TypeLoadException Konstruktoren

Definition

Initialisiert eine neue Instanz der TypeLoadException-Klasse.Initializes a new instance of the TypeLoadException class.

Überlädt

TypeLoadException()

Initialisiert eine neue Instanz der TypeLoadException-Klasse.Initializes a new instance of the TypeLoadException class.

TypeLoadException(String)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit einer angegebenen Fehlermeldung.Initializes a new instance of the TypeLoadException class with a specified error message.

TypeLoadException(SerializationInfo, StreamingContext)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit serialisierten Daten.Initializes a new instance of the TypeLoadException class with serialized data.

TypeLoadException(String, Exception)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit einer angegebenen Fehlermeldung und einem Verweis auf die innere Ausnahme, die diese Ausnahme ausgelöst hat.Initializes a new instance of the TypeLoadException class with a specified error message and a reference to the inner exception that is the cause of this exception.

TypeLoadException()

Initialisiert eine neue Instanz der TypeLoadException-Klasse.Initializes a new instance of the TypeLoadException class.

public:
 TypeLoadException();
public TypeLoadException ();
Public Sub New ()

Hinweise

Dieser Konstruktor initialisiert die Message-Eigenschaft der neuen Instanz mit einer vom System bereitgestellten Meldung, die den Fehler beschreibt, z. b. "Fehler beim Laden eines Typs."This constructor initializes the Message property of the new instance to a system-supplied message that describes the error, such as "A failure has occurred while loading a type." Diese Meldung berücksichtigt die aktuelle Systemkultur.This message takes into account the current system culture.

In der folgenden Tabelle werden die anfänglichen Eigenschaftenwerte für eine TypeLoadException-Instanz aufgeführt.The following table shows the initial property values for an instance of TypeLoadException.

EigenschaftProperty WertValue
InnerException Ein NULL-Verweis (Nothing in Visual Basic).A null reference (Nothing in Visual Basic).
Message Die Zeichenfolge der lokalisierten Fehlermeldung.The localized error message string.

TypeLoadException(String)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit einer angegebenen Fehlermeldung.Initializes a new instance of the TypeLoadException class with a specified error message.

public:
 TypeLoadException(System::String ^ message);
public TypeLoadException (string message);
new TypeLoadException : string -> TypeLoadException
Public Sub New (message As String)

Parameter

message
String

Die Meldung, die den Fehler beschreibt.The message that describes the error.

Beispiele

Im folgenden Codebeispiel wird der TypeLoadException(String)-Konstruktor veranschaulicht.The following code example demonstrates the TypeLoadException(String) constructor. Sie enthält eine Methode, die eine TypeLoadException mit einer benutzerdefinierten Meldung generiert und die Fehlermeldung in der Konsole anzeigt.It contains a method that generates a TypeLoadException with a custom message, and displays the error message to the console.

using namespace System;

class TypeLoadExceptionDemoClass
{
   public:
      static bool GenerateException()
      {
         // Throw a TypeLoadException with a custom message.
         throw gcnew TypeLoadException("This is a custom TypeLoadException error message.");
      }
};

int main()
{
   try {
      // Call a method that throws an exception.  
      TypeLoadExceptionDemoClass::GenerateException();
   }
   catch ( TypeLoadException^ e ) {
      Console::WriteLine("TypeLoadException:\n   {0}", e->Message);
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: \n\tError Message = {0}", e->Message );
   }

}
// The example displays the following output:
//       TypeLoadException:
//          This is a custom TypeLoadException error message.
using System;

public class Example
{
   public static void Main() 
   {
      try {
         // Call a method that throws an exception.
         TypeLoadExceptionDemoClass.GenerateException();
      }  
      catch (TypeLoadException e) {
         Console.WriteLine("TypeLoadException:\n   {0}", e.Message);
      }
   }
}

class TypeLoadExceptionDemoClass
{ 
   public static bool GenerateException() 
   {
      // Throw a TypeLoadException with a custom defined message.
      throw new TypeLoadException("This is a custom TypeLoadException error message.");
   }
}
// The example displays the following output:
//       TypeLoadException:
//          This is a custom TypeLoadException error message.
Public Class Example
   Public Shared Sub Main()
      Try
         ' Call a method that throws an exception.
         TypeLoadExceptionDemoClass.GenerateException()
      Catch e As TypeLoadException
         Console.WriteLine("TypeLoadException:{0}   {1}", vbCrLf, e.Message)
      End Try
   End Sub 
End Class 

Class TypeLoadExceptionDemoClass
   Public Shared Function GenerateException() As Boolean
      ' Throw a TypeLoadException with a custom message.
      Throw New TypeLoadException("This is a custom TypeLoadException error message.")
   End Function 
End Class 
' The example displays the following output:
'       TypeLoadException:
'          This is a custom TypeLoadException error message.

