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;

               
}