循环遍历类的属性并获取非空属性的计数

Question

我想知道是否有更简单的方法来做这样的事情？

    public int NonNullPropertiesCount(object entity)
    {
        if (entity == null) throw new ArgumentNullException("A null object was passed in");


        int nonNullPropertiesCount = 0;
        Type entityType = entity.GetType();

        foreach (var property in entityType.GetProperties())
        {
            if (property.GetValue(entity, null) != null)
                nonNullPropertiesCount = nonNullPropertiesCount+ 1;
        }


        return nonNullPropertiesCount;
    }

Answer 1

怎么样:

public int NonNullPropertiesCount(object entity)
{
    return entity.GetType()
                 .GetProperties()
                 .Select(x => x.GetValue(entity, null))
                 .Count(v => v != null);
}

(其他答案结合了"获取属性值"和"测试结果为空".显然这将起作用 - 我只想将两个位分开一点.这取决于你,当然:)