Master/Detail autoselect master id

[xarion]

Hi!

I have a master called Site, each site has various children like the pic below.

It is possible that when adding a new child to automatically select the master id? I tried to follow a thread example here Add Detail record in Master Detail form but I'm battling to get the correct values to match. I have Site (with rID) then SiteContact would have its SiteID set to the Site rID. how would I formulate the expression to select the master (Site with rID)

Thanks
Xarion

[Vinod_Pillai]

1. In RowSelect Event of sites grid set a new variable SiteID to selected Site.RID
   
   
2. Now On the Click event of the [Add] button you can set above value to the required rID column

[xarion]

Hello Vinod thanks for some direction, I've managed the first part however the Click even doesnt seem to give me any Row to select. Here is the Click dialog I get for the Add button.

Essentially I'd like to set the drop list in the add screen to my Site rID.

[Vinod_Pillai]

Hi Xarion,
For dropdown list you need to first get the data on page load event

2. After that set the data obtained above to the dropdown control