Represents a significant event in the lifetime of an application.
Assembly: System.Web (in System.Web.dll)
Thetype exposes the following members.
|WebApplicationLifetimeEvent(String, Object, Int32)||Initializes the class using the supplied parameters.|
|WebApplicationLifetimeEvent(String, Object, Int32, Int32)||Initializes the class using the supplied parameters.|
|EventCode||Gets the code value associated with the event. (Inherited from WebBaseEvent.)|
|EventDetailCode||Gets the event detail code. (Inherited from WebBaseEvent.)|
|EventID||Gets the identifier associated with the event. (Inherited from WebBaseEvent.)|
|EventOccurrence||Gets a counter that represents the number of times the event has occurred. (Inherited from WebBaseEvent.)|
|EventSequence||Gets the number of times the event has been raised by the application. (Inherited from WebBaseEvent.)|
|EventSource||Gets the object that raises the event. (Inherited from WebBaseEvent.)|
|EventTime||Gets the time when the event was raised. (Inherited from WebBaseEvent.)|
|EventTimeUtc||Gets the time when the event was raised. (Inherited from WebBaseEvent.)|
|Message||Gets the message that describes the event. (Inherited from WebBaseEvent.)|
|ProcessInformation||Gets information about the ASP.NET application-hosting process. (Inherited from WebManagementEvent.)|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|Finalize||Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)|
|FormatCustomEventDetails||Provides standard formatting of the event information. (Inherited from WebBaseEvent.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|IncrementPerfCounters||Infrastructure. Used internally to increment performance counters. (Overrides WebBaseEvent.IncrementPerfCounters().)|
|MemberwiseClone||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. (Inherited from WebBaseEvent.)|
|ToString()||Formats event information for display purposes. (Inherited from WebBaseEvent.)|
|ToString(Boolean, Boolean)||Formats event information for display purposes. (Inherited from WebBaseEvent.)|
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.
Application lifetime events include events such as application startup and shutdown events. If an application is terminated, you can determine why by viewing the related event message field.
When a instance occurs, ASP.NET health monitoring updates the Application Lifetime Events performance counter. You can log these events by adding the object to the rules subsection of the healthMonitoring section of the configuration file, as shown in the following example.
<rules> <add name="Application Events" eventName="Application Lifetime Events" provider="EventLogProvider" profile="Default" minInterval="00:01:00" /> </rules>
The Application Lifetime Events performance counter contains the sum total of all ASP.NET lifetime events. To view this performance counter in System Monitor (PerfMon), in the Add Counters window select ASP.NET from the Performance object drop-down list. Select the Application Lifetime Events performance counter, and click the Add button. For more information, see "Using the System Monitor (PerfMon) with ASP.NET Applications" on MSDN. If you allow events to be logged by the standard EventLogWebEventProvider, you can view them in Event Viewer by selecting the Application log. For more information, see Event Viewer in the Windows Server 2003 documentation on TechNet.
Because the object is a high-volume event, logging it is resource-intensive and might slow down your system. It can also cause other events to be overwritten in the case of the EventLogWebEventProvider class due to the high volume of events and the way the event logging works.
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 class, see the example provided in this topic.
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 following code example shows how to derive from the class to create a custom event.
The following configuration-file excerpt shows how to configure the healthMonitoring section of a configuration file to add the SampleWebApplicationLifetimeEvent code defined above to the ASP.NET health-monitoring system. To add the event to the system, you must define the event by adding a new entry to the eventMappings section and map the event to a provider by adding a new entry to the rules section.
<healthMonitoring enabled="true" heartBeatInterval="0"> <eventMappings> <clear /> <!-- Configure the application lifetime event --> <!-- object to handle the Web application events. --> <add name="SampleApplicationLifetimeEvents" type="System.Web.Management.SampleWebApplicationLifetimeEvent, System.Web,Version=2.0.3600.0, Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a" /> </eventMappings> <rules> <clear/> // Configure the connection between the // application lifetime event object // and the provider that must process it. <add name="Custom Application Events" eventName="SampleApplicationLifetimeEvents" provider="EventLogProvider" profile="Default" minInterval="00:01:00" /> </rules> </healthMonitoring>