如何使用lambda表达式和匿名类型获取类型的属性名称？(How do I get property names of a type using a lambda expression and anonymous type?)

 我正在尝试使用表达式树和匿名类型来实现以下功能。 
 
 假设我有这个课程： 
 
class Person
{
   public string FirstName {get;set;}
   public string MiddleName {get;set;}
   public string LastName {get;set;}
   public DateTime DateOfBirth {get;set;}
}
 
 现在我希望能够调用以下内容： 
 
string[] names = Foo<Person>(x=> new { x.LastName, x.DateOfBirth });
 
 我希望名称包含2个项目，“LastName”和“DateOfBirth”。 
 
 我试图以编译时安全的方式扩展PetaPoco而不是编写字符串sql，这样我就可以指定我想要包含在SQL中的属性/列列表，而不是选择所有内容。 我有一些非常大的实体，有些情况下我不想出于性能原因选择所有列。 

I am trying to use Expression Trees and anonymous types to achieve the following.
 
Let's say I have this class:
 
class Person
{
   public string FirstName {get;set;}
   public string MiddleName {get;set;}
   public string LastName {get;set;}
   public DateTime DateOfBirth {get;set;}
}
 
Now I want to be able to call the following:
 
string[] names = Foo<Person>(x=> new { x.LastName, x.DateOfBirth });
 
I want names to contain 2 items, "LastName" and "DateOfBirth".
 
I am trying to extend PetaPoco, in a compile time safe way rather than writing string sql, so that I can specify a list of properties/columns I want to include in the SQL, rather than it selecting everything. I have some pretty large entities and there are cases where I do not want to select all the columns for performance reasons.

原文：https://stackoverflow.com/questions/9916269