protected void Button4_Click(object sender, EventArgs e) { reset(); string treatmentDiagnosis = TextBox8.Text; Doctor_AddOPDTreatmentBL objAddOPDTreatmentBL = new Doctor_AddOPDTreatmentBL(); objAddOPDTreatmentBL.Doctor_AddOPDTreatment(appointmentToken, treatmentDiagnosis); Panel2.Visible = false; Panel3.Visible = true; Panel4.Visible = false; Label5.Text = "OPD Prescription Saved"; Label5.ForeColor = System.Drawing.Color.Black; Label5.BackColor = System.Drawing.Color.Yellow; LinkButton2.Visible = true; }