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WebRequestEvent Class

Defines the base class for events providing Web-request information.

Namespace: System.Web.Management
Assembly: System.Web (in system.web.dll)

public class WebRequestEvent : WebManagementEvent
public class WebRequestEvent extends WebManagementEvent
public class WebRequestEvent extends WebManagementEvent
Not applicable.

The WebRequestEvent is raised at every Web request.

It uses the WebRequestInformation class to obtain request information.


In most cases you will use the standard ASP.NET health-monitoring types and control their behavior by setting the healthMonitoring configuration section. You can also create custom types, as shown in the next example. If you create your custom event type and you need to add your own information, customize the FormatCustomEventDetails method. This will avoid overwriting or tampering with sensitive system information.

The following code example shows how to derive from the WebRequestEvent class to create a custom event.

using System;
using System.Text;
using System.Web;
using System.Web.Management;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace SamplesAspNet
    // Implements a custom WebRequestEvent. 
    public class SampleWebRequestEvent :
        private string  customCreatedMsg, 

        // Invoked in case of events identified only 
        // by their event code.
        public SampleWebRequestEvent(
            string msg, 
            object eventSource, int eventCode): 
            base(msg, eventSource, eventCode)
            // Perform custom initialization.
            customCreatedMsg =
              "Event created at: {0}", 

        // Invoked in case of events identified 
        // by their event code.and 
        // related event detailed code.
        public SampleWebRequestEvent(string msg,
            object eventSource, int eventCode,
            int eventDetailCode):
            base(msg, eventSource, eventCode, 
            // Perform custom initialization.
            customCreatedMsg =
              "Event created at: {0}", 


        // Raises the SampleWebRequestEvent.
        public override void Raise()
            // Perform custom processing.
            customRaisedMsg =
              "Event raised at: {0}", 

            // Raise the event.

        //Formats Web request event information.
        public override void FormatCustomEventDetails(
            WebEventFormatter formatter)
            // Add custom data.

            formatter.IndentationLevel += 1;
                "* Custom Request Information Start *");

            //// Display custom event timing.

                "* Custom Request Information End *");

            formatter.IndentationLevel -= 1;



The following is an excerpt of the configuration file that enables ASP.NET to use the custom event.

  enabled="true" heartBeatInterval="0">
    <!-- Define the custom provider that 
         processes custom Web request events. -->
    <add name="SampleWebEventProvider" 
type="SamplesAspNet.SampleEventProvider,webeventprovider,Version=1.0.1573.18094, Culture=neutral, PublicKeyToken=b5a57a9a9d487cf4, processorArchitecture=MSIL"/>

    <!--  Define the event source that 
         issues custom events.   -->
    <add  name="SampleWebRequestEvent" 
type="SamplesAspNet.SampleWebRequestEvent,webrequestevent,Version=1.0.1573.23947, Culture=neutral, PublicKeyToken=e717d983a78c8ddb, processorArchitecture=MSIL"/>
        <!-- Associate custom event with 
        related custom provider -->

  • AspNetHostingPermission  for operating in a hosted environment. Demand value: LinkDemand; Permission value: Minimal.
  • AspNetHostingPermission  for operating in a hosted environment. Demand value: InheritanceDemand; Permission value: Minimal.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0