private void loadDataInComboBox()
 {
     List<MemberEntry> allMembers = new List<MemberEntry>();
     allMembers = new MemberCodeEntryBLL().getMemberCodeInfo();
     memberIdComboBox.DataSource = allMembers;
     memberIdComboBox.ValueMember = "memberId";
     memberIdComboBox.DisplayMember = "memberId";
     memberIdComboBox.Text = @"select member Id";
 }
 private void updateButton_Click(object sender, EventArgs e)
 {
     try
     {
         MemberCodeEntryBLL aMemberCodeEntryBll = new MemberCodeEntryBLL();
         MemberEntry aMemberEntry = new MemberEntry(Convert.ToInt32(memberIdTextBox.Text), memberNameTextBox.Text,
             roomNoTextBox.Text, addressTextBox.Text, dateTimePicker1.Value);
         string msg = aMemberCodeEntryBll.update(aMemberEntry);
         MessageBox.Show(msg, @"Message");
         Hide();
         new MemberCodeEntryUI().Show();
     }
     catch(Exception exception)
     {
         MessageBox.Show(exception.Message,@"Message");
     }
 }