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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / How to deal with DotNe...
Small and medium business | Business Central, N...
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How to deal with DotNet or dll files while moving from onPrem to Cloud (AppSource) development in Business Cnetral

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Posted on by M Hussnain Javed 241

Hello everyone,

How are you all? Hope you all are fine. I am looking for a way to deal with dll or DotNet files while moving from onPrem to Cloud development in Business Central.

I've been already passed through all the following technical validations for moving from onPrem to AppSource. 

https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-checklist-submission 

But when I changed "target" property in app.json from "OnPrem" to "Cloud"

"target" : "Cloud"

I got several errors regarding DotNet or dll files.

appjson.jpg dotNet.jpg

Can anyone please tell me that how can I deal with these errors or how can I move from onPrem to Cloud (AppSource) development within these dll or DotNet files. Answers will be highly appreciated. Thanks for reading.

 

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  • Verified answer
    Lars Lohndorf-Larsen Profile Picture
    Lars Lohndorf-Larsen on at
    RE: How to deal with DotNet or dll files while moving from onPrem to Cloud (AppSource) development in Business Cnetral

    Good point about the new .al datatypes to replace some .net uses.

  • Verified answer
    Steven Renders Profile Picture
    Steven Renders 5,630 Moderator on at
    RE: How to deal with DotNet or dll files while moving from onPrem to Cloud (AppSource) development in Business Cnetral

    .NET interop is not allowed in BC Saas. .NET Interoperability is only available on-premise.

    FAQ for Developing in AL - Business Central | Microsoft Docs

    For cloud solutions .NET interop is not available due to safety issues in running arbitrary .NET code on cloud servers.

    With the AL Language extension, you can find AL types that replace the most typical usages of .NET like HTTP, JSON, XML, StringBuilder, Dictionaries, and Lists. Many .NET usages can be replaced directly by the AL types resulting in much cleaner code. For more information, see HTTP, JSON, TextBuilder, and XML API Overview.

    For things that are not possible to achieve in AL code, the recommendation is to use Azure Functions to host the DLL or C# code previously embedded and call that service from AL.

  • Verified answer
    Lars Lohndorf-Larsen Profile Picture
    Lars Lohndorf-Larsen on at
    RE: How to deal with DotNet or dll files while moving from onPrem to Cloud (AppSource) development in Business Cnetral

    Hello,

    Good question. You need to move the dll functionality to also run in the cloud. Azure functions is designed for that. A few good places to start:

    docs.microsoft.com/.../

    community.dynamics.com/.../business-central-nav-integration-with-azure-service-bus-using-azure-function

    And, I am sure that these sites can also help:

    https://demiliani.com/

    https://www.kauffmann.nl/

    https://www.hougaard.com/

    And I hope you get more replies here with more details.

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