public IEnumerable <RuleParameter> GetParameters(Type dataContextType)
{
if (dataContextType != typeof(Order))
{
yield break;
}
yield return(new RuleParameter(
name: "Discount",
valueType: typeof(decimal),
valueResolver: RuleParameterValueResolver.FromDelegate((p, dataContext) =>
{
var order = (Order)dataContext;
return order.Total - order.Subtotal;
}),
supportedOperators: ComparisonOperators.Operators
));
}
public IEnumerable <RuleParameter> GetParameters(Type dataContextType)
{
if (dataContextType != typeof(Order))
{
yield break;
}
// 创建 ConditionParameter 实例并返回
yield return(new RuleParameter(
name: "Customer.Company", // 指定参数名称
valueType: typeof(String), // 指定参数类型为 String
valueResolver: RuleParameterValueResolver.FromDelegate(GetCustomerCompnay), // 指定参数值的获取方法
supportedOperators: new List <IComparisonOperator> // 指定该参数可以应用的比较符
{
ComparisonOperators.Equals,
ComparisonOperators.NotEquals,
ComparisonOperators.Contains,
ComparisonOperators.NotEquals
}
));
}
