MVC :: Relation Integrity LINQ To SQL On Deleting Parent Rows?
Nov 9, 2010
I have a MVC project wich uses LINQ to SQL as a data layer.
For example, I have a tables ProductGroups and Products. Product is a child of ProductGroup, so to get name of ProductGroup, in aspx-page I use constuction like Model.ProductGroup.Name.
But when I delete a ProductGroup there is appear a NullReference Exception in presentation page.
While I was using just DataSet and manual SQL-queries, the rows, there was not every joined-element present, simple were not put in query result.
I know that before delete Parent row I have to delete all children rows, it's correct way.
1. Is there a way to ignore rows which has null-elements without manual checking through "IF"?
2. Is there simple way to delete all dependencies without manual enumerating every related tables?
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