//最*异常中是不提示具体哪个字段验证失败，必须到详细异常类型中查看

            try

            {

                //EF操作

            }

            catch (System.Data.Entity.Validation.DbEntityValidationException DbVEx)

            {

                //DbVEx.EntityValidationErrors.ToList()[0].ValidationErrors;

                throw;

            }

//db为EF操作数据库上下文对象

db.Configuration.ValidateOnSaveEnabled = false;