Hinweise

Der Inhalt des message-Parameters sollte für den Benutzer verständlich sein.The content of the message parameter should be understandable to the user. Der Aufrufer dieses Konstruktors ist erforderlich, um sicherzustellen, dass diese Zeichenfolge für die aktuelle Systemkultur lokalisiert wurde.The caller of this constructor is required to ensure that this string has been localized for the current system culture.

In der folgenden Tabelle werden die anfänglichen Eigenschaftenwerte für eine TypeLoadException-Instanz aufgeführt.The following table shows the initial property values for an instance of TypeLoadException.

EigenschaftProperty WertValue
InnerException Ein NULL-Verweis (Nothing in Visual Basic).A null reference (Nothing in Visual Basic).
Message Die Zeichenfolge der Fehlermeldung.The error message string.

TypeLoadException(SerializationInfo, StreamingContext)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit serialisierten Daten.Initializes a new instance of the TypeLoadException class with serialized data.

protected:
 TypeLoadException(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);
protected TypeLoadException (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
new TypeLoadException : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> TypeLoadException
Protected Sub New (info As SerializationInfo, context As StreamingContext)

Parameter

info
SerializationInfo

Das Objekt, das die serialisierten Objektdaten enthält.The object that holds the serialized object data.

context
StreamingContext

Die Kontextinformationen zur Quelle oder zum Ziel.The contextual information about the source or destination.

Ausnahmen

Das info-Objekt ist null.The info object is null.

Beispiele

Im folgenden Beispiel wird eine Ausnahme generiert und die Ausnahme Daten in eine Datei serialisiert. Anschließend wird die Ausnahme wieder hergestellt.The following example generates an exception, and serializes the exception data to a file, and then reconstitutes the exception. Damit dieses Codebeispiel ausgeführt werden kann, müssen Sie den voll qualifizierten Assemblynamen angeben.For this code example to run, you must provide the fully qualified assembly name. Informationen zum Abrufen des voll qualifizierten Assemblynamens finden Sie unter Assemblynamen.For information about how to obtain the fully qualified assembly name, see Assembly Names.

#using <System.Runtime.Serialization.Formatters.Soap.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Soap;
using namespace System::IO;

// This class overrides the GetObjectData method and initializes
// its data with current time. 

[Serializable]
public ref class MyTypeLoadExceptionChild: public TypeLoadException
{
public:
   System::DateTime ErrorDateTime;
   MyTypeLoadExceptionChild()
   {
      ErrorDateTime = DateTime::Now;
   }

   MyTypeLoadExceptionChild( DateTime myDateTime )
   {
      ErrorDateTime = myDateTime;
   }


protected:
   MyTypeLoadExceptionChild( SerializationInfo^ sInfo, StreamingContext * sContext )
   {
      
      // Reconstitute the deserialized information into the instance.
      ErrorDateTime = sInfo->GetDateTime( "ErrorDate" );
   }


public:
   void GetObjectData( SerializationInfo^ sInfo, StreamingContext * sContext )
   {
      
      // Add a value to the Serialization information.
      sInfo->AddValue( "ErrorDate", ErrorDateTime );
   }

};

int main()
{
   
   // Load the mscorlib assembly and get a reference to it.
   // You must supply the fully qualified assembly name for mscorlib.dll here.
   Assembly^ myAssembly = Assembly::Load( "Assembly text name, Version, Culture, PublicKeyToken" );
   try
   {
      Console::WriteLine( "Attempting to load a type not present in the assembly 'mscorlib'" );
      
      // This loading of invalid type raises a TypeLoadException
      Type^ myType = myAssembly->GetType( "System::NonExistentType", true );
   }
   catch ( TypeLoadException^ ) 
   {
      
      // Serialize the exception to disk and reconstitute it back again.
      try
      {
         System::DateTime ErrorDatetime = DateTime::Now;
         Console::WriteLine( "A TypeLoadException has been raised." );
         
         // Create MyTypeLoadException instance with current time.
         MyTypeLoadExceptionChild^ myTypeLoadExceptionChild = gcnew MyTypeLoadExceptionChild( ErrorDatetime );
         IFormatter^ myFormatter = gcnew SoapFormatter;
         Stream^ myFileStream = gcnew FileStream( "typeload.xml",FileMode::Create,FileAccess::Write,FileShare::None );
         Console::WriteLine( "Serializing the TypeLoadException with DateTime as {0}", ErrorDatetime );
         
