Question

public interface IBase { }

public class Base<T> : IBase
{
    public static string GenericName { get { return typeof( T ).Name; } }
}

public class A : Base<int> { }
public class B : Base<float> { }
public class C : Base<string> { }

class Program
{
    static void Main( string[] args )
    {
        Type findType = typeof( IBase );
        Type[] types = ( from domainAssembly in AppDomain.CurrentDomain.GetAssemblies()
                         from assemblyType in domainAssembly.GetTypes()
                         where findType.IsAssignableFrom( assemblyType )
                         select assemblyType ).ToArray();

        // i = 2 is class A
        for( int i = 2; i < types.Length; i++ )
        {
            Type type = types[i];
            PropertyInfo propertyInfo = type.GetProperty( "GenericName", BindingFlags.Public | BindingFlags.Static );

            if( null != propertyInfo ) // propertyInfo is NULL!
            {
                string getType = (string)propertyInfo.GetValue( null, null );
            }
        }
    }
}

我们已经实现了GetType of Base来检查A，B，C的类型，但我们无法调用它。为什么GetProperty的结果为null？这些问题有没有解决方案？

Answer 1

  static void Main(string[] args)
        {
            Type findType = typeof(IBase);
            Type[] types = (from domainAssembly in AppDomain.CurrentDomain.GetAssemblies()
                            from assemblyType in domainAssembly.GetTypes()
                            where findType.IsAssignableFrom(assemblyType)
                            select assemblyType).ToArray();

            for (int i = 0; i < types.Length; i++)
            {
                PropertyInfo propertyInfo = types[i].GetProperty("GetType",  BindingFlags.Static| BindingFlags.FlattenHierarchy| BindingFlags.Public);

                if (null != propertyInfo) // propertyInfo is NULL!
                {
                    string getType = (string)propertyInfo.GetValue(null, null);
                }
            }
        }

C＃GetProperty不起作用

1 个答案: