F# - >访问x.从一个让

Question

正如标题所说,那我想访问x.从一个让而不是一个成员.

以下作品:

type UploadController() =
    inherit Controller()

    member x.UploadPath 
        with get() = x.Server.MapPath "~/Uploads" 

但是这个:

type UploadController() =
    inherit Controller()

    let uploadPath = x.Server.MapPath "~/Uploads" 

引发编译错误:

命名空间或模块"x"未定义

不可能完成的任务？

Answer 1

你可以像这样定义一个引用:

type UploadController () as x =
    inherit Controller ()

    let uploadPath = x.Server.MapPath "~/Uploads"