WebThreadInformation Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides information about the state of a thread in an ASP.NET process.
public ref class WebThreadInformation sealed
public sealed class WebThreadInformation
type WebThreadInformation = class
Public NotInheritable Class WebThreadInformation
- Inheritance
-
WebThreadInformation
Examples
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>
using System;
using System.Text;
using System.Web;
using System.Web.Management;
namespace SamplesAspNet
{
// Implements a custom WebErrorstEvent that uses the
// WebThreadInformation.
public class SampleWebThreadInformation :
WebErrorEvent
{
private StringBuilder eventInfo;
// Instantiate events identified
// only by their event code.
public SampleWebThreadInformation(
string msg, object eventSource,
int eventCode, Exception e)
:
base(msg, eventSource, eventCode, e)
{
// Perform custom initialization.
eventInfo = new StringBuilder();
eventInfo.Append(string.Format(
"Event created at: {0}",
EventTime.ToString()));
}
// Raises the event.
public override void Raise()
{
// Perform custom processing.
eventInfo.Append(string.Format(
"Event raised at: {0}",
EventTime.ToString()));
// Raise the event.
base.Raise();
}
// Get the impersonation mode.
public string GetThreadImpersonation()
{
return (string.Format(
"Is impersonating: {0}",
ThreadInformation.IsImpersonating.ToString()));
}
// Get the stack trace.
public string GetThreadStackTrace()
{
return (string.Format(
"Stack trace: {0}",
ThreadInformation.StackTrace));
}
// Get the account name.
public string GetThreadAccountName()
{
return (string.Format(
"Request user host address: {0}",
ThreadInformation.ThreadAccountName));
}
// Get the task Id.
public string GetThreadId()
{
// Get the request principal.
return (string.Format(
"Thread Id: {0}",
ThreadInformation.ThreadID.ToString()));
}
// Formats Web request event information.
public override void FormatCustomEventDetails(
WebEventFormatter formatter)
{
// 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());
}
}
}
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
' 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
' 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
End Class
Remarks
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.
Note
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.
Properties
IsImpersonating |
Gets the current thread-impersonation mode. |
StackTrace |
Gets the current thread-managed stack trace. |
ThreadAccountName |
Gets the thread account name. |
ThreadID |
Gets the current thread identifier. |
Methods
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
FormatToString(WebEventFormatter) |
Formats thread-related information. |
GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
GetType() |
Gets the Type of the current instance. (Inherited from Object) |
MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
ToString() |
Returns a string that represents the current object. (Inherited from Object) |