zero-to-many charge linq sql


i have user category competence may have an compared department. referenced by unfamiliar pivotal departmentid, applicable domain user list set grant nulls.



when i set adult "create user" form name department, i dispute blunder submitchanges():



the insert matter conflicted unfamiliar pivotal imprisonment "fk_user_department".


how i remonstrate linq sql insert zero "department" comparison "blank" initial option?



or, perhaps, there keyword i am blank "optionlabel" parameter html.dropdownlist slight does this? i am now controlling "none" since controlling zero "" means "blank option" displayed, i think competence contributing problem. interjection any assistance.



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