PDF filename - can be dynamic?

with the PDF API and a custom button you can:

https://xlinesoft.com/phprunner/docs/pdf_parameters.htm

Document appearance options

filename {string}

Sets the PDF file name. Default value: 'file.pdf'.

Yes, use PDF API for this purpose.

I created custom button and added below code but no luck. Please help me where I've done mistake?

Client before:
var params = {
table: 'bills',
page: 'print',
pageType: 'print',
selection: pageObj.getSelectedRecordKeys()
}
Runner.PDF.download( params, {bill_id}, pageObj );

I don´t see the

filename {string}

parameter in your code

I inserted custom button in the grid (list page) and code as below. Now, I can get the file name correctly from the field I choose, but one problem appeared, that is it downloads all the data and not just one. How can I get this fixed? please help.

Preview:

Custom Buttom: Client Before:

var ctrlID = row.getFieldValue("id");
var ctrlINV = row.getFieldValue("inv_no");

var params = {
selection: ctrlID
}
Runner.PDF.download( params, ctrlINV, pageObj );