update dataset with diffgram

Question

Hi I have a xml with a parent table and a child table. I´m using datasets to read data. I want to make modifications to the child table store them in a diffgram and later open the diffgram and update the dataset using the XmlReadMode.diffgram. It only works when I modify the parent table. When I do this with the child table instead of modifying the row it adds a new row to the table. what I am missing???? Thank you!!! Tomas

Tomi · Answer

that´s all what I needed!!!! thank you very much!!! it seems that it doesn´t matter which is the primary key in the child table is that right? Unless for what I´m trying to do....

Andrzej Wegierski · Answer

Do You have a primary key in child table?