WebBaseEvent Class
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.
Defines the base class for the ASP.NET health-monitoring events.
public ref class WebBaseEvent
public class WebBaseEvent
type WebBaseEvent = class
Public Class WebBaseEvent
- Inheritance
-
WebBaseEvent
- Derived
The following example shows how to derive from the WebBaseEvent class to create a custom health-monitoring event.
using System;
using System.Text;
using System.Web;
using System.Web.Management;
namespace SamplesAspNet
{
// Implements a custom WebBaseEvent class.
public class SampleWebBaseEvent :
System.Web.Management.WebBaseEvent, IWebEventCustomEvaluator
{
private string customCreatedMsg, customRaisedMsg;
// Store firing record info.
private static string firingRecordInfo;
// Implements the IWebEventCustomEvaluator.CanFire
// method. It is called by the ASP.NET if this custom
// type is configured in the profile
// element of the healthMonitoring section.
public bool CanFire(
System.Web.Management.WebBaseEvent e,
RuleFiringRecord rule)
{
bool fireEvent;
string lastFired = rule.LastFired.ToString();
string timesRaised = rule.TimesRaised.ToString();
// Fire every other event raised.
fireEvent =
(rule.TimesRaised % 2 == 0) ? true : false;
if (fireEvent)
{
firingRecordInfo =
string.Format("Event last fired: {0}",
lastFired) +
string.Format(". Times raised: {0}",
timesRaised);
}
else
firingRecordInfo =
string.Format(
"Event not fired. Times raised: {0}",
timesRaised);
return fireEvent;
}
// Invoked in case of events identified only by
// their event code.
public SampleWebBaseEvent(string msg,
object eventSource, int eventCode):
base(msg, eventSource, eventCode)
{
// Perform custom initialization.
customCreatedMsg =
string.Format("Event created at: {0}",
EventTime.ToString());
}
// Invoked in case of events identified by their
// event code.and related event detailed code.
public SampleWebBaseEvent(string msg, object eventSource,
int eventCode, int eventDetailCode):
base(msg, eventSource, eventCode, eventDetailCode)
{
// Perform custom initialization.
customCreatedMsg =
string.Format("Event created at: {0}",
EventTime.ToString());
}
// Raises the SampleWebBaseEvent.
public override void Raise()
{
// Perform custom processing.
customRaisedMsg =
string.Format("Event raised at: {0}",
EventTime.ToString());
// Raise the event.
base.Raise();
}
// Raises the SampleWebBaseEvent.
public void CustomRaise(
System.Web.Management.WebBaseEvent evnt)
{
// Raise the event.
Raise(evnt);
}
// Gets the event code.
public int GetEventCode(bool detail)
{
int eCode;
if (!detail)
// Get the event code.
eCode = EventCode;
else
// Get the detail event code.
eCode = EventDetailCode;
return eCode;
}
// Gets the event sequence.
public long GetEventSequence()
{
// Get the event sequence.
long eventSequence = EventSequence;
return eventSequence;
}
// Gets the event source.
public Object GetEventSource()
{
// Get the event source.
Object source = this.EventSource;
return source;
}
// Gets the event time.
public DateTime GetEventTime()
{
// Get the event source.
DateTime eTime = EventTime;
return eTime;
}
// Gets the event time.
public DateTime GetEventTimeUtc()
{
// Get the event source.
DateTime eTime = EventTimeUtc;
return eTime;
}
// Gets the event sequence.
public string GetEventMessage()
{
// Get the event message.
string eventMsg = Message;
return eventMsg;
}
// Gets the current application information.
public WebApplicationInformation GetEventAppInfo()
{
// Get the event message.
