How do I connect to SQL Server 2022 using VB.NET Core Desktop

The following works for local development without requiring SSL certificate installation:

"Server=localhost;Database=CombinedCommands;Trusted_Connection=True;TrustServerCertificate=True"

Trusted_Connection=True uses Windows Authentication. TrustServerCertificate=True tells the client to ignore certificate validation (typically okay for dev/test, not for production).

For production environments, you should use certs. SQL Server supports TLS encryption for connections. To implement this:

• Install a valid SSL certificate on SQL Server (trusted by clients), OR
• Use Encrypt=False (not recommended), OR
• Use TrustServerCertificate=True (not recommended for production).

Here's a sample code illustrating the use of Microsoft.Data.SqlClient:

Imports Microsoft.Data.SqlClient

Module Program
    Sub Main()
        Dim connectionString As String =
            "Server=localhost;Database=CombinedCommands;Trusted_Connection=True;TrustServerCertificate=True"

        Using connection As New SqlConnection(connectionString)
            Try
                connection.Open()
                Console.WriteLine("Connection successful.")
            Catch ex As Exception
                Console.WriteLine("Connection failed: " & ex.Message)
            End Try
        End Using
    End Sub
End Module

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hth

Marcin