Question

页: 1 我刚才可以提出一个非常简单的问题。

方法代码很简单:

protected void Require<TValidator, TParam>(TValidator validator, Expression<Func<TValidator, TParam>> property, Predicate<TParam> predicate)
{
    var propertyValue = property.Compile().Invoke(validator);
    if(!predicate.Invoke(propertyValue))
        throw new ValidatorInitializationException("Error while initializing validator", GetType());
}

问题是,我要把更多的信息注入错误信息。从言论中获取信息是容易的。但是,我怎么能够接触到一个“友好用户”的反映上游的表述?

Answer 1

你们也必须接受,作为表达的树木:

protected void Require<TValidator, TParam>(
    TValidator validator, 
    Expression<Func<TValidator, TParam>> property, 
    Expression<Predicate<TParam>> predicateExpression)
{
    var propertyValue = property.Compile().Invoke(validator);
    Predicat<TParam> predicate = predicateExpression.Compile();        
    if(!predicate.Invoke(propertyValue))
    {    
        throw new ValidatorInitializationException(
            "Error while initializing validator: " + predicateExpression,
            GetType());
    }
}

友情链接