App service won't connect to SQL Server

Question

Hey everyone, I am a newbie if it comes to deploying to azure. I have deployed a sql database and a blazor app. I have my connection string for my app to my database configured as the passwordless microsoft enta string but I keep running into the issue that my app can't connect to my database eventhough I have the box ticked to allow all azure services to connect to it. Could someone help this newbie out please?

Answer 1

Hello , Welcome to MS Q&A

To troubleshoot the connection issue between your Blazor app and your Azure SQL Database, consider the following steps:

1. Verify Connection String:
   • Ensure that your connection string is correctly formatted and includes all necessary parameters.
   • Example of a passwordless connection string using Azure Active Directory (AAD) authentication

               "Server=tcp:<your_server_name>.database.windows.net,1433;Database=<your_database_name>;Authentication=Active Directory Default;"
               
          
          
     

2. Check Azure SQL Database Firewall Settings:
   • Even if you have allowed all Azure services to connect, ensure that your client IP address is not blocked.
   • You can add your client IP address to the firewall rules in the firewall setting of your Database
3. Ensure AAD Authentication is Configured:
   • Verify that your Azure SQL Database is configured to use Azure Active Directory authentication.
   • Ensure that the AAD user or service principal has the necessary permissions to access the database.
4. Review Application Logs:
   • Check the logs of your Blazor app for any specific error messages that can provide more details about the connection failure.
5. Network Security Group (NSG) Rules:
   • If your database is in a virtual network, ensure that the NSG rules allow outbound traffic to the Azure SQL Database.

By following these steps, you should be able to identify and resolve the connection issue between your Blazor app and Azure SQL Database. If the problem persists, please provide more details about the error messages you are encountering.

Thanks

Deepanshu