Question
Wesley West · Jun 2

Reading a CSV file into a Variable

Hello!  I need help reading a file and putting the contents into variables.

File path would be, c:\temp\zipcitystate.csv or txt

Data looks like this

00501,Holtsville,NY
00544,Holtsville,NY
00601,Adjuntas,PR
00602,Aguada,PR

I need to add the first area to variable ZIP, Second to CITY and third to STATE. they are separated by a comma.

 

Any help would be appreciated 

Product version: Caché 2017.1
$ZV: 2017.1.0.792.0
0
0 191
Discussion (8)1
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Once you copy them to a variable - then what?  Global variable?  Depending on what you want to do with the info, I'd create a RecordMap to read the file....need more information to really say.

Yea, I'll be updating a global with the data which I know how to do, just struggling to get the info from the file.

Then I suggest creating a recordMap for the file layout, then use the EnsLib.RecordMap.Service.BatchFileService (or similar) class to read the file.

A simple method like


ClassMethod ProcData(file = "c:\temp\zipcitystate.csv")
{
    set str=##class(%Stream.FileCharacter).%New()
    do str.LinkToFile(file)
    while 'str.AtEnd {
        set $listbuild(ZIP,CITY,STATE)=$listfromstring(str.ReadLine())
        
        // now you have the individual columns
        // in ZIP, CITY and STATE variables for further processing
        write "Zip=",ZIP,?12,"City=",CITY,?40,"State=",STATE,!
    }
    
    // depending on the way of your implementation, a "kill str"
    // would be needed to free up the file
    kill str
}

to do the job. Then call the method as

do ##class(your.class).ProcData()
// or
do ##class(your.class).ProcData("path-to-the-file")

Does this matter if the routine is a object script routine? I have tried a lot of stuff and I keep getting various errors. 

Julius I tired your code but it's failing on the first line.

Any help would be appreciated 

As an ObjectScript routine, remove the "ClassMethod" keyword (which, as the name indicates, belongs to classes. Then either  add a "Public" keyword or you remove the brackets ("{", "}") too, but then all variables will have the same scope:

ProcData(file = "c:\temp\zipcitystate.csv") Public
{
    set str=##class(%Stream.FileCharacter).%New()
    do str.LinkToFile(file)
    while 'str.AtEnd {
        set $listbuild(ZIP,CITY,STATE)=$listfromstring(str.ReadLine())
        
        // now you have the individual columns
        // in ZIP, CITY and STATE variables for further processing
        write "Zip=",ZIP,?12,"City=",CITY,?40,"State=",STATE,!
    }
    
    // depending on the way of your implementation, a "kill str"
    // would be needed to free up the file
    kill str
}

Oh, and to invoke the above procedure just do a:

do ProcData^YourRoutineName()
// or
do ProcData^YourRoutineName("path-to-file")

That worked! Thank you very much!