Challenge #2 - Solution - GetPropValue

BindingExtensions.cs

  public static object GetPropValue(this object obj, string name)
  {
      if (obj == null) 
      { 
        return null; 
      }
      
      foreach (string part in name.Split('.'))
      {
          if (obj.IsNonStringEnumerable())
          {
              var toEnumerable = (IEnumerable)obj;
              var iterator = toEnumerable.GetEnumerator();
              if (!iterator.MoveNext())
              {
                  return null;
              }
              obj = iterator.Current;
          }
          Type type = obj.GetType();
          PropertyInfo info = type.GetProperty(part);
          if (info == null) { return null; }

          obj = info.GetValue(obj, null);
      }
      
      return obj;
  }

  private static bool IsNonStringEnumerable(this object instance)
  {
      return instance != null && instance.GetType().IsNonStringEnumerable();
  }

  private static bool IsNonStringEnumerable(this Type type)
  {
      if (type == null || type == typeof(string))
          return false;
      return typeof(IEnumerable).IsAssignableFrom(type);
  }