WebApplicationInformation appImfo =
ApplicationInformation;
return appImfo;
}
// Implements the ToString() method.
public override string ToString()
{
return base.ToString();
}
// Implements the ToString(bool, bool) method.
public string customToString(bool includeAppInfo,
bool includeCustomInfo)
{
return (
base.ToString(includeAppInfo,
includeCustomInfo));
}
// Gets the event identifier.
public Guid GetEventId()
{
Guid evId = EventID;
return evId;
}
//Formats Web request event information.
public override void FormatCustomEventDetails(
WebEventFormatter formatter)
{
base.FormatCustomEventDetails(formatter);
// Add custom data.
formatter.AppendLine("");
formatter.IndentationLevel += 1;
formatter.TabSize = 4;
formatter.AppendLine(
"*SampleWebBaseEvent Start *");
// Display custom event information.
formatter.AppendLine(customCreatedMsg);
formatter.AppendLine(customRaisedMsg);
formatter.AppendLine(firingRecordInfo);
formatter.AppendLine(
"* SampleWebBaseEvent End *");
formatter.IndentationLevel -= 1;
}
}
}
Imports System.Text
Imports System.Web
Imports System.Web.Management
Public Class SampleWebBaseEvent
Inherits System.Web.Management.WebBaseEvent
Implements System.Web.Management.IWebEventCustomEvaluator
Private customCreatedMsg, customRaisedMsg As String
' Store firing record info.
Private Shared firingRecordInfo As String
' Implements the IWebEventCustomEvaluator.CanFire
' method. It is called by the ASP.NET if this custom
' type is configured in the profile
' element of the healthMonitoring section.
Public Function CanFire( _
ByVal e As System.Web.Management.WebBaseEvent, _
ByVal rule As RuleFiringRecord) As Boolean _
Implements System.Web.Management.IWebEventCustomEvaluator.CanFire
Dim fireEvent As Boolean
Dim lastFired As String = _
rule.LastFired.ToString()
Dim timesRaised As String = _
rule.TimesRaised.ToString()
' Fire every other event raised.
fireEvent = _
IIf(rule.TimesRaised Mod 2 = 0, True, False)
If fireEvent Then
firingRecordInfo = String.Format( _
"Event last fired: {0}", lastFired) + _
String.Format( _
". Times raised: {0}", timesRaised)
Else
firingRecordInfo = String.Format( _
"Event not fired. Times raised: {0}", _
timesRaised)
End If
Return fireEvent
End Function 'CanFire
' 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.
customCreatedMsg = String.Format( _
"Event created at: {0}", DateTime.Now.TimeOfDay.ToString())
End Sub
' 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.
customCreatedMsg = String.Format( _
"Event created at: {0}", DateTime.Now.TimeOfDay.ToString())
End Sub
' Raises the SampleWebBaseEvent.
Public Overrides Sub Raise()
' Perform custom processing.
customRaisedMsg = String.Format( _
"Event raised at: {0}", DateTime.Now.TimeOfDay.ToString())
' Raise the event.
MyBase.Raise()
End Sub
' Raises the SampleWebBaseEvent.
Public Sub CustomRaise(ByVal evnt _
As System.Web.Management.WebBaseEvent)
' Raise the event.
Raise(evnt)
End Sub
' Gets the event code.
Public Function GetEventCode(ByVal detail _
As Boolean) As Integer
Dim eCode As Integer
If Not detail Then
' Get the event code.
eCode = EventCode
' Get the detail event code.
Else
eCode = EventDetailCode
End If
Return eCode
End Function 'GetEventCode
' Gets the event sequence.
Public Function GetEventSequence() As Long
' Get the event sequence.
Dim eventSequence As Long = eventSequence
Return eventSequence
End Function 'GetEventSequence
' Gets the event source.
Public Function GetEventSource() As [Object]
' Get the event source.
Dim [source] As [Object] = Me.EventSource
Return [source]
End Function 'GetEventSource
' Gets the event time.
Public Function GetEventTime() As DateTime
' Get the event source.
Dim eTime As DateTime = EventTime
Return eTime
End Function 'GetEventTime
' Gets the event time.
Public Function GetEventTimeUtc() As DateTime
' Get the event source.
