How do I set a ring enum to the first item, regardless of its value

[JasonWB]

Hi everyone,

I am trying to set a ring enum to the first value.  During run-time, I dynamically update the entries in a ring so I don't know the strings or the values ahead of time.  How do I force the ring to select the first element, which may have a value of '3', for example?

Thanks,

Jason

[shoneill]

You mean a text ring or an enum?

As far as I know enums always go from 0 to n-1, so the first element is always 0.

With a text ring, you can use a property node to get "data range.minimum" and set the ring to this value.

Hope this helps

Shane.

[JasonWB]

I tried playing around with that and it didn't yield the right result.  BTW, I am working with a text ring.  The data range.minimum is the minimum allowable in the properties sedtion - not the value of the first entry.  I did find out the only way to get that is to use "strings and values", extract the first element, and then choose the "value" field.

Thanks!

Jason

[chilly_charly]

Here is a solution. But... shhhttt... don't publish it, it's an NI secret !

Message Edité par chilly charly le 03-23-200606:55 PM

[JasonWB]

Yeah, nice and simple!  For some reason, under LabView 8.0, there is now property called "Values",  Only "strings and values".

Jason

[chilly_charly]

How surprizing ! Here is a LV 8.0 version. As you can see, the "Values" property exists ! 😉 :D:D:D

[chilly_charly]

Sorry, just mixed up everything. Here is the right file

[shoneill]

I don't have the Values (OR strings and values) property in LV 6.1, and to be honest, I can't see a way of doing this in LV 6.1.

Someone tell me I'm being slow today.

Shane.

[tst]

As CC said, although not in so many words, the Values[] property is a private property. The Strings and Values[] property isn't, but if it did exist in 6.1, it probably was private. You might be able to extract the enum data from its type descriptor or maybe by flattening it to a string. I would look at the OpenG data manipulation VIs.

[shoneill]

Wow, it's kind of extreme having to dig up the TD to do something like this.

Hmm.  The reasons to upgrade are increasing.

Shane.