Exception.HelpLinkとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

Exception.HelpLink プロパティ

例外に関連付けられているヘルプファイルへのリンクを取得または設定します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Overridable Property
 HelpLink As String

Visual Basic (使用法)

Dim instance As Exception
Dim value As String

value = instance.HelpLink

instance.HelpLink = value

public virtual string HelpLink { get;
 set; }

C++

public:
virtual property String^ HelpLink {
    String^ get ();
    void set (String^ value);
}

/** @property */
public String get_HelpLink ()

/** @property */
public void set_HelpLink (String value)

JScript

public function get HelpLink
 () : String

public function set HelpLink
 (value : String)

プロパティ値
URN (Uniform Resource Name) または URL (Uniform Resource Locator)。

解説

ヘルプファイルを表す戻り値は、URN または URL です。たとえば、HelpLink は次のような値になります。

"file:///C:/Applications/Bazzal/help.html#ErrorNum42"

使用例

この例では、HelpLink プロパティをコンストラクタに設定する Exception をスローし、その例外をキャッチして HelpLink を表示します。

Visual Basic

' Example for the Exception.HelpLink, Exception.Source,
' Exception.StackTrace, and Exception.TargetSite properties.
Imports System
Imports Microsoft.VisualBasic

Namespace NDP_UE_VB

    ' Derive an exception; the constructor sets the HelpLink and 
    ' Source properties.
    Class LogTableOverflowException
        Inherits Exception

        Private Const overflowMessage As
 String = _
            "The log table has overflowed."
           
        Public Sub New(
 auxMessage As String, inner As
 Exception )
            MyBase.New( String.Format( "{0}
 - {1}", _
                overflowMessage, auxMessage ), inner )

            Me.HelpLink = "http://msdn.microsoft.com"
            Me.Source = "Exception_Class_Samples"

        End Sub ' New
    End Class ' LogTableOverflowException

    Class LogTable
       
        Public Sub New(numElements
 As Integer)
            logArea = New String(numElements)
 {}
            elemInUse = 0
        End Sub ' New
           
        Protected logArea() As String
        Protected elemInUse As Integer
           
        ' The AddRecord method throws a derived exception if 
        ' the array bounds exception is caught.
        Public Function AddRecord( newRecord
 As String ) As Integer

            Try
                Dim curElement as Integer
 = elemInUse
                logArea( elemInUse ) = newRecord
                elemInUse += 1
                Return curElement

            Catch ex As Exception
                Throw New LogTableOverflowException(
 _
                    String.Format( "Record
 ""{0}"" was not logged.",
 _
                        newRecord ), ex )
            End Try
        End Function ' AddRecord
    End Class ' LogTable

    Module OverflowDemo
       
        ' Create a log table and force an overflow.
        Sub Main( )
            Dim log As New
 LogTable( 4 )
              
            Console.WriteLine( "This example of "
 & vbCrLf & _
                "   Exception.Message, " & vbCrLf
 & _
                "   Exception.HelpLink, " & vbCrLf
 & _
                "   Exception.Source, " & vbCrLf
 & _
                "   Exception.StackTrace, and " &
 vbCrLf & _
                "   Exception.TargetSite " & vbCrLf
 & _
                "generates the following output."
 )
              
            Try
                Dim count As Integer
 = 0
                 
                Do
                    log.AddRecord( _
                        String.Format( "Log
 record number {0}", count ) )
                    count += 1
                Loop

            Catch ex As Exception
                Console.WriteLine( vbCrLf & _
                    "Message ---" & vbCrLf &
 ex.Message )
                Console.WriteLine( vbCrLf & _
                    "HelpLink ---" & vbCrLf &
 ex.HelpLink )
                Console.WriteLine( vbCrLf & _
                    "Source ---" & vbCrLf &
 ex.Source )
                Console.WriteLine( vbCrLf & _
                    "StackTrace ---" & vbCrLf
 & ex.StackTrace )
                Console.WriteLine( vbCrLf & "TargetSite ---"
 & _
                    vbCrLf & ex.TargetSite.ToString( ) )
            End Try
        End Sub ' Main