Dim eTime As DateTime = EventTimeUtc
Return eTime
End Function 'GetEventTimeUtc
' Gets the event sequence.
Public Function GetEventMessage() As String
' Get the event message.
Dim eventMsg As String = Message
Return eventMsg
End Function 'GetEventMessage
' Gets the current application information.
Public Function GetEventAppInfo() As WebApplicationInformation
' Get the event message.
Dim appImfo As WebApplicationInformation = _
ApplicationInformation
Return appImfo
End Function 'GetEventAppInfo
' Implements the ToString() method.
Public Overrides Function ToString() As String
Return MyBase.ToString()
End Function 'ToString
' Implements the ToString(bool, bool) method.
Public Function customToString(ByVal includeAppInfo As Boolean, _
ByVal includeCustomInfo As Boolean) As String
Return MyBase.ToString(includeAppInfo, includeCustomInfo)
End Function 'customToString
' Gets the event identifier.
Public Function GetEventId() As Guid
Dim evId As Guid = EventID
Return evId
End Function 'GetEventId
'Formats Web request event information.
Public Overrides Sub FormatCustomEventDetails( _
ByVal formatter As WebEventFormatter)
MyBase.FormatCustomEventDetails(formatter)
' Add custom data.
formatter.AppendLine("")
formatter.IndentationLevel += 1
formatter.TabSize = 4
formatter.AppendLine("*SampleWebBaseEvent Start *")
formatter.AppendLine("Custom information goes here")
formatter.AppendLine("* SampleWebBaseEvent End *")
' Display custom event timing.
formatter.AppendLine(customCreatedMsg)
formatter.AppendLine(customRaisedMsg)
formatter.IndentationLevel -= 1
End Sub
End Class
The following example is an excerpt of the configuration file that enables ASP.NET to use the custom event.
<healthMonitoring enabled="true" heartBeatInterval="0">
<eventMappings>
<add name="SampleWebBaseEvent"
type="SamplesAspNet.SampleWebBaseEvent,
webbaseevent, Version=1.0.1573.24438, Culture=neutral,
PublicKeyToken=2f5f337ae5c9bdaa,
processorArchitecture=MSIL" />
</eventMappings>
<rules>
<add
name="CustomWebBaseEvent"
eventName="SampleWebBaseEvent"
provider="EventLogProvider"
profile="Critical"/>
</rules>
</healthMonitoring>
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 WebBaseEvent class is the root of the inheritance tree for all the ASP.NET health-monitoring event types. It uses the WebApplicationInformation class to obtain application information that is available to its derived class.
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 deriving from the WebBaseEvent class, see the example provided in this topic.
When you format your custom event information for display, override the FormatCustomEventDetails(WebEventFormatter) 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.
Web |
Initializes a new instance of the WebBaseEvent class using the supplied parameters. |
Web |
Initializes a new instance of the WebBaseEvent class using the supplied parameters. |
Application |
Gets a WebApplicationInformation object that contains information about the current application being monitored. |
Event |
Gets the code value associated with the event. |
Event |
Gets the event detail code. |
EventID |
Gets the identifier associated with the event. |
Event |
Gets a counter that represents the number of times the event has occurred. |
Event |
Gets the number of times the event has been raised by the application. |
Event |
Gets the object that raises the event. |
Event |
Gets the time when the event was raised. |
Event |
Gets the time when the event was raised. |
Message |
Gets the message that describes the event. |
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
Format |
Provides standard formatting of the event information. |
Get |
Serves as the default hash function. (Inherited from Object) |
Get |
Gets the Type of the current instance. (Inherited from Object) |
Increment |
Used internally to increment performance counters. |
Memberwise |
Creates a shallow copy of the current Object. (Inherited from Object) |
Raise() |
Raises an event by notifying any configured provider that the event has occurred. |
Raise(Web |
Raises the specified event by notifying any configured provider that the event has occurred. |
To |
Formats event information for display purposes. |
To |
Formats event information for display purposes. |
Product | Versions |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: