GetParameter ( ParameterName )

Version 2


    Custom Function


    Mac OS X, Windows
    Daniel Kaan
    FMP 8, 8.5, 9, 10, 11
    Data Organisation Pty Ltd
    Web: Yes
    File Type: None
    Server: Yes
    FileSize: 0 kilobytes


    FileMaker scripts allow only the passing of single script parameter. This function allows you to pass multiple scrip parameters which are named and then retrieve them by name in the script to which the parameter was passed.




    This custom function "GetParameter ( ParameterName )" is used to unpack a single named parameter from a list passed to the current script as a script parameter.


    The script parameter should be a return ("¶") or pipe (”|”) delimited list of the form:







    For example the following list might be passed as a Script Parameter as follows

    Perform Script ( "Create Contact" ; Parameter: ""FirstName=Daniel" & "¶" & "LastName=Kaan"" )


    In the "Create Contact" script, the multiple parameters that were passed can now be referened by name

    Go to Layout ("Contacts")

    New Record/Request

    Set Field ( Contacts::First Name ; GetParameter ( "FirstName" ) )

    Set Field ( Contacts::Last Name ; GetParameter ( "LastName" ) )


    If a parameter is called for that was not passed (eg: GetParameter ( "ShoeSize" ), an empty string is returned.


    Because ¶ characters are used to delimit parameters, values containing ¶ characters are returned only with the characters up to, but not inclucing the first ¶ character. If you need to pass parameters which contain ¶ characters, you should use the pipe “|” character as a delimiter instead. The pipe character is reserved even if you use the ¶ for a delimiter, because if the function finds a pipe anywhere in the parameter, it will use the pipe as the delimiter rather than the ¶.


    Spaced either side of the “=” sign are optional


    Daniel Kaan, Sydney, Australia Tuesday, 3 October 2006





    delimiter = Case(PatternCount ( Get ( ScriptParameter ) ; "|" );"|";"¶");

    ListOfParameters = delimiter & Get ( ScriptParameter ) & delimiter;

    linestart = Position ( ListOfParameters ; delimiter & ParameterName ; 1 ; 1 ) + 1;

    paramstart = Position ( ListOfParameters ; "=" ; linestart ; 1 ) + 1;

    paramend = Position ( ListOfParameters ; delimiter ; linestart ; 1 ) - 1;

    paremlength = paramend - paramstart + 1;

    ValueOfParameter = Middle ( ListOfParameters ; paramstart ; paremlength);

    ValueOfParameter = Trim(ValueOfParameter)







    Sample Input

    Sample Output
    GetParameter ( “FirstName” )


    Developer's Notes



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