    End Module ' OverflowDemo
End Namespace ' NDP_UE_VB

' This example of
'    Exception.Message,
'    Exception.HelpLink,
'    Exception.Source,
'    Exception.StackTrace, and
'    Exception.TargetSite
' generates the following output.
' 
' Message ---
' The log table has overflowed. - Record "Log record number 5"
 was not logged.
' 
' HelpLink ---
' http://msdn.microsoft.com
' 
' Source ---
' Exception_Class_Samples
' 
' StackTrace ---
'    at NDP_UE_VB.LogTable.AddRecord(String newRecord)
'    at NDP_UE_VB.OverflowDemo.Main()
' 
' TargetSite ---
' Int32 AddRecord(System.String)

// Example for the Exception.HelpLink, Exception.Source,
// Exception.StackTrace, and Exception.TargetSite properties.
using System;

namespace NDP_UE_CS
{
    // Derive an exception; the constructor sets the HelpLink and 
    // Source properties.
    class LogTableOverflowException : Exception
    {
        const string overflowMessage = "The
 log table has overflowed.";

        public LogTableOverflowException( 
            string auxMessage, Exception inner ) :
                base( String.Format( "{0} - {1}", 
                    overflowMessage, auxMessage ), inner )
        {
            this.HelpLink = "http://msdn.microsoft.com";
            this.Source = "Exception_Class_Samples";
        }
    }

    class LogTable
    {
        public LogTable( int numElements )
        {
            logArea = new string[ numElements
 ];
            elemInUse = 0;
        }

        protected string[ ] logArea;
        protected int       elemInUse;

        // The AddRecord method throws a derived exception if 
        // the array bounds exception is caught.
        public    int       AddRecord( string
 newRecord )
        {
            try
            {
                logArea[ elemInUse ] = newRecord;
                return elemInUse++;
            }
            catch( Exception e )
            {
                throw new LogTableOverflowException( 
                    String.Format( "Record \"{0}\" was not logged.",
 
                        newRecord ), e );
            }
        }
    }

    class OverflowDemo 
    {
        // Create a log table and force an overflow.
        public static void
 Main() 
        {
            LogTable log = new LogTable( 4 );

            Console.WriteLine( 
                "This example of \n   Exception.Message, \n" +
                "   Exception.HelpLink, \n   Exception.Source, \n" +
                "   Exception.StackTrace, and \n   Exception." +
                "TargetSite \ngenerates the following output." );

            try
            {
                for( int count = 1; ; count++
 )
                {
                    log.AddRecord( 
                        String.Format( 
                            "Log record number {0}", count ) );
                }
            }
            catch( Exception ex )
            {
                Console.WriteLine( "\nMessage ---\n{0}", ex.Message );
                Console.WriteLine( 
                    "\nHelpLink ---\n{0}", ex.HelpLink );
                Console.WriteLine( "\nSource ---\n{0}", ex.Source );
                Console.WriteLine( 
                    "\nStackTrace ---\n{0}", ex.StackTrace );
                Console.WriteLine( 
                    "\nTargetSite ---\n{0}", ex.TargetSite );
            }
        }
    }
}

/*
This example of
   Exception.Message,
   Exception.HelpLink,
   Exception.Source,
   Exception.StackTrace, and
   Exception.TargetSite
generates the following output.

Message ---
The log table has overflowed. - Record "Log record number 5" was not logged.

