refresh data problem

hi

 

ihave this code to select data and display each field in text box

 

 public void showdata()
        {
            
            string reqp = "SELECT * from table";
            cmdp = new FbCommand(reqp, con);
            con.Open();
            drp = cmdp.ExecuteReader();
            DataTable dtp = new DataTable();
            dtp.Load(drp);
            textBox1.Text = dtp.Rows[i][2].ToString();
            textBox2.Text = dtp.Rows[i][3].ToString();
            con.Close();
           
        }

 

i have second form to add data to my table but when i insert new record from form2 i have not a refrsh data

 

i call  showdata() by

Form1 obj = (Form1)Application.OpenForms["Form1"];  in form 2

 

 

 thenks