小编Cyb*_*TYK的帖子

在运行时,我收到以下错误

"对象必须实现IConvertible"

调用功能

lboxBuildingType.SelectedIndex = pharse.returning<int>xdoc.Root.Element("BuildingTypeIndex").Value);

public static T returning<T>(object o)
{
       Tuple<bool, T, object> tmp;
       switch (Type.GetTypeCode(typeof(T)))
       {
        ////blah blah blah
           case TypeCode.Int32:
              tmp= (Tuple<bool,T,object>)Convert.ChangeType(I(o.ToString())), typeof(T)); // error
              break;
        ////blah blah blah
       }
}

private static Tuple<bool, Int32, Object> I(object o)
{
      int i;
      bool b;
      Int32.TryParse(o.ToString(), out i);
      b = (i == 0);
      return new Tuple<bool, Int32, object>(b, i, o);
}

码的目的是在通过<T>("15")并使其产生tuple<Bool,T,object>这将是tuple<true, 15, "15">

它出错了我用//错误标记的地方