HelpLink ---
http://msdn.microsoft.com

Source ---
Exception_Class_Samples

StackTrace ---
   at NDP_UE_CS.LogTable.AddRecord(String newRecord)
   at NDP_UE_CS.OverflowDemo.Main()

TargetSite ---
Int32 AddRecord(System.String)
*/

C++

// Example for the Exception::HelpLink, Exception::Source,
// Exception::StackTrace, and Exception::TargetSite properties.
using namespace System;

namespace NDP_UE_CPP
{

   // Derive an exception; the constructor sets the HelpLink and 
   // Source properties.
   public ref class LogTableOverflowException:
 public Exception
   {
   private:
      static String^ overflowMessage = "The log table has
 overflowed.";

   public:
      LogTableOverflowException( String^ auxMessage, Exception^ inner )
         : Exception( String::Format( "{0} - {1}", overflowMessage, auxMessage
 ), inner )
      {
         this->HelpLink = "http://msdn.microsoft.com";
         this->Source = "Exception_Class_Samples";
      }

   };

   public ref class LogTable
   {
   public:
      LogTable( int numElements )
      {
         logArea = gcnew array<String^>(numElements);
         elemInUse = 0;
      }


   protected:
      array<String^>^logArea;
      int elemInUse;

   public:

      // The AddRecord method throws a derived exception if 
      // the array bounds exception is caught.
      int AddRecord( String^ newRecord )
      {
         try
         {
            logArea[ elemInUse ] = newRecord;
            return elemInUse++;
         }
         catch ( Exception^ ex ) 
         {
            throw gcnew LogTableOverflowException( String::Format( "Record \"{0}\"
 was not logged.", newRecord ),ex );
         }

      }

   };


   // Create a log table and force an overflow.
   void ForceOverflow()
   {
      LogTable^ log = gcnew LogTable( 4 );
      try
      {
         for ( int count = 1; ; count++ )
         {
            log->AddRecord( String::Format( "Log record number {0}",
 count ) );

         }
      }
      catch ( Exception^ ex ) 
      {
         Console::WriteLine( "\nMessage ---\n{0}", ex->Message );
         Console::WriteLine( "\nHelpLink ---\n{0}", ex->HelpLink );
         Console::WriteLine( "\nSource ---\n{0}", ex->Source );
         Console::WriteLine( "\nStackTrace ---\n{0}", ex->StackTrace
 );
         Console::WriteLine( "\nTargetSite ---\n{0}", ex->TargetSite->ToString()
 );
      }

   }

}

int main()
{
   Console::WriteLine( "This example of \n   Exception::Message, \n"
   "   Exception::HelpLink, \n   Exception::Source, \n"
   "   Exception::StackTrace, and \n   Exception::"
   "TargetSite \ngenerates the following output." );
   NDP_UE_CPP::ForceOverflow();
}

/*
This example of
   Exception::Message,
   Exception::HelpLink,
   Exception::Source,
   Exception::StackTrace, and
   Exception::TargetSite
generates the following output.

Message ---
The log table has overflowed. - Record "Log record number 5" was not logged.

HelpLink ---
http://msdn.microsoft.com

Source ---
Exception_Class_Samples

StackTrace ---
   at NDP_UE_CPP.LogTable.AddRecord(String newRecord)
   at NDP_UE_CPP.ForceOverflow()

TargetSite ---
Int32 AddRecord(System.String)
*/

// Example for the Exception.HelpLink, Exception.Source,
// Exception.StackTrace, and Exception.TargetSite properties.
package NDP_UE_JSL; 

import System.* ;

// Derive an exception; the constructor sets the HelpLink and 
// Source properties.
class LogTableOverflowException extends System.Exception
{
    private String overflowMessage = "The log table has overflowed.";

    public LogTableOverflowException(System.String auxMessage,
 
        System.Exception inner)
    {
        super(String.Format("The log table has overflowed. - {0}", 
            auxMessage), inner);
        this.set_HelpLink("http://msdn.microsoft.com");
        this.set_Source("Exception_Class_Samples");
    } //LogTableOverflowException
} //LogTableOverflowException

class LogTable
{
    public LogTable(int numElements)
    {
        logArea = new String[numElements];
        elemInUse = 0;
    } //LogTable

    protected String logArea[];
    protected int elemInUse;

