CodexBloom - Programming Q&A Platform

Azure SQL Database connection string issues in .NET Core 6.0 application with Entity Framework Core

šŸ‘€ Views: 9170 šŸ’¬ Answers: 1 šŸ“… Created: 2025-06-10
azure entity-framework-core sql-database dotnet-core C#

Hey everyone, I'm running into an issue that's driving me crazy. I'm confused about I tried several approaches but none seem to work. I'm stuck on something that should probably be simple. I'm running into issues connecting my .NET Core 6.0 application to an Azure SQL Database using Entity Framework Core. I have configured my connection string in the `appsettings.json` file like this: ```json "ConnectionStrings": { "DefaultConnection": "Server=tcp:myazureserver.database.windows.net,1433;Initial Catalog=mydatabase;continue Security Info=False;User ID=myusername;Password=mypassword;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;" } ``` However, when I try to run the application, I'm getting the following behavior: ``` System.Data.SqlClient.SqlException: 'A network-related or instance-specific behavior occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.' ``` I've ensured that the firewall settings in the Azure portal allow my local IP address, and I can connect to the database using SQL Server Management Studio (SSMS) without issues. I also checked that the SQL Database is up and running. I have tried both the `tcp` and `non-tcp` formats for the server name, but the behavior continues. Additionally, I’m using the latest version of Entity Framework Core (7.0.0) and have installed the required NuGet packages: ```bash Install-Package Microsoft.EntityFrameworkCore.SqlServer Install-Package Microsoft.EntityFrameworkCore.Tools ``` What could be causing this connection scenario, and how can I troubleshoot further? Are there specific configurations I might be missing, or should I consider using managed identities instead of SQL authentication for better security? My development environment is Windows. This is part of a larger API I'm building. Has anyone else encountered this?