无法在Fsharp脚本文件中打开名称空间 [英] Cannot open namespace in Fsharp script file

问题描述

在SomeLib.fs文件中的单独的Fsharp项目中，将编译以下代码:

When in a separate Fsharp project in a SomeLib.fs file the following code is compiled:

namespace SomeNameSpace
type SomeType =
    member this.SomeMember = "Some member"

，您想在脚本文件中引用并使用此类型，例如:

and you want to reference and use this type in a script file like:

#I @"c:/pathToDll/"
#r "SomeLib.dll"

这是不可能的，尽管dll的路径正确并且我检查了所有内容.同样，当SomeLib.fs文件位于同一项目中并由#load引用时，您仍然无法打开名称空间.

This is not possible, although the path to the dll is correct and I checked everything. Also when the SomeLib.fs file is in the same project and referenced by #load, you still cannot open the namespace.

我知道您可以将类型放入模块中，但是我不能这样做，因为该类型已用作Wcf服务类型.

I know you can put the type in a module, but I cannot do this as the type has te be used as a Wcf service type.

推荐答案

经过大量的实验工作和令人惊讶的互联网或F#书籍中的少量信息，我发现了以下内容:

After a lot of experimental work and surprisingly little info on the internet or in F# books I found out the following:

// Cannot use a relative path
//#I @"bin\Debug"
// Have to use a absolute path
#I @"C:\Development\FSharpNameSpaceTest\SomeCSharpLib\bin\Debug"
// But I can reference a Csharp dll lib
#r "SomeCSharpLib.dll"

// I cannot add a reference to an external F# library dll
// #I @"C:\Development\FSharpNameSpaceTest\NameSpace\bin\Debug"
// #r "NameSpace.dll"

// If I directly load the external fs file, it works"
#load @"C:\Development\FSharpNameSpaceTest\NameSpace\SomeNameSpace.fs"
#load "Library1.fs"

// Namespaces in both the local and the external fs files can only be openend if every single file is loaded instead of referencing the dll.
// Referencing a C# dll is no problem

open FSharpNameSpaceTest
open SomeCSharpLib
open NameSpace

我不知道这是否是最佳方法，但是它可以工作.我要做的是，我将为每个项目创建一个fsx文件，并将该fsx文件加载到该项目中，然后再将该fsx文件加载到引用该项目的fsx文件中.

I do not know if this is the most optimal approach but it works. What I will do is, I will create a fsx file for every project that loads the individual fs files in that project and then I will load that fsx file in the fsx file that references the project.

我仍然觉得这一切都很令人困惑和违反直觉.但这可能是我对F#内部作品的有限了解

I still find this all very confusing and counterintuitive. But that might be my limited knowledge of the innerworks of F#

正确而完整的答案是，我没有实现默认的构造函数.不过，如果您不想这样做，可以使用上述方法.感谢Marc Sigrit.

And the right and complete answer is, I didn't implement a default constructor. Still, if you do not wan't to do this, the above approach is an alternative. Thanks to Marc Sigrit.

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