         // Serialize the MyTypeLoadException instance to a file.
         myFormatter->Serialize( myFileStream, myTypeLoadExceptionChild );
         myFileStream->Close();
         Console::WriteLine( "Deserializing the Exception." );
         myFileStream = gcnew FileStream( "typeload.xml",FileMode::Open,FileAccess::Read,FileShare::None );
         
         // Deserialize and reconstitute the instance from file.
         myTypeLoadExceptionChild = safe_cast<MyTypeLoadExceptionChild^>(myFormatter->Deserialize( myFileStream ));
         myFileStream->Close();
         Console::WriteLine( "Deserialized exception has ErrorDateTime = {0}", myTypeLoadExceptionChild->ErrorDateTime );
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "Exception : {0}", e->Message );
      }

   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0}", e->Message );
   }

}


using System;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap; 
using System.Security.Permissions;
using System.IO;

class GetObjectDataDemo
{
   public static void Main()
   {
      // Get a reference to the assembly mscorlib.dll, which is always
      // loaded. (System.String is defined in mscorlib.)
      Assembly mscorlib = typeof(string).Assembly;

      try
      {
         Console.WriteLine ("Attempting to load a type not present in the assembly 'mscorlib'");
         // This loading of invalid type raises a TypeLoadException
         Type myType = mscorlib.GetType("System.NonExistentType", true);
      }         
      catch (TypeLoadException)
      {
         // Serialize the exception to disk and reconstitute it.
         System.DateTime ErrorDatetime = DateTime.Now;
         Console.WriteLine("A TypeLoadException has been raised.");

         // Create MyTypeLoadException instance with current time.
         MyTypeLoadException myException = new MyTypeLoadException(ErrorDatetime);
         IFormatter myFormatter = new SoapFormatter();
         Stream myFileStream = new FileStream("typeload.xml", FileMode.Create, FileAccess.Write, FileShare.None);
         Console.WriteLine("Serializing the TypeLoadException with DateTime as " + ErrorDatetime);

         // Serialize the MyTypeLoadException instance to a file.
         myFormatter.Serialize(myFileStream, myException);
         myFileStream.Close();

         Console.WriteLine("Deserializing the Exception.");
         myFileStream = new FileStream("typeload.xml", FileMode.Open, FileAccess.Read, FileShare.None);

         // Deserialize and reconstitute the instance from file.
         myException = (MyTypeLoadException) myFormatter.Deserialize(myFileStream);
         myFileStream.Close();
         Console.WriteLine("Deserialized exception has ErrorDateTime = " + myException.ErrorDateTime);
      }
   }
}

// This class overrides the GetObjectData method and initializes
// its data with current time. 

[Serializable]
public class MyTypeLoadException : TypeLoadException 
{
   private System.DateTime _errorDateTime = DateTime.Now;
   public DateTime ErrorDateTime { get { return _errorDateTime; }}

   public MyTypeLoadException(DateTime myDateTime) 
   {
      _errorDateTime = myDateTime;
   }

   protected MyTypeLoadException(SerializationInfo sInfo, StreamingContext sContext) 
       : base(sInfo, sContext)
   {
      // Reconstitute the deserialized information into the instance.
      _errorDateTime = sInfo.GetDateTime("ErrorDate");
   }

   // GetObjectData overrides must always have a demand for SerializationFormatter.
   [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter=true)]
   public override void GetObjectData(SerializationInfo sInfo, StreamingContext sContext) 
   {
      base.GetObjectData(sInfo, sContext);
      // Add a value to the Serialization information.
      sInfo.AddValue("ErrorDate", ErrorDateTime);
   }
}
Imports System.Reflection
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Security.Permissions
Imports System.IO

Class GetObjectDataDemo

   Public Shared Sub Main()
      ' Get a reference to the assembly mscorlib.dll, which is always
      ' loaded. (System.String is defined in mscorlib.)
      Dim tString As Type = GetType(String)
      Dim mscorlib As [Assembly] = tString.Assembly

      Try
         Console.WriteLine("Attempting to load a type not present in the assembly 'mscorlib'")
         ' This loading of invalid type raises a TypeLoadException
         Dim myType As Type = mscorlib.GetType("System.NonExistentType", True)
      Catch
         ' Serialize the exception to disk and reconstitute it.
         Dim ErrorDatetime as System.DateTime = DateTime.Now
         Console.WriteLine("A TypeLoadException has been raised.")

