Excel Service With info path

Question

hello every body ,
i have a vacation list in sharepoint 2013   i need to calculate the difference between start date and end date excluding the
holidays but no such a way to do it in infopath list so i found an article to use an excel service instead with networkholiday function as follows in this link
http://www.bizsupportonline.net/infopath2007/calculate-date-difference-infopath-rules-excel-services.htm
i followed the step by step but i got the below error every time i try opening the Excel feel via info path to send dates to it
"The query cannot be run for the following DataObject: OpenWorkbook
InfoPath cannot run the specified query.
The SOAP response indicates that an error occurred on the server:
This workbook cannot be opened because it is not stored in a trusted location."
and i have added the library which contains the pubished excel file to trusted location ..thank you 

Answer 1

Hi,
With
Calculated Formula, here is a similar thread about calculating the difference between start date and end date excluding weekends for your reference:
http://social.technet.microsoft.com/Forums/en-US/e97579f0-7f55-4263-b064-de36dc594d6e/number-of-days-between-to-dates-excluding-weekends-help-with-existing-formula?forum=sharepointgeneralprevious
More details about this formula can be found in the article below:
http://social.technet.microsoft.com/Forums/en-US/f978790b-af9f-4238-b64f-c6e2b8a24dbc/forum-faq-using-calculated-column-to-calculate-days-between-two-dates-excluding-weekends?forum=sharepointgeneral
Or we can do it via
JavaScript.
Here is a thread with code demos:
http://stackoverflow.com/questions/3464268/find-day-difference-between-two-dates-excluding-weekend-days
If you need to exclude some specific holidays, it is recommended to create an Event Receiver for this list and do the calculation in this Event Receiver.
You can take a look at the two links below about
Counting Calendar dates by excluding Holidays or Weekends using C#:
http://www.c-sharpcorner.com/UploadFile/tirthacs/difference-between-two-dates-excluding-weekends/
http://revdoniv.wordpress.com/2010/09/29/counting-calendar-dates-by-excluding-holidays-or-weekends/
Here is a step by step sample on creating a simple Item added
event receiver for Custom List in SharePoint 2010:
http://msdn.microsoft.com/en-us/library/ff398052.aspx
More information on Event Receiver for your reference:
http://msdn.microsoft.com/en-us/library/gg749858(v=office.14).aspx
http://msdn.microsoft.com/en-us/library/ff408183(v=office.14).aspx
Best regards
Patrick Liang
TechNet Community Support