    // The AddRecord method throws a derived exception if 
    // the array bounds exception is caught.
    public int AddRecord(String newRecord)
 throws LogTableOverflowException
    {
        try {
            logArea.set_Item(elemInUse, newRecord);
            return elemInUse++;
        }
        catch (System.Exception e) {
            throw new LogTableOverflowException(
                String.Format("Record \"{0}\" was not logged.",
 newRecord), e);
        }
    } //AddRecord
} //LogTable

class OverflowDemo
{
    // Create a log table and force an overflow.
    public static void main(String[]
 args)
    {
        LogTable log = new LogTable(4);

        Console.WriteLine(("This example of \n   Exception.Message, \n"
 
            + "   Exception.HelpLink, \n   Exception.Source, \n" 
            + "   Exception.StackTrace, and \n   Exception." 
            + "TargetSite \ngenerates the following output."));
        
        try {
            for (int count = 1; ; count++)
 {
                log.AddRecord(String.Format("Log record number {0}", 
                    System.Convert.ToString(count)));
            }
        }
        catch (System.Exception ex) {
            Console.WriteLine("\nMessage ---\n{0}", ex.get_Message());
            Console.WriteLine("\nHelpLink ---\n{0}", ex.get_HelpLink());
            Console.WriteLine("\nSource ---\n{0}", ex.get_Source());
            Console.WriteLine("\nStackTrace ---\n{0}", ex.get_StackTrace());
            Console.WriteLine("\nTargetSite ---\n{0}", ex.get_TargetSite());
        }
    } //main
} //OverflowDemo
   
/*
   Exception.Message,
   Exception.HelpLink,
   Exception.Source,
   Exception.StackTrace, and
   Exception.TargetSite
generates the following output.

Message ---
The log table has overflowed. - Record "Log record number 5" was not logged.

HelpLink ---
http://msdn.microsoft.com

Source ---
Exception_Class_Samples

StackTrace ---
   at NDP_UE_JSL.LogTable.AddRecord(String newRecord) in D:\Test\ConsoleApplicat
ion7\ConsoleApplication7\Class1.jsl:line 45
   at NDP_UE_JSL.OverflowDemo.main(String[] args) in D:\Test\ConsoleApplication7
\ConsoleApplication7\Class1.jsl:line 62

TargetSite ---
Int32 AddRecord(System.String)
 */

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
Exception クラス
Exception メンバ
System 名前空間

_Exception.HelpLink プロパティ

メモ : このプロパティは、.NET Framework version 2.0 で新しく追加されたものです。

COM オブジェクトに、Exception.HelpLink プロパティへのバージョンに依存しないアクセスが用意されています。

このプロパティは、CLS に準拠していません。

名前空間: System.Runtime.InteropServices
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Property HelpLink As String

Visual Basic (使用法)

Dim instance As _Exception
Dim value As String

value = instance.HelpLink

instance.HelpLink = value

string HelpLink { get; set;
 }

C++

property String^ HelpLink {
    String^ get ();
    void set (String^ value);
}

/** @property */
String get_HelpLink ()

/** @property */
void set_HelpLink (String value)

JScript

function get HelpLink () : String

function set HelpLink (value : String)

プロパティ値
ヘルプファイルへの URN (Uniform Resource Name) または URL (Uniform Resource Locator)。

解説

このメソッドは、アンマネージコードからマネージクラスにアクセスするためのメソッドであるため、マネージコードからは呼び出さないでください。

Exception.HelpLink プロパティは、この例外に関連付けられているヘルプファイルへのリンクを取得または設定します。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
_Exception インターフェイス
_Exception メンバ
System.Runtime.InteropServices 名前空間
Exception.HelpLink

>> 「Exception.HelpLink」を含む用語の索引
Exception.HelpLinkのページへのリンク

Exception.HelpLinkとは？わかりやすく解説

Exception.HelpLink プロパティ

_Exception.HelpLink プロパティ

「Exception.HelpLink」の関連用語


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Exception.HelpLinkとは？ わかりやすく解説

Exception.HelpLink プロパティ

_Exception.HelpLink プロパティ

急上昇のことば

「Exception.HelpLink」の関連用語

Exception.HelpLinkとは？わかりやすく解説