命名参数使用参数 [英] Named parameters with params

问题描述

我从数据库中获取值的方法

I have a method for getting values from database.

 public virtual List<TEntity> GetValues(
           int? parameter1 = null,
           int? parameter2 = null,
           int? parameter3 = null,
           params Expression<Func<TEntity, object>>[] include)
        {
            //...
        } 

如何我可以调用与命名参数此功能可以不写在所有的参数包括：？
我想要做这样的事情。

How can I call this function with named parameter to not write all parameters before include? I want to do something like this

var userInfo1 = Unit.UserSrvc.GetValues(include: p => p.Membership, p => p.User);

但这似乎不工作？的如何使用使用参数命名参数的

推荐答案

我认为唯一的办法是一样的东西？

I think the only way is something like:

GetValues(include:
   new Expression<Func<TEntity, object>>[] { p => p.Membership, p => p.User })

这是不是很大。这将是可能是最好的，如果你添加了对过载：

Which is not that great. It would be probably best if you added an overload for that:

public List<Entity> GetValues(params Expression<Func<Entity, object>>[] include)
{
    return GetValues(null, null, null, include);
}

然后调用你的方法，就像

Then you call your method just like

GetValues(p => p.Membership, p => p.User)

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