求助：建子vi中的属性节点问题

[abczhwsdust]

我需要建一个子vi，但vi中有可见和位置的属性节点，生成子vi后,原来的属性节点都不起作用，请问有什么方法

如图，原来要实现的功能是让布尔和布尔2重合，随输入数值确定是否可见，但生成子vi后，就不能实现这些功能了，路过的大神指教一下

[csxcs_366]

从图上分析，似乎是要在子VI中，利用属性节点修改主VI中的控件属性，那这样做是无法实现的。

子VI修改主VI中的控件，不能直接采用数据流方式，应该传入控件的引用到子VI中。这类似于C语言中的指针传递和值传递之间的区别。

[abczhwsdust]

哎，谢谢了，看来只能一个一个的重复写了，

[abczhwsdust]

呵呵，再问你个问题，在vi中利用用颜色属性节点，是布尔在case不同的情况下显示不同的颜色，可是我把布尔控件自定义后，改成了其他的形状，颜色就不改变了，应该怎么解决呢

[ian_fung · Accepted solution]

Please also see this similar post 顶层界面如何与子VI的数据实现同步显示。

The example uses Refnum (Reference) for updating caller's control/ indicator with sub-VI's data at runtime.

[abczhwsdust]

Thanks for your answer to my question. I have solved the question. However, I 遇到这样一个情况

第一个是直接调用的引用句柄函数（refnum），第二个是使用右键->创建->属性节点->引用实现的，结果，第一个就没问题，第二个就报错，

[abczhwsdust]

Please Take a look at this post.

http://forums.ni.com/t5/NI-LabVIEW-CVI-%E6%95%B0%E6%8D%AE%E9%87%87%E9%9B%86%E7%AD%89%E4%BA%A7%E5%93%...

[ian_fung]

Hi, sorry for late reply as I was out of town...

And, I believe that csxsc already replied to your question here

Why do you need the second version?

[abczhwsdust]

thank you all the same. The question was come across in the process that I design my program according to your method. I found that the first version was  right but the second wrong. So I don't know the difference between them. Now I have known.

However ,another problem appears. Please look at the three following picture. The first is your example ,and the second is my own design.The third is my sub_vi.我的程序出现了强制类型转换。我查到，为了优化程序，程序中应该尽量避免转换。

        

[ian_fung]

Without looking at your sub VI, one quick way to fix this is...

From the Booleans' references, right-click and create (Reference) Controls. Copy and paste these (Reference) Controls to your sub VI, and use them as Inputs to your sub VI.