Please try this
1.use for loop and in argument enumerable.range(0,math.celing(dt.rowcount/10)).toarray() and set type argument to int32
- Use assign activity
str =String.Join(Environment.Newline(),Dt.AsEnumerable.Select(function(x) x(0).tostring).skip(currentitem).take(10))
This will get 10 lines concatenated with newline and gets into a string variable
Then you can use eqch to be entered as one
First step i counted the rows and divided by 10 as you wnated 10 rows to be combined i ran loop those many times
Inside used a query to get the reuired items in sets of 10 and joined them with new line as required in your application
Cheers