problem with appended path

[RayFarmer]

Hi,

I using LabVIEW 7.1, but the same is for LabVIEW 7.0.

Should this be happening, I am just appending a string containing a filename to a path but sometime my path control contains an empty path. If it is, then I get "filename.ext:\" as seen in picture?

Its easily solvable, but I wasn't expecting this to happen.

Regards

Ray Farmer

<img src="http://forums.ni.com/attachments/ni/170/140979/1/appended_path.PNG">

Message Edited by Ray Farmer on 09-05-2005 08:31 PM

Message Edited by Ray Farmer on 09-05-2005 08:32 PM

Message Edited by Ray Farmer on 09-05-2005 08:33 PM

[JeanPierre]

That is because filename.txt as root of an absolute path is supposed to be a drive and it is formatted accordingly: <drive>:\ .
What behavior did you expect?

[chilly_charly]

Ray, everything is explained in the online help 😉

To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses. :D:D:D

To be honnest, I ignored that until you asked... 🙂

Message Edité par chilly charly le 09-05-2005 09:57 PM

[tst]

The reason appears to be fairly simple - if the path is empty, the string is treated as the beginning of the path, and as such receives the 😕 of the drive letters (like c:\), which does make sense.

As to whether this should be so or should LV detect the fact that the path is empty and use a default (let's say the root directory of the current drive), I don't know.

[RayFarmer]

Has anyone got 6.1 installed and can give it a go for me.

Regards

Ray

[chilly_charly]

Exactly same behaviour using 6.1

[xseadog]

Hi Ray
humm -same problem
Investigating further (check labview help for build path)
It states 
            *If base path is an empty path and name or relative path is an absolute path, this function sets appended path to the absolute path in name or relative path.

If base path is empty and you set name or relative path to: c:\d\error.log
then appended path becomes c:\d\error.log

not setting absolut path 'corrupts' result ie error.logC:\
As you say very easy solved with case selector controlled by string length check =0

chow
xseadog

[RayFarmer]

Hi,

I was expecting my filename or my relative path.

If my base path is empty and my string is a relative path then I should see a relative path!!!!

Ray

[xseadog]

Humm
offline to long

chow
xseadog

[RayFarmer]

Guys,

Thanks for for your input.

Hi CC,

I'm not a novice with labview, just been doing more 'C' than labVIEW the last year.

The links may help, as I was thinking about doing the CPD exam to reactivate it.

Regards

Ray