         ' Create MyTypeLoadException instance with current time.
         Dim myException As new MyTypeLoadException(ErrorDatetime)
         Dim myFormatter as IFormatter  = new SoapFormatter()
         Dim myFileStream as Stream 
         myFileStream = New FileStream("typeload.xml", FileMode.Create, FileAccess.Write, FileShare.None)
         Console.WriteLine("Serializing the TypeLoadException with DateTime as " _
             & ErrorDatetime.ToString())

         ' Serialize the MyTypeLoadException instance to a file.
         myFormatter.Serialize(myFileStream, myException)
         myFileStream.Close()

         Console.WriteLine("Deserializing the Exception.")
         myFileStream = New FileStream("typeload.xml", FileMode.Open, FileAccess.Read, FileShare.None)

         ' Deserialize and reconstitute the instance from file.
         myException = CType(myFormatter.Deserialize(myFileStream), MyTypeLoadException)
         myFileStream.Close()
         Console.WriteLine("Deserialized exception has ErrorDateTime = " + myException.ErrorDateTime.ToString())
      End Try
   End Sub
End Class

' This class overrides the GetObjectData method and initializes
' its data with current time. 
<Serializable()> _
Public Class MyTypeLoadException
   Inherits TypeLoadException

   Private _errorDateTime As System.DateTime = DateTime.Now
   Public ReadOnly Property ErrorDateTime As DateTime
      Get
         Return _errorDateTime
      End Get
   End Property

   Public Sub New(myDateTime As DateTime)
      _errorDateTime = myDateTime
   End Sub

   Protected Sub New(sInfo As SerializationInfo, sContext As StreamingContext)
      MyBase.New(sInfo, sContext)
      ' Reconstitute the deserialized information into the instance.
      _errorDateTime = sInfo.GetDateTime("ErrorDate")
   End Sub

   ' GetObjectData overrides must always have a demand for SerializationFormatter.
   <SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=true)> _
   Public Overrides Sub GetObjectData(sInfo As SerializationInfo, sContext As StreamingContext)
      MyBase.GetObjectData(sInfo, sContext)
      ' Add a value to the Serialization information.
      sInfo.AddValue("ErrorDate", ErrorDateTime)
   End Sub

End Class

Hinweise

Dieser Konstruktor wird während der Deserialisierung aufgerufen, um das über einen Datenstrom übertragene Ausnahmeobjekt wieder zusammenzusetzen.This constructor is called during deserialization to reconstitute the exception object transmitted over a stream. Weitere Informationen finden Sie unter XML- und SOAP-Serialisierung.For more information, see XML and SOAP Serialization.

Siehe auch

TypeLoadException(String, Exception)

Initialisiert eine neue Instanz der TypeLoadException-Klasse mit einer angegebenen Fehlermeldung und einem Verweis auf die innere Ausnahme, die diese Ausnahme ausgelöst hat.Initializes a new instance of the TypeLoadException class with a specified error message and a reference to the inner exception that is the cause of this exception.

public:
 TypeLoadException(System::String ^ message, Exception ^ inner);
public TypeLoadException (string message, Exception inner);
new TypeLoadException : string * Exception -> TypeLoadException
Public Sub New (message As String, inner As Exception)

Parameter

message
String

Die Fehlermeldung, in der die Ursache der Ausnahme erklärt wird.The error message that explains the reason for the exception.

inner
Exception

Die Ausnahme, die die Ursache der aktuellen Ausnahme ist.The exception that is the cause of the current exception. Wenn der inner-Parameter nicht null ist, wird die aktuelle Ausnahme in einem catch-Block ausgelöst, der die innere Ausnahme behandelt.If the inner parameter is not null, the current exception is raised in a catch block that handles the inner exception.

Beispiele

Im folgenden Codebeispiel wird der TypeLoadException(String, Exception)-Konstruktor veranschaulicht.The following code example demonstrates the TypeLoadException(String, Exception) constructor. Sie enthält eine Methode, die eine TypeLoadExceptiongeneriert, diese Ausnahme abfängt und eine neue TypeLoadException mit einer benutzerdefinierten Meldung, einschließlich der ursprünglichen TypeLoadException als innere Ausnahme, auslöst.It contains a method that generates a TypeLoadException, catches that exception, and throws a new TypeLoadException with a custom message, including the original TypeLoadException as the inner exception.

using namespace System;
using namespace System::Runtime::InteropServices;
ref class TypeLoadExceptionDemoClass
{
public:

   // A call to this method will raise a TypeLoadException.

