ch6_5.cs

《c#技术内幕代码》

using System;
using System.Reflection;
using System.Collections;

class CH6_5
{
   public static void Main(string[] args)
   {
      // If they gave us at least two arguments,
      // check the assembly (arg 1) for a class
      // that is derived from another class (arg 2)
      if ( args.Length >= 2 )
         CheckBaseClass( args[0], args[1] );
   }
   public static void CheckBaseClass( 
       string AssemblyName,
       string ClassName )
   {
      // Step 1: Open the assembly
      Assembly assembly = Assembly.LoadFrom( 
                AssemblyName );
      if ( assembly == null )
      {
         Console.WriteLine("Unable to open {0}",
	    AssemblyName );
	 return;
      }
      
      // Step 2: Loop through all classes in 
      //         the assembly
      
      foreach ( Type t in assembly.GetTypes() )
      {
         // Is this a class?
	 if ( t.IsClass == false )
	    continue; // No. Skip it
			
         // Check all of the base classes for this class, as well as 
	 // their base classes
 	 Type baseType = t.BaseType;
         while (baseType != null)
	 {
	     if ( baseType.FullName.EndsWith(ClassName) )
             {
	        Console.WriteLine("Class {0} is derived from {1}",
		   t.FullName, ClassName );
 	     }																		
	     baseType = baseType.BaseType;
         }

         // Check if one of the types' interfaces is the type we're looking for
	 Type[] intfc = t.GetInterfaces();
         foreach (Type itf in intfc)
         {
            if ( itf.FullName.EndsWith(ClassName) )
            {
	        Console.WriteLine("Class {0} is derived from intf {1}",
		   t.FullName, ClassName );
            }																		
         }
      }
   }
}