I find I can input in the active cell when there is an adorning editor. I use the sample project from:
http://blogs.infragistics.com/blogs/josh_smith/archive/2008/09/15/introducing-a-new-xamdatagrid-behavior-displayadorningeditors.aspx
HI lishengije,
I am reviewing the sample in the attached blog post.
Sincerely, Matt DSE
HI Lishengije,
I am working with my team lead to resolve this issue.
Sincerely, Matt Developer Support Engineer