ssis assign a value to a guid when null

Question

I have the following expression in ssis

(ISNULL [rowguid]? (DT_WSTR, 255)"00000000-0000-0000-0000-000000000000":[rowguid])

What I want is to assign that guid if there is null present. I just can't seem to get it working

Answer 1

I finally figured this one out. You need to include "{" and "}" on the front and end of your default GUID. So for example, (DT_GUID) "{00000000-0000-0000-0000-000000000000}".

A little frustrating, I tried "[]" but never even thought to try "{}".

Answer 2

FInally通过跟踪和错误得到了答案

  (DT_STR,50,1252) (ISNULL( [rowguid]) ? "00000000-0000-0000-0000-000000000000" : (DT_STR,50,1252) [rowguid]) != (DT_STR,50,1252) (ISNULL( [rowguid]) ? "00000000-0000-0000-0000-000000000000" : (DT_STR,50,1252) [rowguid])