I have created a infopath form like below

START DATE :

Happens Every: textbox drop down Weeks (Mon,thue,---sun)

Due Date :

Now when the user selects Start date as 7/1/2013, In the text box if he gives 3 and from drop down he selects Thuesday.

Now in Due Date it should display Next week Monday date i.e (7/8/2013).

Similarly for Months. Can you please help me with a fromule in infopath form

Attached is the image of my form. please help me it is urgent

Hello,

InfoPath does not handle date calculations well. Other than the out of the box AddDate() function, there is no easy way to calculate a date. 

You would need custom code for that functionality.

cheers,

Hi Teylyn,

Thanks for your reply. Can you please help me to achieve the same .. A hello world example is also ok

Sorry, I don't do code. 

I Have written a c# code but how can i use it in List infopath form.

In Sharepoint LIST infopath i could not get the code editor.

 public  String GetNthWeekdayOfMonth(DateTime EnteredDate, int Number, DayOfWeek weekday)
        {
            String error = "";

            var days = Enumerable.Range(1, DateTime.DaysInMonth(EnteredDate.Year, EnteredDate.Month)).Select(day => new DateTime(EnteredDate.Year, EnteredDate.Month, day));

            var weekdays = from day in days
                           where day.DayOfWeek == weekday
                           orderby day.Day ascending
                           select day;

            int index = Number - 1;

            if (index >= 0 && index < weekdays.Count())
                return Convert.ToString(weekdays.ElementAt(index));

            else
            
                error="The specified day does not exist in this ";

            return error;
        }

You cannot use code with List Forms.

Hi sandy, 

You can try with the InfoPath form code behind(via VSTA) to calculate the filed value, here are two articles about this topic you can take a look.

Refresh InfoPath field after code-based calculation

Using the InfoPath 2010 Object Model and Visual Studio Tools for Applications

Thanks

Daniel, the Op has a Sharepoint list form. Can you clarify if your suggestion works with list forms?

Hi teylyn,

Sorry for I missed the "list form", list form cannot use the code in InfoPath.

Thanks