listboxa çekerken kullandığım kod:
SqlCommand com = new SqlCommand(@"SELECT * FROM SeansIlaclar si INNER JOIN Ilaclar i ON si.IlacID = i.IlacID WHERE si.SeansID=" + ana.Seanslar_SeansID(), con);
SqlDataAdapter da = new SqlDataAdapter(com);
DataSet ds = new DataSet();
da.Fill(ds);
listBox1.DataSource = ds.Tables[0];
listBox1.DisplayMember = "IlacAdi";
listBox1.ValueMember = "IlacID";