Control cannot fall through from one case label (case "Juventus":') to another. Any idea why?

Question

I am retrieving Control cannot fall through from one case labe (case "Juventus":') to another. Any idea why? I am trying to open a different form to print based on the result of the query. Thanks

using (SqlConnection connection = new SqlConnection("Data Source=xxxx;Initial Catalog=Marketing;Integrated Security=True"))
{
    SqlCommand command = new SqlCommand("select [Team] from baf where id=(select max(id) from baf)", connection);
    connection.Open();
    SqlDataReader read = command.ExecuteReader();
    while (read.Read())
    {
        String AAA = (read["Team"].ToString());
        switch (AAA)
        {
            case "Arsenal":
                Print dd = new Print();
                dd.Show();
                break;
            case "Juventus":
                Print2 dd2 = new Print2();
                dd2.Show();
            case "Porto":
                Print3 dd3 = new Print3();
                dd3.Show();
                break;
            case "Bayern Munich":
                Print4 dd4 = new Print4();
                dd4.Show();
                break;
            }
            this.Close();
        }
    }
}

Answer 1

Unlike C or C++, C# does not allow switch/case statements where the control flow can "fall through" from one case into the next.

In c, this would work

switch(i)
{
    case 1: printf("1");
    case 2: printf("1 or 2"); break;
}

and it would print 1 and 1 or 2 if i was 1, but only 1 or 2 if i was 2.

In c#, this is not allowed. Every non-empty case must exit the whole switch statement. This can either be done by

• break
• return
• throw or even
• goto

So you're missing the break statement at your case "Juventus":

case "Juventus":
    Print2 dd2 = new Print2();
    dd2.Show();
    break; // you forgot that

---

Edit: as others mentioned, empty case statements are allowed to fall through:

switch(i)
{
    case 1:
    case 2:
        // do something if i is 1 or 2
        break;
}

Answer 2

add break; before statement

case "porto":