WebRequestErrorEvent クラス
アセンブリ: System.Web (system.web.dll 内)


WebRequestErrorEvent は、Web 要求中にエラーが生じると発生します。アプリケーションは、このイベントを使用して、要求関連の情報を WebRequestInformation クラスおよび WebThreadInformation クラスの定義に従って取得する必要があります。
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ほとんどの場合、標準の ASP.NET 状態監視型を使用し、healthMonitoring 構成セクションを設定して動作を制御します。次の例に示すようなカスタム型を作成することもできます。カスタム イベント型を作成し、独自の情報を追加する必要がある場合は、FormatCustomEventDetails メソッドをカスタマイズします。これにより、重要なシステム情報に対する上書きや不正な変更を防げます。 |

次のコードは、2 つの部分で構成されます。最初は、ASP.NET でカスタム イベントを使用できるようにする構成ファイルの抜粋です。次は、WebRequestErrorEvent クラスの派生としてカスタム イベントを作成する方法です。
<healthMonitoring enabled="true" heartBeatInterval="0"> <eventMappings> <add name="SampleWebRequestErrorEvent" type="SamplesAspNet.SampleWebRequestErrorEvent,webrequesterrorevent,Version=1.0.1573.21654, Culture=neutral, PublicKeyToken=63ada862a6c5af13, processorArchitecture=MSIL"/> </eventMappings> <rules> <add name="Custom Web Request Error Events" eventName="SampleWebRequestErrorEvent" provider="EventLogProvider" profile="Critical"/> </rules> </healthMonitoring>
Imports System Imports System.Text Imports System.Web Imports System.Web.Management ' Implements a custom WebRequestErrorEvent class. Public Class SampleWebRequestErrorEvent Inherits WebRequestErrorEvent Private eventInfo As StringBuilder ' Invoked in case of events ' identified only by their event code. Public Sub New(ByVal msg As String, _ ByVal eventSource As Object, _ ByVal eventCode As Integer, _ ByVal e As Exception) MyBase.New(msg, eventSource, _ eventCode, e) ' Perform custom initialization. eventInfo = New StringBuilder() eventInfo.Append(String.Format( _ "Event created at: ", _ EventTime.ToString())) End Sub 'New ' Invoked in case of events identified ' by their event code.and related event ' detailed code. Public Sub New(ByVal msg As String, _ ByVal eventSource As Object, _ ByVal eventCode As Integer, _ ByVal detailedCode As Integer, _ ByVal e As Exception) MyBase.New(msg, eventSource, _ eventCode, detailedCode, e) ' Perform custom initialization. eventInfo = New StringBuilder() eventInfo.Append(String.Format( _ "Event created at: ", _ EventTime.ToString())) End Sub 'New ' Raises the SampleWebRequestErrorEvent. Public Overrides Sub Raise() ' Perform custom processing. eventInfo.Append(String.Format( _ "Event raised at: ", _ EventTime.ToString())) ' Raise the event. MyBase.Raise() End Sub 'Raise ' Obtains the current request information. Public Function GetRequestInfo() As String Dim reqInfo As String = GetRequestInfo() Return reqInfo End Function 'GetRequestInfo ' Obtains the current thread information. Public Function GetThreadInfo() As String Dim threadInfo As String = GetThreadInfo() Return threadInfo End Function 'GetThreadInfo ' Obtains the current process information. Public Function GetProcessInfo() As String Dim procInfo As String = GetProcessInfo() Return procInfo End Function 'GetProcessInfo 'Formats Web request event information. Public Overrides Sub FormatCustomEventDetails( _ ByVal formatter As WebEventFormatter) MyBase.FormatCustomEventDetails(formatter) ' Add custom data. formatter.AppendLine("") formatter.IndentationLevel += 1 formatter.AppendLine( _ "** SampleWebRequestEvent Start **") ' Add custom data. formatter.AppendLine(eventInfo.ToString()) formatter.AppendLine( _ "** SampleWebRequestEvent End **") End Sub 'FormatCustomEventDetails End Class 'SampleWebRequestErrorEvent
using System; using System.Text; using System.Web; using System.Web.Management; namespace Samples.AspNet.Management { // Implements a custom WebRequestErrorEvent class. public class SampleWebRequestErrorEvent : WebRequestErrorEvent { private StringBuilder eventInfo; // Invoked in case of events // identified only by their event code. public SampleWebRequestErrorEvent(string msg, object eventSource, int eventCode, Exception e): base(msg, eventSource, eventCode, e) { // Perform custom initialization. eventInfo = new StringBuilder(); eventInfo.Append(string.Format( "Event created at: ", EventTime.ToString())); } // Invoked in case of events identified // by their event code.and related event // detailed code. public SampleWebRequestErrorEvent( string msg, object eventSource, int eventCode, int detailedCode, Exception e): base(msg, eventSource, eventCode, detailedCode, e) { // Perform custom initialization. eventInfo = new StringBuilder(); eventInfo.Append(string.Format( "Event created at: ", EventTime.ToString())); } // Raises the SampleWebRequestErrorEvent. public override void Raise() { // Perform custom processing. eventInfo.Append(string.Format( "Event raised at: ", EventTime.ToString())); // Raise the event. base.Raise(); } // Obtains the current request information. public string GetRequestInfo() { string reqInfo = GetRequestInfo(); return reqInfo; } // Obtains the current thread information. public string GetThreadInfo() { string threadInfo = GetThreadInfo(); return threadInfo; } // Obtains the current process information. public string GetProcessInfo() { string procInfo = GetProcessInfo(); return procInfo; } //Formats Web request event information. public override void FormatCustomEventDetails( WebEventFormatter formatter) { base.FormatCustomEventDetails(formatter); // Add custom data. formatter.AppendLine(""); formatter.IndentationLevel += 1; formatter.AppendLine( "** SampleWebRequestEvent Start **"); // Add custom data. formatter.AppendLine(eventInfo.ToString()); formatter.AppendLine( "** SampleWebRequestEvent End **"); } } }

System.Web.Management.WebBaseEvent
System.Web.Management.WebManagementEvent
System.Web.Management.WebBaseErrorEvent
System.Web.Management.WebRequestErrorEvent


Windows 98, Windows 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
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


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