动态属性名称 [英] dynamic property name

问题描述

我正在尝试编写一个带有动态属性名称的linq查询.因此，例如，如果属性名称为"test"，则简单查询如下所示:

I'm trying to write a linq query that takes a dynamic property name. So for example, if the property name is 'test', a simple query would look like this:

var test = testList.Select(x => x.test).Distinct().ToList();

但是我想动态生成属性名称，例如:

But I want to dynamically generate the property name, eg:

var propertyName = "test";

var test = testList.Select(x => x.propertyName).Distinct().ToList();

我收到一个错误消息，因为'propertyName'不是实际属性.

I get an error because 'propertyName' isn't an actual property.

实现此目标的最佳方法是什么?

What would be the best way to achieve this?

推荐答案

您必须使用反射来做您想做的事情:

You'd have to use reflection to do what you're trying to do:

var test = testList
               .Select(x => x.GetType().GetProperty(propertyName).GetValue(x))
               .Distinct()
               .ToList();

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