sql server - error in connecting to sql from C# windows form application -

i have form in c# user , pass , form shows informations of employees 2 tables in sql server want show in gridview.

private void button1_click(object sender, eventargs e) {     string userid = textbox1.text;     string passwrd = textbox2.text;     sqlconnection myconnection = new sqlconnection("server=.,sql2014;database=mytamrin;uid=sa;password=sa123;");     try     {         myconnection.open();     }     catch (exception r)     {         messagebox.show(r.tostring());         console.writeline(r.tostring());     }      sqlcommand sqlcomm = new sqlcommand();          sqlcomm.commandtext = "select count(*) dbo.empp fldusername = @snum , fldpassword = @pass";         sqlcomm.parameters.addwithvalue("@snum", userid);         sqlcomm.parameters.addwithvalue("@pass", passwrd);         if ((int16)sqlcomm.executescalar()==1)         {             userinfo mainform = new userinfo();             mainform.show();          }  

what problem?

you're not specifying the:

sqlcomm.connection = myconnection;