C# TypeLoadException構造函數代碼示例

//引入命名空間
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.");
   }
}

//引入命名空間
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);
   }
}

//引入命名空間
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);
      }
   }
}