Nora Hutchison · Oct 14, 2020

ObjectScript - Appending to a file from another

–  I want to “copy” a file to another, appending if the file already exists. The below code works, except it overwrites the new file, rather than append.  The documentation says CopyFile will append


//Both files exists, so we can combine them
                 set tsc=##class(%File).CopyFile("D:\Files\Out\Vigilanz\AD_Lawson10132020.txt","D:\Files\Out\Vigilanz\employee10132020.txt"
                                if $$$ISOK(tsc)
                                !, "SQL file copied"
                                Quit $$$ERROR($$$GeneralError,"SQL file not copied: "_SQLFileDate_" to "_EmployeeFile)


Thanks, Nora

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Discussion (2)2
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Hi Nora! Long time laugh

Something like this should do the trick, assuming the file to be appended to is named "spoo.txt" and the file from which you're appending is named "fleem.txt":

    Set tOut = ##class(%File).%New()
    Set tIn = ##class(%File).%New()
    Set tSC = 1
    Set tOut.Name = "spoo.txt"
    Set tIn.Name = "fleem.txt"
    Set sc = tOut.Open("WA")
    Set:$$$ISERR(sc) tSC=$$$ADDSC(tSC,sc)
    Set sc = tIn.Open()
    Set:$$$ISERR(sc) tSC=$$$ADDSC(tSC,sc)
    Quit:$$$ISERR(tSC) tSC
    While 'tIn.AtEnd
        Set sc=tOut.Write(tIn.Read())
        Return:$$$ISERR(sc) sc
    Do tIn.Close()
    Do tOut.Close()
    Return $$$OK