CSLA验证规则总结

 

CSLA业务规则

 

验证规则所在空间: Csla.Rules

基类 BusinessBase 的属性   BusinessRules 中记录了业务类的验证规则

 

 

验证规格的写法

 

 

private class MyRule : Csla.Rules.BusinessRule 

  protected override void Execute(RuleContext context) 
  { 
    var target = (Customer)context.Target; 
    if (target.Sales < 10) 
      context.AddInformationResult("Customer has low sales"); 
  } 
}

 

 

添加验证规则

 

protected override void AddBusinessRules() 

  base.AddBusinessRules(); 
  BusinessRules.AddRule(new MyRule { PrimaryProperty = SalesProperty }); 
}

 

多数规则都需要设置一个主要属性(PrimaryProperty),在构造函数中中为其赋值,比如下面的 Required,MaxLength 规则

 

    protected override void AddBusinessRules()

    {

      base.AddBusinessRules();

      BusinessRules.AddRule(new MyRule { PrimaryProperty = SalesProperty });

      BusinessRules.AddRule(new Csla.Rules.CommonRules.Required(NameProperty));

      BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(NameProperty, 20));

}

 

 

 

 

 

 

引发验证规则

 

BusinessRules.AddRule(new MyRule { PrimaryProperty = SalesProperty });

 

 

在之前的AddRule() 调用中,PrimaryProperty 属性被设置为 SalesProperty

把验证规格 和 特定的属性关联在一起,一旦属性(SalesProperty)变动,验证规则就会被自动触发。

 

如果没有提供 为验证规则提供PrimaryProperty,业务规则是和业务类进行关联的。

 

 

基类 BusinessBase 的属性    BusinessRules 中有三个方法来检查验证规格

 

 

1 、CheckRules() – 检查对象中的所有验证规则。

2、CheckObjectRules()  - 仅校验不和属性关联的验证规则。

3、CheckRules(property) – 检查某个属性的所有规则。

 

框架中的实现

var rulesProperty

= typeof(BusinessBase).GetProperty("BusinessRules",BindingFlags.DeclaredOnly | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.NonPublic);

 

                if (rulesProperty != null)

                {  

                    var rules = rulesProperty.GetValue(this.Basic, null) as Csla.Rules.BusinessRules;

                    if (rules != null)

                    {

                        rules.CheckRules();

                    }

                }

                else

                {

                    messageService.ShowError("rulesProperty == null");

                }

 

 

 

 

 

 

 

提示实效规则列表

 

实效列表 BrokenRulesCollection

 

if (this.Basic.BrokenRulesCollection.Count > 0)

                {  

                    string temp = string.Empty;

 

                    foreach (var item in this.Basic.BrokenRulesCollection)

                    {

                        temp += item.Description + "\r\n";

                    }

 

                    messageService.ShowError(temp);

 

                    return result;

                }

posted @ 2013-07-11 09:40  巴别塔  阅读(541)  评论(0编辑  收藏  举报