问题描述
我要做什么:
USING class.Bar.
CLASS class.Foo SERIALIZABLE INHERITS Progress.Lang.Object:
DEFINE PRIVATE VARIABLE cRrk_ID AS CHaraCTER NO-UNDO.
CONSTRUCTOR PUBLIC Foo(INPUT objBar AS Bar):
THIS-OBJECT:cRrk_ID = objBar:getRrk_ID(). //Runtime Error: Invalid Handle (3135)
END.
END.
CLASS class.Bar SERIALIZABLE INHERITS Progress.Lang.Object:
DEFINE PRIVATE VARIABLE cRrk_ID AS CHaraCTER NO-UNDO.
CONSTRUCTOR PUBLIC Bar(INPUT pcRrk_ID AS CHaraCTER):
THIS-OBJECT:cRrk_ID = pcRrk_ID.
END.
METHOD PUBLIC CHaraCTER getRrk_ID():
RETURN THIS-OBJECT:cRrk_ID.
END METHOD.
END.
有人可以解释为什么我不能使用对象的方法作为参数吗?
解决方法
您需要新建类。在类中先放置Foo的构造函数。
CONSTRUCTOR PUBLIC Foo(INPUT objBar AS Bar):
objBar = NEW class.Bar () .
THIS-OBJECT:cRrk_ID = objBar:getRrk_ID(). //Runtime Error: Invalid Handle (3135)
END.
,
您可以使用但创建Bar对象并发送给Foo的构造函数:
DEFINE VARIABLE objBar AS "class.Bar" NO-UNDO.
objBar = NEW "class.Bar"("hi").
DEF VARIABLE objFoo AS "class.Foo" NO-UNDO.
objFoo = NEW "class.Foo"(objBar).