问题
I've been doing some searching on the internet, but I can't seem to find the awnser. What exceptions can a DataContext throw? Or to be more specific, what exceptions does the DataContext.SubmitChanges() method throw?
EDIT
For reference, here a List of possible known exceptions that could be thrown by the L2S DataContext:
- SqlException
- ChangeConflictException
- DuplicateKeyException
- ForeignKeyReferenceAlreadyHasValueException
- OutOfMemoryException (when not correctly disposing the DataContext)
回答1:
You're right, MSDN is not a great help here. This is what I can remember from the top of my head:
- SqlException (from the ADO.NET layer)
- ChangeConflictException (L2S)
- DuplicateKeyException (L2S)
- Anything that cusomized overrides (partial void OnXXXEntity) may raise
回答2:
Well, there are underlying database exceptions (I think of type SqlClientException) when the error occurs at the database level. There is the ChangeConflictException that it throws when it detects a concurrent change by another user. There may be others depending on whether a value is null when it shouldn't be, that sort of thing. A lot of the errors are unrelated to the context itself directly.
HTH.
来源：https://stackoverflow.com/questions/2904317/exceptions-by-datacontext