Issue with Dapper connection: TCP Provider, error: 40 - Could not open a connection to SQL Server

Question

I am trying to use Dapper to execute quires within a Microsoft SQL Server. The code I am using is the following:

public void Insert_Cycle(int cylinderId, int cycleNumber, float cycleMaxPressure, float cyleMinPressure, DateTime cycleStartTime, DateTime cyleEndTime)
{
    using (IDbConnection db = new SqlConnection(ConfigurationManager.ConnectionStrings["DB Name"].ConnectionString))
    {
        Models.T6Testing newcycle = new Models.T6Testing { CylinderId = cylinderId, CycleNumber = cycleNumber, CycleMaxPressure = cycleMaxPressure, CyleMinPressure = cyleMinPressure, CycleStartTime = cycleStartTime, CyleEndTime = cyleEndTime };
        List<Models.T6Testing> cycles = new List<Models.T6Testing>();
        cycles.Add(new Models.T6Testing { CylinderId = cylinderId, CycleNumber = cycleNumber, CycleMaxPressure = cycleMaxPressure, CyleMinPressure = cyleMinPressure, CycleStartTime = cycleStartTime, CyleEndTime = cyleEndTime });
        db.Execute("dbo.SP_INSERT_CYCLE @Cylinder_ID,@Cycle_number,@Cycle_max_pressure,@Cycle_min_pressure,@Cycle_start_time,@Cycle_end_time", cycles);
    }
}

The connection string is in the following format:

<connectionStrings>  
    <add name="DB Name"
         connectionString="Data Source=x.x.x.x,#port;Initial Catalog=Database Name;Persist Security Info=True;User ID=sa;Password=xxxxxx"
         providerName="System.Data.SqlClient" />
</connectionStrings>  

In order to test if the Connection String is in the right format I have used vttestconnectionstring from https://www.vadimtabakman.com/connection-string-tester.aspx , and I was able to run queries with it. Could someone point me in the right direction where I am making a mistake?

Answer 1

The syntax and the connection string was correct. The issue was with the UWP project, where Internet was not added to capabilities in Package.appxmanifest