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WebManagementEvent Class

Defines the base class for events that carry application and process information.

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

Public Class WebManagementEvent
	Inherits WebBaseEvent
Dim instance As WebManagementEvent

public class WebManagementEvent extends WebBaseEvent
public class WebManagementEvent extends WebBaseEvent
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.

The WebManagementEvent is the base class for all the ASP.NET health-monitoring event types. It uses the WebProcessInformation class to obtain process information that is available to its derived classes.


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 deriving from the WebManagementEvent class, see the example provided in this topic.

Notes to Inheritors: When formatting your custom event information for display, override the FormatCustomEventDetails method rather than the ToString method. This will avoid overwriting or tampering with sensitive system information. The event code you specify for your custom event must be greater than WebExtendedBase.

The following example shows how to implement a custom event by deriving it from the WebManagementEvent class.

Imports System
Imports System.Text
Imports System.Web
Imports System.Web.Management

' Implements a custom 
' WebManagementEvent class. 

Public Class SampleWebManagementEvent
   Inherits WebManagementEvent
   Private eventInfo As StringBuilder
   ' Invoked in case of 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: ", EventTime.ToString()))
    End Sub 'New
   ' Invoked in case of 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: ", EventTime.ToString()))
    End Sub 'New
   ' Raises the SampleWebRequestEvent.
   Public Overrides Sub Raise()
      ' Perform custom processing. 
        eventInfo.Append(String.Format( _
        "Event raised at: ", EventTime.ToString()))
      ' Raise the event.
   End Sub 'Raise
   ' Obtains the current process information.
   Public Function GetProcessInfo() As String
      Dim tempPi As New StringBuilder()
      Dim pi As WebProcessInformation = ProcessInformation
        tempPi.Append( _
        (pi.ProcessName + Environment.NewLine))
        tempPi.Append( _
        (pi.ProcessID.ToString() + Environment.NewLine))
        tempPi.Append( _
        (pi.AccountName + Environment.NewLine))
      Return tempPi.ToString()
   End Function 'GetProcessInfo
    Public Overrides Sub FormatCustomEventDetails( _
    ByVal formatter As WebEventFormatter)

        ' Add custom data.

        formatter.IndentationLevel += 1
        formatter.AppendLine( _
        "** SampleWebManagementEvent Start **")

        ' Add custom data.

        formatter.AppendLine( _
        "** SampleWebManagementEvent End **")
    End Sub 'FormatCustomEventDetails
End Class 'SampleWebManagementEvent 

The following is an excerpt of the configuration file that enables ASP.NET to use the custom event.

<healthMonitoring enabled="true" 

    <add  name="SampleWebManagementEvent" type="SamplesAspNet.SampleWebManagementEvent,webmanagementevent,Version=1.0.1573.24438, Culture=neutral, PublicKeyToken=2f5f337ae5c9bdaa, processorArchitecture=MSIL"/>

      name="Custom WebManagementEvent"

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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