WebRequestEvent Class

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

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

[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class WebRequestEvent : WebManagementEvent

The WebRequestEvent is raised at every Web request.

It uses the WebRequestInformation class to obtain request information.

NoteNote:

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 :
      System.Web.Management.WebRequestEvent
    {
        private string  customCreatedMsg, 
                        customRaisedMsg;

        // 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 =
              string.Format(
              "Event created at: {0}", 
              EventTime.ToString());
        }


        // 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, 
            eventDetailCode)
        {
            // Perform custom initialization.
            customCreatedMsg =
              string.Format(
              "Event created at: {0}", 
              EventTime.ToString());

        }


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

            // Raise the event. 
            base.Raise();
        }


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

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

            //// Display custom event timing.
            formatter.AppendLine(customCreatedMsg);
            formatter.AppendLine(customRaisedMsg);

            formatter.AppendLine(
                "* 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.

<healthMonitoring 
  enabled="true" heartBeatInterval="0">
  <providers>
    <!-- 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"/>
  </providers>

  <eventMappings>
    <!--  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"/>
    </eventMappings>
  
  <rules>
        <!-- Associate custom event with 
        related custom provider -->
    <add 
      name="CustomWebRequestEvent"
      eventName="SampleWebRequestEvent" 
      provider="SampleWebEventProvider" 
      profile="Critical"/>
  </rules>
</healthMonitoring>

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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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