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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details
如果使用的是Code First,使用update database -verbose完成了miragtion 之后,运行发现异常:
Validation failed for one or more entities. See ‘EntityValidationErrors‘ property for more details
这是由于migration对model的更改导致了db中column的限制(例如长度,StringLength(30)会导致nvarchar(max)变为nvarchar(30))
想要看到异常的具体信息,可以catch DbEntityValidationException :
try { // Your code... // Could also be before try if you know the exception occurs in SaveChanges context.SaveChanges(); } catch (DbEntityValidationException e) { foreach (var eve in e.EntityValidationErrors) { } }
Validation failed for one or more entities. See 'EntityValidationErrors' property for more details
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