private void buttonX1_Click(object sender, EventArgs e)
        {
            if (comboBoxEx5.SelectedValue != null && comboBoxEx4.SelectedValue != null && comboBoxEx3.SelectedValue != null)
            {
                Patient obj = new Patient();
                obj.Name           = textBoxX1.Text;
                obj.PhoneNo        = textBoxX4.Text;
                obj.Address        = textBoxX3.Text;
                obj.Age            = (int)numericUpDown1.Value;
                obj.Gender         = radioButton1.Checked ? true : false;
                obj.DoctorId       = (int)comboBoxEx5.SelectedValue;
                obj.ReceptionistId = (int)comboBoxEx3.SelectedValue;
                obj.RoomId         = (int)comboBoxEx4.SelectedValue;

                try
                {
                    BL.Create(obj);
                    refresh();
                    textBoxX1.Text       = "";
                    textBoxX3.Text       = "";
                    textBoxX4.Text       = "";
                    numericUpDown1.Value = 0;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "خطا");
                }
            }
            else
            {
                MessageBox.Show("همه فیلد ها را تکمیل کنید", "خطا");
            }
        }