Validation in Linq to SQL and ASP.NET
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Manish SinghPosted Nov 21, 2011, 4:06 PM
Thanks John Charles Olamendi it's really helpful.
sukumar thotaPosted Jun 1, 2010, 11:32 AM
I have custom validation in my datacontext that if a username is already existing, it won't let another user save with the same name. That works fine when I add a new user but I am having a problem updating the same user as it validates again and finds the user existing so it throws an exception. Please let me know how can I apply validation for only certain actions like only when I add but not on update. I am using the submitchanges() method and I don't know where can I differentiate whether it's an update or adding new record. Please help me . Thanks.