the windows form application works but the eventhandler for binding source
postionChanged got executed too many times: 12 times from saveitemclicked
for the data navigator
many time from additem

here is the code snippet:

I have a datagridview and a detailView

in form load:
           Binding regexoptionBinding = regexOptionListBox.DataBindings[0];
           regexoptionBinding.Format += new ConvertEventHandler
               (this.setRegexoptionsListBoxOnPosnChgd);

// ....

       private void setRegexoptionsListBoxOnPosnChgd(object sender,
ConvertEventArgs cevent)
       {
           addMsg("@@debug in regexBindingSource_positionChanged1 " +
cevent.Value);
           if ((cevent.Value == DBNull.Value))
           {
               cevent.Value = "0";
           }
           else
           {

setRegexoptionsListBox(cevent.Value.ToString());               }
       }

       private void setRegexoptionsListBox(string sValue)
       {
           // set regexOptions listbox
           if (sValue == "") return;
           int iro;

           try
           {
               iro = int.Parse(sValue);
           } catch (Exception eip){
               setStatus("Warning: invalid Value for regexOptions from
database=" + sValue + CScrlf + eip.Message);
               regexOptionListBox.SelectedItem = sValue;
               return;
           }

           regexOptionListBox.SelectedItem =
               regexOptionListBox.FindStringExact(sValue);
           addMsg("@@debug setRegexoptionsListBox  - "
               +"RegexOptionListBox set from db "+sValue);
       }

the problem is when I click on the save button int eh datanavigator after
changing the RegexOptionListBox to a new value, I will get the event
setRegexoptionsListBox executed 12 times..

I tried changing the code
   bool bIgnorePosnChg = false;
           private void regexBindingNavigatorSaveItem_Click(object sender,
EventArgs e)
       {
           bIgnorePosnChg = true;
           this.Validate();
           this.regexBindingSource.EndEdit();
           this.tableAdapterManager.UpdateAll(this.ieStringTmpDataSet);
           bIgnorePosnChg = false;
       }

and in the beginning of
        private void setRegexoptionsListBox(string sValue)
       {
                       if (sValue == "") return;
           int iro;

           try
           {
               iro = int.Parse(sValue);
           } catch (Exception eip){
               setStatus("Warning: invalid Value for regexOptions from
database=" + sValue + CScrlf + eip.Message);
               regexOptionListBox.SelectedItem = sValue;
               return;
           }

           regexOptionListBox.SelectedItem =
               regexOptionListBox.FindStringExact(sValue);
           addMsg("@@debug in setRegexoptionsListBox..selecteditem=" +
                regexOptionListBox.SelectedItem + ", selIDX=" +
                   regexOptionListBox.SelectedIndex + ". value=" +
                   regexOptionListBox.SelectedValue);
}

and I don't get the first record's RegexoptionsListBox properly selected
that leads to zapping the value to zero!

I am confused. I tried for house looking and different combination and I
still fail to solve the two problem: