WebEventProvider Klasse

Definition

public ref class WebEventProvider abstract : System::Configuration::Provider::ProviderBase

public abstract class WebEventProvider : System.Configuration.Provider.ProviderBase

type WebEventProvider = class
    inherit ProviderBase

Public MustInherit Class WebEventProvider
Inherits ProviderBase

Vererbung

Object

ProviderBase

WebEventProvider

Abgeleitet

System.Web.Management.BufferedWebEventProvider

System.Web.Management.EventLogWebEventProvider

System.Web.Management.IisTraceWebEventProvider

System.Web.Management.TraceWebEventProvider

System.Web.Management.WmiWebEventProvider

Beispiele

Das folgende Codebeispiel zeigt, wie Sie von der WebEventProvider -Klasse ableiten, um einen benutzerdefinierten Anbieter zu erstellen, der die konfigurierten Ereignisse in eine lokale Datei schreibt, für die entsprechende Zugriffsrechte erteilt werden müssen. Dieses Benutzerdefinierte Anbieterbeispiel ist einfach, und seine Hauptabsicht besteht darin, Ihnen als Entwickler die vollständige Kontrolle über seine grundlegenden Mechanismen zu geben. In einem realen Szenario können Sie diesen Anbieter und insbesondere den unter BufferedWebEventProviderverfügbaren gepufferten Beispielanbieter als vorläufigen Test für das Verhalten einer Anwendung verwenden. Dies kann Ihnen während der Entwurfsphase helfen, ein Verständnis der verfügbaren Informationen zu erhalten. später können Sie diese Informationen an einen komplexeren Anbieter weiterleiten.

Der folgende Konfigurationsdateiauszug zeigt eine healthMonitoring Abschnittskonfiguration, die es ASP.NET ermöglicht, den oben definierten benutzerdefinierten Anbieter zum Verarbeiten aller Integritätsüberwachungsereignisse zu verwenden.

<healthMonitoring   
  heartBeatInterval="0"   
  enabled="true">  

    <providers>  

      <add name="SampleWebEventProvider"   
        type="SamplesAspNet.SampleEventProvider,webeventprovider, Version=1.0.1773.33989, Culture=neutral, PublicKeyToken=cf85aa6c978d9dea, processorArchitecture=MSIL" />  

    </providers>  

    <rules>  

      <rule   
        name="Custom Event Provider"  
        eventName="All Events"  
        provider="SampleWebEventProvider"  
        profile="Default" />  
    </rules>  

</healthMonitoring>  

using System;
using System.Text;
using System.IO;
using System.Web.Management;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Web;

namespace SamplesAspNet
{
  // Implements a custom event provider.
    public class SampleEventProvider : 
        System.Web.Management.WebEventProvider
    {

        // The local path of the file where
        // to store event information.
        private string logFilePath;
    
        // The current number of buffered messages 
        private int msgCounter;

        // The max number of messages to buffere.
        private int maxMsgNumber;

        // The message buffer.
        private System.Collections.Generic.Queue
            <WebBaseEvent> msgBuffer = 
            new Queue<WebBaseEvent>();

        // Initializes the provider.
        public SampleEventProvider(): base()
        {

            // Initialize the local path of the file 
            // that holds event information.
            logFilePath = "C:/test/log.doc";

            // Clear the message buffer.
            msgBuffer.Clear();

            // Initialize the max number of messages
            // to buffer.
            maxMsgNumber = 10;

            // More custom initialization goes here.
        }

        // Flush the input buffer if required.
        public override void Flush()
        {
            // Create a string builder to 
            // hold the event information.
            StringBuilder reData = new StringBuilder();

            // Store custom information.
            reData.Append("SampleEventProvider processing." +
                Environment.NewLine);
            reData.Append("Flush done at: {0}" +
                DateTime.Now.TimeOfDay.ToString() +
                Environment.NewLine);
            
            foreach (WebBaseEvent e in msgBuffer)
            {
                // Store event data.
                reData.Append(e.ToString());
            }

            // Store the information in the specified file.
            StoreToFile(reData, logFilePath, FileMode.Append);

            // Reset the message counter.
            msgCounter = 0;
            
            // Clear the buffer.
            msgBuffer.Clear();
        }


        // Shutdown the provider.
        public override void Shutdown()
        {
            Flush();
        }


        // Process the event that has been raised.
        public override void ProcessEvent(WebBaseEvent raisedEvent)
        { 
            if (msgCounter < maxMsgNumber)
            {
                // Buffer the event information.
                msgBuffer.Enqueue(raisedEvent);
                // Increment the message counter.
                msgCounter += 1;
            }
            else
            {
                // Flush the buffer.
                Flush();
            }
        }



        // Store event information in a local file.
        private void StoreToFile(StringBuilder text, 
            string filePath, FileMode mode)
        {
            int writeBlock;
            int startIndex;

            try
            {

                writeBlock = 256;
                startIndex = 0;

                // Open or create the local file 
                // to store the event information.
                FileStream fs = new FileStream(filePath, 
                    mode, FileAccess.Write);

                // Lock the file for writing.
                fs.Lock(startIndex, writeBlock);

                // Create a stream writer
                StreamWriter writer = new StreamWriter(fs);

                // Set the file pointer to the current 
                // position to keep adding data to it. 
                // If you want to rewrite the file use 
                // the following statement instead.
                // writer.BaseStream.Seek (0, SeekOrigin.Begin);
                writer.BaseStream.Seek(0, SeekOrigin.Current);

                //If the file already exists it must not 
                // be write protected otherwise  
                // the following write operation fails silently.
                writer.Write(text.ToString());

                // Update the underlying file
                writer.Flush();

                // Unlock the file for other processes.
                fs.Unlock(startIndex, writeBlock);

                // Close the stream writer and the underlying file     
                writer.Close();

                fs.Close();
            }
            catch (Exception e)
            {
                throw new Exception(
                    "SampleEventProvider.StoreToFile: " 
                    + e.ToString());
            }
        }
    }
}

Imports System.Text
Imports System.IO
Imports System.Web.Management
Imports System.Collections.Generic
Imports System.Collections.Specialized
Imports System.Web



' Implements a custom event provider.

Public Class SampleEventProvider
    Inherits System.Web.Management.WebEventProvider
    
    ' The local path of the file where
    ' to store event information.
    Private logFilePath As String
    
    ' The current number of buffered messages 
    Private msgCounter As Integer
    
    ' The max number of messages to buffere.
    Private maxMsgNumber As Integer
    
    ' The message buffer.
    '  private System.Collections.Generic.Queue
    Private msgBuffer _
    As System.Collections.Generic.Queue( _
    Of System.Web.Management.WebBaseEvent) = _
    New System.Collections.Generic.Queue( _
    Of System.Web.Management.WebBaseEvent)


    ' Initializes the provider.
    Public Sub New() 
        
        ' Initialize the local path of the file 
        ' that holds event information.
        logFilePath = "C:/test/log.doc"
        
        ' Clear the message buffer.
        msgBuffer.Clear()
        
        ' Initialize the max number of messages
        ' to buffer.
        maxMsgNumber = 10
    
    End Sub
     
    ' More custom initialization goes here.
    
    ' Flush the input buffer if required.
    Public Overrides Sub Flush() 
        ' Create a string builder to 
        ' hold the event information.
        Dim reData As New StringBuilder()
        
        ' Store custom information.
        reData.Append( _
        "SampleEventProvider processing." + _
        Environment.NewLine)

        reData.Append( _
        "Flush done at: {0}" + _
        DateTime.Now.TimeOfDay.ToString() + _
        Environment.NewLine)
        
        Dim e As WebBaseEvent
        For Each e In  msgBuffer
            ' Store event data.
            reData.Append(e.ToString())
        Next e
        
        ' Store the information in the specified file.
        StoreToFile(reData, logFilePath, FileMode.Append)
        
        ' Reset the message counter.
        msgCounter = 0
        
        ' Clear the buffer.
        msgBuffer.Clear()
    
    End Sub
     
    ' Shutdown the provider.
    Public Overrides Sub Shutdown() 
        Flush()
    
    End Sub
    
    ' Process the event that has been raised.
    Public Overrides Sub ProcessEvent( _
    ByVal raisedEvent As WebBaseEvent)

        If msgCounter < maxMsgNumber Then
            ' Buffer the event information.
            msgBuffer.Enqueue(raisedEvent)
            ' Increment the message counter.
            msgCounter += 1
        Else
            ' Flush the buffer.
            Flush()
        End If

    End Sub
    
    
    ' Store event information in a local file.
    Private Sub StoreToFile( _
    ByVal [text] As StringBuilder, _
    ByVal filePath As String, _
    ByVal mode As FileMode)
        Dim writeBlock As Integer
        Dim startIndex As Integer

        Try

            writeBlock = 256
            startIndex = 0

            ' Open or create the local file 
            ' to store the event information.
            Dim fs As New FileStream( _
            filePath, mode, FileAccess.Write)

            ' Lock the file for writing.
            fs.Lock(startIndex, writeBlock)

            ' Create a stream writer
            Dim writer As New StreamWriter(fs)

            ' Set the file pointer to the current 
            ' position to keep adding data to it. 
            ' If you want to rewrite the file use 
            ' the(following) statement instead.
            ' writer.BaseStream.Seek (0, SeekOrigin.Begin);
            writer.BaseStream.Seek(0, SeekOrigin.Current)

            'If the file already exists it must 
            'not be write protected, otherwise  
            'the following write operation fails silently.
            writer.Write([text].ToString())

            ' Update the underlying file
            writer.Flush()

            ' Unlock the file for other processes.
            fs.Unlock(startIndex, writeBlock)

            ' Close the stream writer and the underlying file     
            writer.Close()

            fs.Close()
        Catch e As Exception
            Throw New Exception( _
            "SampleEventProvider.StoreToFile: " + _
            e.ToString())
        End Try

    End Sub
End Class

Hinweise

mit ASP.NET Integritätsüberwachung können Mitarbeiter von Produktion und Betrieb bereitgestellte Webanwendungen verwalten. Der System.Web.Management Namespace enthält die Integritätsereignistypen, die für das Packen von Anwendungsintegritätsdaten verantwortlich sind, und die Anbietertypen, die für die Verarbeitung dieser Daten verantwortlich sind. Es enthält auch unterstützende Typen, die bei der Verwaltung von Integritätsereignissen helfen.

Wenn Sie die Verarbeitung von Integritätsereignissen anpassen möchten, können Sie von der WebEventProvider -Klasse ableiten, um einen eigenen benutzerdefinierten Anbieter zu erstellen.

Konstruktoren

Eigenschaften

Methoden

Gilt für:

Weitere Informationen

• Übersicht über die ASP.NET-Integritätsüberwachung
• Beispiel: Benutzerdefinierter Ereignisanbieter
• Installieren und Konfigurieren von ASP.NET-Anbietern