如何动态指定 Linq OrderBy 参数? [英] How do I specify the Linq OrderBy argument dynamically?

问题描述

如何使用作为参数的值指定传递给 orderby 的参数?

How do I specify the argument passed to orderby using a value I take as a parameter?

例如:

List<Student> existingStudends = new List<Student>{ new Student {...}, new Student {...}}

目前实施:

List<Student> orderbyAddress = existingStudends.OrderBy(c => c.Address).ToList();

代替c.Address，我如何将其作为参数?

Instead of c.Address, how can I take that as a parameter?

例子

 string param = "City";
 List<Student> orderbyAddress = existingStudends.OrderByDescending(c => param).ToList();

推荐答案

这是一个使用反射的可能性...

Here's a possiblity using reflection...

var param = "Address";    
var propertyInfo = typeof(Student).GetProperty(param);    
var orderByAddress = items.OrderBy(x => propertyInfo.GetValue(x, null));

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