Optional parameters in functions

Tbi

Hi

I'm writing some codeunits, and tries to find out how to make a function with optional parameter(s).
Is this possible, and if, how?

kine

I think, that it is no possible to have function with variable count of parameters. No way how to do that. No way to set default value for some parameter, no way how to define more functions with same name but another parameter count.

But> one place where are functions with variable count of parameters exist> automations.... if you look to some code with automations, there are used many functions with default parameters...

PEzechiels

example:
define the following variables:

Name Type
ParameterInput Dialog
Parameter1 Integer
Parameter2 Integer
Parameter3 Integer

Text Constant:
Name ConstValue
Text1000000003 Please Specify the parameters\Parameter1 #1#######\Parameter2 #2#######\Parameter3 #3#######

On top of your script place this code

ParameterInput.OPEN(Text1000000003)
ParameterInput.INPUT(1,Parameter1);
ParameterInput.INPUT(2,Parameter2);
ParameterInput.INPUT(3,Parameter3);
ParameterInput.CLOSE;


and then ofcourse the usual
Rec.setfilter(field1,parameter1);
Rec.setfilter(field2,Parameter2);
Rec.setfilter(field3,Parameter3);
etc etc.
and now you have your parameters.
If you want the window to open optionally you should place a condition before executing the above script;

Hope this helps

Tbi

Thanks.
I cannot use dialog (i shall use this codeunit within NAS so userinput is impossible). Optional parameters would have been 'nice to have', but I will find a way around..

- T.

kine

One way around is array of variant type variable and count of params in array passed into function... but no automatic type control etc...

Polar

what's a problem?

Function(Param1,...,Var OptionParameter:option);

and return value into OptionParameter.

kine

Polar wrote:

what's a problem?

Function(Param1,...,Var OptionParameter:option);

and return value into OptionParameter.

Problem is how to create function with same name with possibility to fill only some parameters (something as default parameters in C etc.)

Definition:
Function F(Param1,Param2,Param3);

have possibility to call as:

F(p1);
F(p1,p2);
F(p1,p2,p3);

something as calling MESSAGE(Text000), or MESSAGE(Text000,P1) etc...
[/code]

Polar

kine, have you already solved a problem?

Unfortunatly, Navision is not object-oriented programming , but only based on it. :?

dufour

A working solution, but, it's .. not the best

Create a table, the fields are possible parameters (so you can have corrcet format)
On this table, you set a unique ID for each row.
When you call your function, you write the rox with your parameters, and give the unique ID to your function.
Your function retrieve row parameters (with ID) and work

...

I think it's the "best" solution with Navision

Polar

I do love Navision,
Where with little exertion
And with extra-vision
You find through-ass solution.
:P