendLine(GetRequestPath())
        formatter.AppendLine(GetRequestUrl())
        formatter.AppendLine(GetRequestUserHostAdddress())
        formatter.AppendLine(GetRequestPrincipal())
        formatter.IndentationLevel -= 1

        formatter.AppendLine(eventInfo.ToString())
    End Sub 'FormatCustomEventDetails 

End Class 'SampleWebRequestInformation



  • InheritanceDemand  The derived class inheriting the class or overriding a method is required to have been granted the specified permission.
  • LinkDemand  The immediate caller is required to have been granted the specified permission. For more information on declarative security and link demands, see Declarative Security Used with Class and Member Scope.

System.Object
  System.Web.Management.WebRequestInformation

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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