WebThreadInformation Class

WebThreadInformation Class

 

Provides information about the state of a thread in an ASP.NET process.

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

System.Object
  System.Web.Management.WebThreadInformation

Public NotInheritable Class WebThreadInformation

NameDescription
System_CAPS_pubpropertyIsImpersonating

Gets the current thread-impersonation mode.

System_CAPS_pubpropertyStackTrace

Gets the current thread-managed stack trace.

System_CAPS_pubpropertyThreadAccountName

Gets the thread account name.

System_CAPS_pubpropertyThreadID

Gets the current thread identifier.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodFormatToString(WebEventFormatter)

Formats thread-related information.

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

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 WebThreadInformation class contain information that is obtained using either the WebErrorEvent type or the WebRequestErrorEvent type.

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

System_CAPS_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 has two parts. The first is an excerpt of a configuration file that enables ASP.NET to use a custom event that uses the WebThreadInformation type. The second shows how to implement the custom event that uses the WebThreadInformation type.

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="SampleWebThreadInformation" 
type="SamplesAspNet.SampleWebThreadInformation,webthreadinformation, Version=1.0.1782.29648, Culture=neutral, PublicKeyToken=b3283a2de7dd3f27, processorArchitecture=MSIL" />

  </eventMappings>

  <rules>

    <add name="Custom Web Thread Info Event" 
      eventName="SampleWebThreadInformation" 
      provider="EventLogProvider"
      profile="Custom" />

  </rules>

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



' Implements a custom WebErrorstEvent that uses the 
' WebThreadInformation. 

Public Class SampleWebThreadInformation
   Inherits WebErrorEvent
   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, ByVal e As Exception)
        MyBase.New(msg, eventSource, eventCode, e)
        ' Perform custom initialization.
        eventInfo = New StringBuilder()
        eventInfo.Append(String.Format("Event created at: {0}", EventTime.ToString()))
    End Sub 'NewNew



   ' 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 impersonation mode.
   Public Function GetThreadImpersonation() As String
        Return String.Format( _
        "Is impersonating: {0}", _
        ThreadInformation.IsImpersonating.ToString())
   End Function 'GetThreadImpersonation

   ' Get the stack trace.
   Public Function GetThreadStackTrace() As String
        Return String.Format( _
        "Stack trace: {0}", _
        ThreadInformation.StackTrace)
   End Function 'GetThreadStackTrace

   ' Get the account name.
   Public Function GetThreadAccountName() As String
        Return String.Format( _
        "Request user host address: {0}", _
        ThreadInformation.ThreadAccountName)
   End Function 'GetThreadAccountName

   ' Get the task Id.
   Public Function GetThreadId() As String
      ' Get the request principal.
        Return String.Format( _
        "Thread Id: {0}", _
        ThreadInformation.ThreadID.ToString())
   End Function 'GetThreadId

   ' Formats Web request event information.
    Public Overrides Sub FormatCustomEventDetails( _
    ByVal formatter As WebEventFormatter)

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

        formatter.IndentationLevel += 1

        ' Display the thread information obtained 
        formatter.AppendLine(GetThreadImpersonation())
        formatter.AppendLine(GetThreadStackTrace())
        formatter.AppendLine(GetThreadAccountName())
        formatter.AppendLine(GetThreadId())
        formatter.IndentationLevel -= 1

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

End Class 'SampleWebThreadInformation



.NET Framework
Available since 2.0

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

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