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Dynamics 365 Community / Forums / Microsoft Dynamics NAV (Archived) / Dot Net Framework in N...
Microsoft Dynamics NAV (Archived)

Dot Net Framework in NAV2017 - How to use Functions of two Classes?

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Posted on by Community Member

Hello Community

I am very new to use dot Net in MS Dynamics NAV, and I am still at the begining.

So I want to use Dot Net to check if any file exists in a directory (I know you can do this with C/AL too, but I would like to use the dot Net method)

So my C# code looks like this:

bool isEmpty = !Directory.EnumerateFiles(path).Any();



In MS Dynamics NAV 2017 I declared a Local Dot Net Variable called DirectoryL with subtype System.IO.Directory.'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
I wrote this code:

IsEmpty := DirectoryL.EnumerateFiles(DirectoryPathP).Any();



And I get the Error message "You have specified an unkown Variable: any"

I know that the any functions is from the System.Linq.Enumerable.'System.Core but how do I combine functions of two dot net classes in one statment?
So my question is how do I use this C# statment in dynamics NAV?

Thanks for your suggestions.
Regards Joshua





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  • Community Member Profile Picture
    Community Member on at
    RE: Dot Net Framework in NAV2017 - How to use Functions of two Classes?

    Hi Stefano

    Thanks alot for your answer and the hint to codeunit 419 this was very helpful and I will look into it. Is there any documentation about the different functions in this codeunit and how to use them?

    For the info about LINQ, is there a general rule which classes/functions can not be used in C/AL?

    And just for my understanding could you maybe make a quick example, how I would write my C# statement in C/AL with seperate instructions (2 .net variables)? So I would know for the future if I had to use functions that are from 2 different classes.

    Thank you again for your help!

  • Suggested answer
    Stefano Demiliani Profile Picture
    Stefano Demiliani 37,162 Most Valuable Professional on at
    RE: Dot Net Framework in NAV2017 - How to use Functions of two Classes?

    You cannot use LINQ statement in C/AL. You need to separate the instructions or use Directory.GetFiles method:

    msdn.microsoft.com/.../07wt70x2(v=vs.110).aspx

    However, codeunit FileManagement (419) has all the instructions for what you need and it's recommended to use that also for future portability.

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