I'm getting total crazy now.  In my standard application framework I have made several Maintenance Dialogs - but suddenly on a new dialog I'm getting InvalidCastException on everything.....  It states the it is "Unable to cast of type 'System.DBNull' to type 'System.String'" on my primary key field.

The destination table and it happens everytime I click the NEW buttom!!!!!

What the he.. is going on...  Am I missing a flag or.....

Hope that some of you can come up with a way to get me back on track!

Regards
Ulrik

It is working when there are data in the table.
If the table is empty, I get the casting error when the BusinessBindingSource is on the WinForm.
Amy ideas on how to suppres this error during creation of the firste record in a table????

/Ulrik

Ulrik,

You are trying to do some very basic stuff, so as I mentioned in my previous post, it would help if I could see a sample so I know what you are doing.  An invalid cast exception can from from a lot of places.  The grid can play a role in this since you are binding...so my guess is that you have some logic somewhere within the grid or other event that is causing the issue.  Without seeing a reproduction it is going to be hard to give you any straight answers.