ImageLoad not working in loop

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Hello:

more and more questions are arising ...

Variable refNum
Variable i
String fileFilterStr = "Images (*.jpg):.jpg, .jpeg;"

Open /D /R /F=fileFilterStr /MULT=1 refNum

for(i=0; i<ItemsInList(S_fileName, "\r"); i=i+1)
    Print(StringFromList(i, S_fileName, "\r"))
    ImageLoad /Q /T=jpeg (StringFromList(i, S_fileName, "\r"))
endfor

I'm trying to load a series of jpeg images. Therefor I call the Open-function (with /MULT=1) and get a string with all selected file names, separated by "\r". I split up this string using the function above and try to load all image into waves, named like the files.

If I comment out the ImageLoad call, the script goes through all names in the S_fileName and print it properly. If I "comment in" the ImageLoad call it just does the first image and then quits or opens the open dialogue like no file name is provided.

What am I doing wrong?

Thanks for your help,
Axel.

The problem is that ImageLoad sets S_fileName. It is a good idea to copy output variables such as S_fileName to local variables immediately after calling an operation. For example:

Function Test()
    Variable refNum
    Variable i
    String fileFilterStr = "Images (*.jpg):.jpg, .jpeg;"

    Open /D /R /F=fileFilterStr /MULT=1 refNum
    String filePathList = S_fileName
   
    Variable numItems = ItemsInList(filePathList, "\r")
    for(i=0; i<numItems; i=i+1)
        String filePath = StringFromList(i, filePathList, "\r")
        Print i, filePath
        ImageLoad /Q /T=jpeg filePath
    endfor
End

I also recommend using local variables such as "filePath" above as it makes it easier to debug code. You can see the value of filePath in the debugger but you can not see the value of StringFromList(i, filePathList, "\r") in the debugger.

 

July 30, 2018 at 05:13 am - Permalink