XAF 编写随笔

1. 唯一约束
• 单属性唯一约束，在属性上写：

private Evaluation _RelEvaluation;
        [RuleUniqueValue("关联评测活动不能重复", DefaultContexts.Save, CriteriaEvaluationBehavior = CriteriaEvaluationBehavior.BeforeTransaction)]
        [XafDisplayName("关联评测活动")]
        public Evaluation RelEvaluation
        {
            get
            {
                return _RelEvaluation;
            }
            set
            {
                SetPropertyValue("RelEvaluation", ref _RelEvaluation, value);
            }
        }

• 复合唯一约束，多个属性，在类上写

    [DefaultClassOptions]
     //[NavigationItem("基础管理")]
     [XafDisplayName("评价人")]
     [ImageName("BO_Person")]
     [CreatableItem(false)]
     [RuleCombinationOfPropertiesIsUnique("同一测评活动下评价人的密码不能重复", DefaultContexts.Save, "RELEvaluation, Pwd")]
     public class Appraiser : BaseObject
     { // Inherit from a different class to provide a custom primary key, concurrency and deletion behavior, etc. (https://documentation.devexpress.com/eXpressAppFramework/CustomDocument113146.aspx).
         public Appraiser(Session session)
             : base(session)
         {
         }

1. 必填项

private MemberDomainObject _RELMemberDomainObject;
         [RuleRequiredField(DefaultContexts.Save)]
         [Association("MemberDomainObject-CPSCLDO")]
         [XafDisplayName("关联会员")]
         public MemberDomainObject RELMemberDomainObject
         {
             get { return _RELMemberDomainObject; }
             set
             {
                 SetPropertyValue("RELMemberDomainObject", ref _RELMemberDomainObject, value);
             }
         }

1.