业务验证代码的框架结构
业务验证处理委托：
Public Delegate Function RuleHandler(byval target as Object, byval e as RuleArgs) as Boolean
target：要处理的数据对象
e：验证规则参数，该参数将指导验证方法的执行。该参数至少包含：target上需要验证的数据项名称，以及其它验证条件
<Serializable()>Public Class RuleArgs
    Private mPropertyName as String
    Public ReadOnly Property PropertyName() as String
        Get
            Return mPropertyName
        End Get
    End Property
    Public Sub New(byval propertyName as String)
        mPropertyName = propertyName
   End Sub
End Class


建立验证规则管理器，验证规则管理器通过“验证名称”来管理验证规则（就要使用到HybridDictionary），对验证的管理至少包含添加验证，执行验证。
Public Class RulesManage
    '添加验证规则，所有的验证规则都由HybridDictionary来保存
    Public Sub AddRule(byval handler as RuleHandler, byval rulename as String, byval ruleArgs as RuleArgs)
    '执行验证，验证的执行通过保存在HybridDictionary中的RuleHandler来完成，对target的处理由ruleName来指导，而ruleName和RuleArgs对应，RuleArgs中包含了验证数据的名称及其它验证条件
    Public Sub CheckRules(byval target as Object, byval ruleName as String)
End Sub