C＃拉姆達與通用T類

Question

我有一大堆的POCO類的，可以說其中的一個看起來像下面

class Person{ 
     public string Name {get;set;} 
     public int Age {get;set;} 
} 

這裏是我的泛型類，

class Helper<T> where T:class{ 

    public Func<IQueryable<T>, IOrderedQueryable<T>> GenerateOrderByExpression(string colName) 
    { 
    return x => x.OrderByDescending(y => y.colName); 
    //colName = NAME can be here for class person, it can be the Age field or something else for some other classes 
    //how do i become generic here, how can I be able to use which ever field i pass as colName 

    } 

} 

Answer 1

您可以使用反射來檢查colName是否存在並獲取其值。查看MSDN頁面 - https://msdn.microsoft.com/en-us/library/mt656691.aspx。