WebThreadInformation Class
Provides information about the state of a thread in an ASP.NET process.
Assembly: System.Web (in System.Web.dll)
'Declaration <AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ <AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ Public NotInheritable Class WebThreadInformation 'Usage Dim instance As WebThreadInformation
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.
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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 '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 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
- 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.
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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