Unable to Merge after Data Conversion

Question

I read entry with the similar solution of adding a script component after the data conversion, but I am not finding all the properties that were referenced in that solution.  Was this perhaps on a 2005 SSIS job?
I never saw a way to set the script component as Asynchronous.  I was only given the choices of None or input (Input 0) for the SynchronousInputID property of the output.  The only column having a SortKeyPosition is the Input Column and that property
is grayed out.  I did not find a way to "add an override for ProcessInputRow".  It looks like there is a method Output0Buffer.AddRow that is called from somewhere in the script, but all the method stubs have been removed.  So is there
supposed to be a main() method or something in which to enter this Output0Buffer.AddRow method. 
I don't deal with the script component normally and I need a little detail if possible.  Thanks.

Answer 1

First, you set the SynchronousInputID to None to create an Asynchronous script component.
Next, once you have set the output to be Asynchronous, you add the columns to that output.  Then there are two methods you can use to add rows to that output:
public override void Input0_ProcessInputRow(Input0Buffer Row)
Output0Buffer.AddRow();
Output0Buffer.Test = Row.Column + 1;
public override void CreateNewOutputRows()
base.CreateNewOutputRows();
for (int i = 100; i < 110; i++)
Output0Buffer.AddRow();
Output0Buffer.Test = i;
The first, xxx_ProcessInputRow is the more normal. This is what you would use if you want to populate your output with values from the input.  If you want to start from scratch, with no influence from the input, then override CreateNewOutputRows. 
I can't think of a compelling reason to use the latter.
Russel Loski, MCT, MCSE Data Platform/Business Intelligence. Twitter: @sqlmovers; blog: www.sqlmovers.com