Return multiple value from a method.

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im trying to return 2 output parameters from this c# method and it returning an error for the second ruturn parameter.

What I have tried:

public string getEMails(string staffid)
{
using (OracleConnection OracleConn = new OracleConnection(or))
{
OracleConn.Open();
try
{
query = "SELECT uetc.team_codes, LPAD (papf.employee_number, 5, 0) staff_id,papf.full_name full_name AND papf.employee_number = @employee_number";
OracleCommand OraC = new OracleCommand(query, OracleConn);
OraC.CommandType = CommandType.Text;
OraC.Parameters.Add(new OracleParameter("employee_number", OracleDbType.Varchar2)).Value = staffid;
//OraC.Parameters.Add(new OracleParameter("SESSION_ID", OracleDbType.Varchar2)).Value = SessionID;
//OraC.Parameters.Add(new OracleParameter("V_RESULT", OracleDbType.Varchar2, 32767)).Direction = ParameterDirection.Output;

//OracleDataReader dr = OraC.ExecuteNonQuery();
OracleDataReader dr = OraC.ExecuteReader();
while (dr.Read())
{
SupervisorEmail = dr["EMAIL_ADDRESS_1"].ToString();
StaffEmail = dr["EMAIL_ADDRESS"].ToString();
string id = dr["STAFF_ID"].ToString();

}

}
catch (Exception ex)
{

ex.Message.ToString();
}
finally
{
OracleConn.Close();
}
return SupervisorEmail;
return StaffEmail;

}
}

Posted 26-Jul-16 23:58pm

Emmablakes

Updated 27-Jul-16 0:24am

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F-ES Sitecore 27-Jul-16 6:10am

And the error is...?

1 solution

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OriginalGriff · Answer 1 · 2016-07-27T00:24:00

A method can only return one value: that is all the definition allows.
To return multiple values, you either need to use an out or ref parameter as well:

C#

public string getEMails(string staffid, out staffEmail)
   {
   ...
   staffEmail = ... ;
   return SupervisorEmail;
   }

C#

public string getEMails(string staffid, ref staffEmail)
   {
   ...
   staffEmail = ... ;
   return SupervisorEmail;
   }

And call it passing the appropriate variable to the method:

C#

string staffEmail;
string supEmail = getEMails("00001", out staffEmail);

C#

string staffEmail = "none";
string supEmail = getEMails("00001", ref staffEmail);

Or, you could create a "container class" which holds both your parameters, and return that:

C#

public class EMails
   {
   string Staff {get; set}
   string Supervisor {get; set;}
   }
...
public EMails getEMails(string staffid)
   {
   ...
   Emails em = new Emails;
   em.Staff = StaffEmail;
   em.Supervisor = SupervisorEmail;
   return em;
   }