Question

I use Visual Studio 2010

I have a DataSet with 2 tables

one (MainList) has type, name, path, parameter
the other (UpadteList) has path, hash, date

I added files to this list and it work with out problem, now I have the following

when I add file type “update”
it will be “Update”,”My Program”, “PATH-TO-/my.setup.exe”,”/minimized”

if it was type “Update”
the following data goes to (UpdateList)
“PATH-TO-/my.setup.exe”,”asdfwefwfgg3r34t34t34t”,”2010-09-01″

I want when a row in the (MainList) deleted and a row with the same path in (UpdateList) exsist it will deleted too

should I use loop or (I saw) in dataSet properties use Relations

what is the best approach ?

with loops I got into some ugly bugs that delete everything in the Mainlist!

note: I use XML to store data (the data is not big)

Answer 1

IMO, you have two choices

1. Use DataTable constraints such as ForeignKeyConstraint with DeleteRule=Cascade settings.
2. Use RowDeleted/RowDeleting event on MainList data-table to look up and delete the corresponding row in other table.