InfoPath Dev

I am trying to write a rule that sets the value of a field with another field's value that is not known at design time.

 Depending on which option is selected (1,2,...) I want to select the value from fields: comm_1, comm_2, comm_3,....., comm_n and put it into Field A

So I have 3 fields involved in this rule.

#1 The option group field that the user will select <-- Known (this is the field the rule is set on)

#2 The field that will get the value <-- Known

#3 The field that has the value I need to set #2 above <-- Unknown at design time

I tried this and it does not work:

    concat("../my:comm_1text/my:comm_", .)

When I select option 2, I get this value in Field A:

     ../my:comm_1text/my:comm_2 <=== this is the name of the field that has the value.

Any suggestions?

Created a new Infopath 2010 form.  

With focus on Options, on ribbon "Add rule" (later "Manage rules")

In "Rules" pane, New --> Action
Condition: Options = 1 (in last drop-down-lis choose "Type a number..." )
Rule type: Action

It should be possible to pull this off with a single rule action and no conditions.  As you've discovered, concat("../my:comm_1text/my:comm_", .) won't work because that just produces the text value ../my:comm_1text/my:comm_X.

How about something like this:

../my:comm1_text/*[local-name() = concat('comm_', current())]

Jimmy:

It should be possible to pull this off with a single rule action and no conditions.  As you've discovered, concat("../my:comm_1text/my:comm_", .) won't work because that just produces the text value ../my:comm_1text/my:comm_X.

How about something like this:

../my:comm1_text/*[local-name() = concat('comm_', current())]

Using a single rule is exactly what I am looking for.  This looks promising, I'll give it a try.