Скачать или смотреть Resolving LocalDB Not Supported Error in Azure API by Utilizing Environment Variables

Learn how to fix the `LocalDB is not supported` error in your Azure API by ensuring you're using the correct connection string from Azure App Service configuration.
---
This video is based on the question https://stackoverflow.com/q/68377562/ asked by the user 'kaumnen' ( https://stackoverflow.com/u/13198771/ ) and on the answer https://stackoverflow.com/a/68377725/ provided by the user 'Vova Bilyachat' ( https://stackoverflow.com/u/1100248/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Azure API doesnt use connection string from configuration, but local one

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding the Issue: LocalDB Not Supported in Azure API

If you’ve ever encountered the error message System.PlatformNotSupportedException: LocalDB is not supported on this platform while working on your Azure API project, you’re not alone. This common pitfall arises when the API fails to properly use the connection string configured in Azure, and instead defaults to a local configuration which is incompatible with the Azure environment.

The Scenario

In many cases, developers assume that the connection string specified in their Azure configuration will automatically be used. However, if the API is set up to read configuration settings solely from a local JSON file (appsettings.json), it will not pull the correct values from Azure. As a result, the API returns a 500 status error when trying to connect to the database.

In this guide, we will walk you through solving this issue by modifying your connection string retrieval method to include environment variables from the Azure App Service configuration.

Solution: Retrieve Connection Strings Correctly

Step 1: Update Your Configuration Retrieval Method

The crux of the problem lies in the way the configuration is built. By default, your current code only reads from the JSON file without considering any settings stored in the Azure environment. To fix this, you will need to adjust the GetConnectionString method to utilize AddEnvironmentVariables.

Revised Code

Here’s how you can modify your GetConnectionString method:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Install Necessary Package

To use AddEnvironmentVariables, make sure to include the following NuGet package in your project:

[[See Video to Reveal this Text or Code Snippet]]

This package allows your application to read configuration values defined in Azure App Service directly.

Alternative Approach: Framework References

If you find yourself needing a broader array of ASP.NET Core functionalities, you can add a framework reference directly to your project. However, be cautious with this approach, as it can pull in many unnecessary dependencies.

Example Reference:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you can resolve the error regarding LocalDB and ensure that your Azure API pulls the correct connection string from the Azure App Service configuration. The key takeaway is that when deploying applications on Azure, it’s essential to incorporate environment variables into your configuration setup to avoid local dependencies that may not work in a cloud environment.

Now you can confidently retrieve application settings and connection strings, making your Azure API a robust solution without local limitations! Happy coding!