Web Event Class Hierarchy
When a Web event is raised, an instance of the associated event class is created. Event data is collected in the properties of this object. Event providers process this data. For more information, see "How ASP.NET Health Monitoring Works" in ASP.NET Health Monitoring Overview.
Web events can contain information about the worker process, application domain, request data, response data, application errors, configuration errors, and audit events. Health information contained in a parent event class is inherited by any child event classes.
The relationships between the Web event classes are shown in the following illustration. They are members of the System.Web.Management namespace.
The further down in the hierarchy of Web event classes, the more specific the data is to the ASP.NET application. For example, derived classes expose information such as stack traces, client IPs, and thread and process information.
For a code example of a custom Web event, see Implementing Custom ASP.NET Health Monitoring Events and Providers.
Web Event Information
To use Web events, you must understand the information they convey. The rows in the following table refer to the Web event classes. The columns refer to the information classes, which are usually included as properties in the Web event classes. Using the table, you can decide what Web event class you need to use or inherit from to obtain the desired information.
If your application is not running with Full trust, only the WebBaseEvent class is inheritable. This helps protect against exposing sensitive information through the information classes listed in this table.
Web event classes | WebApplicationInformation | WebProcessInformation | WebProcessStatistics | WebRequestInformation | WebThreadInformation |
|---|
WebBaseEvent | Data generated by this class. | Not available | Not available | Not available | Not available |
WebManagementEvent | Data generated by the parent class | Data generated by this class. | Not available | Not available | Not available |
WebHeartBeatEvent | Data generated by the parent class. | Data generated by the parent class | Data generated by this class. | Not available | Not available |
WebRequestEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by this class. | Not available |
WebApplicationLifetimeEvent | Data generated by the parent class | Data generated by the parent class | Not available | Not available | Not available |
WebBaseErrorEvent | Data generated by the parent class | Data generated by the parent class | Not available | Not available | Not available |
WebErrorEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by this class. | Data generated by this class. |
WebRequestErrorEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Data generated by the parent class |
WebAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by this class. | Not available |
WebSuccessAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Not available |
WebAuthenticationSuccessAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Not available |
WebFailureAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Not available |
WebAuthenticationFailureAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Not available |
WebViewStateFailureAuditEvent | Data generated by the parent class | Data generated by the parent class | Not available | Data generated by the parent class | Not available |