   [DllImport("NonExistentDLL.DLL",EntryPoint="MethodNotExists")]
   static void NonExistentMethod();
   static void GenerateException()
   {
      try
      {
         NonExistentMethod();
      }
      catch ( TypeLoadException^ e ) 
      {
         
         // Rethrow exception with the exception as inner exception
         throw gcnew TypeLoadException( "This exception was raised due to a call to an invalid method.",e );
      }

   }

};

int main()
{
   Console::WriteLine( "Calling a method in a non-existent DLL which triggers a TypeLoadException." );
   try
   {
      TypeLoadExceptionDemoClass::GenerateException();
   }
   catch ( TypeLoadException^ e ) 
   {
      Console::WriteLine( "TypeLoadException: \n\tError Message = {0}", e->Message );
      Console::WriteLine( "TypeLoadException: \n\tInnerException Message = {0}", e->InnerException->Message );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: \n\tError Message = {0}", e->Message );
   }

}


using System;
using System.Runtime.InteropServices;

public class TypeLoadException_Constructor3
{
   public static void Main() 
   {
      Console.WriteLine("Calling a method in a non-existent DLL which triggers a TypeLoadException.");
      try 
      {
         TypeLoadExceptionDemoClass.GenerateException();
      }  
      catch (TypeLoadException e)
      {
         Console.WriteLine ("TypeLoadException: \n\tError Message = " + e.Message);
         Console.WriteLine ("TypeLoadException: \n\tInnerException Message = " + e.InnerException.Message );
      }  
      catch (Exception e)
      {
         Console.WriteLine ("Exception: \n\tError Message = " + e.Message);
      }
   }
}

class TypeLoadExceptionDemoClass
{ 
   // A call to this method will raise a TypeLoadException.
   [DllImport("NonExistentDLL.DLL", EntryPoint="MethodNotExists")]
   public static extern void NonExistentMethod();

   public static void GenerateException() 
   {
      try 
      {
         NonExistentMethod();
      }
      catch (TypeLoadException e) 
      {
         // Rethrow exception with the exception as inner exception
         throw new TypeLoadException("This exception was raised due to a call to an invalid method.", e);
      }
   }
}
Imports System.Runtime.InteropServices

Public Class TypeLoadException_Constructor3
   Public Shared Sub Main()
      Console.WriteLine("Calling a method in a non-existent DLL which triggers a TypeLoadException.")
      Try
         TypeLoadExceptionDemoClass.GenerateException()
      Catch e As TypeLoadException
         Console.WriteLine(("TypeLoadException: " + ControlChars.Cr + ControlChars.Tab + "Error Message = " + e.Message))
         Console.WriteLine(("TypeLoadException: " + ControlChars.Cr + ControlChars.Tab + "InnerException Message = " + e.InnerException.Message))
      Catch e As Exception
         Console.WriteLine(("Exception: " + ControlChars.Cr + ControlChars.Tab + "Error Message = " + e.Message))
      End Try
   End Sub
End Class

Class TypeLoadExceptionDemoClass
   ' A call to this method will raise a TypeLoadException.
   Public Declare Sub NonExistentMethod Lib "NonExistentDLL.DLL" Alias "MethodNotExists" ()

   Public Shared Sub GenerateException()
      Try
         NonExistentMethod()
      Catch e As TypeLoadException
         ' Rethrow exception with the exception as inner exception
         Throw New TypeLoadException("This exception was raised due to a call to an invalid method.", e)
      End Try
   End Sub
End Class

Hinweise

Eine Ausnahme, die als direktes Ergebnis einer vorhergehenden Ausnahme ausgelöst wird, kann in der InnerException-Eigenschaft über einen Verweis auf die vorhergehende Ausnahme verfügen.An exception that is thrown as a direct result of a previous exception can include a reference to the previous exception in the InnerException property. Die InnerException-Eigenschaft gibt den gleichen Wert zurück, der an den Konstruktor übergeben wird, oder null, wenn die InnerException-Eigenschaft den Wert der inneren Ausnahme nicht an den Konstruktor übergibt.The InnerException property returns the same value that is passed into the constructor, or null if the InnerException property does not supply the inner exception value to the constructor.

In der folgenden Tabelle werden die anfänglichen Eigenschaftenwerte für eine TypeLoadException-Instanz aufgeführt.The following table shows the initial property values for an instance of TypeLoadException.

EigenschaftProperty WertValue
InnerException Der Verweis auf die interne Ausnahme.The inner exception reference.
Message Die Zeichenfolge der Fehlermeldung.The error message string.

Siehe auch

Gilt für: