CODEWITHSUNDEEP
f#f#-interactive
Simon Woods
Simon Woods

Reputation: 2241

Fsx execution path

I have a c# .net library I am looking to use within FSI/FSX. As part of the initialization of the .net lib, by default it expects and references a custom config file (MyAppConfig.xml) which loads various things before it can be used. When using it in c# it gets copied to the bin folder and the app by default expects it to be there and references it there unless there is a specific entry in the app.config to tell it otherwise. (I should add that it does it all by convention rather than injecting a path + filename, as per NLog, say)

I have an f# source file in a console app which will execute this initialization find, but I can't quite work out how to achieve this with FSI/FSX.

So my program.fs looks simply like

open System
open myApp

module Program =   

    [<EntryPoint>]
    let Main(args) =            
        myApp.Initialization.Load()  // references MyAppConfig.xml

        Console.WriteLine("do my stuff!")
        Console.ReadLine() |> ignore
        0

If I try and do the same in FSI or using FSX, I have

#r @"E:\...path to MyApp...\MyApp.dll" 
#I @"E:\...path to MyAppConfig.xml ..."

Environment.CurrentDirectory <- @"E:\...path to MyAppConfig.xml ..."

myApp.Initialization.Load() |> ignore  // fails ... can't find MyAppConfig.xml

//do my stuff

I suspect that I've not got the paths quite right.

I'd be grateful of a steer

EDIT:

So I've managed to attach a debugger to the c# lib and see where it is looking for the config file - turns out it is "c:\Program Files\Microsoft F#\v4.0\" ( System.AppDomain.CurrentDomain.BaseDirectory) which again shows I've not quite understood how to tell FSI/FSX to use a particular path. If I copy the config file (MyAppConfig.xml) to that location it works fine.

Many thx

S

Upvotes: 1

Views: 482

Answers (1)

Daniel
Daniel

Reputation: 47904

I'm not sure of the implications, but one possiblity might be temporarily changing the app base:

let origAppBase = AppDomain.CurrentDomain.BaseDirectory
AppDomain.CurrentDomain.SetData("APPBASE", "path_to_MyAppConfig.xml")
myApp.Initialization.Load() |> ignore
AppDomain.CurrentDomain.SetData("APPBASE", origAppBase) //restore original app base

Upvotes: 1

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