"Morten Wennevik [C# MVP]" wrote:

> Hi Erik,
>
> Without knowing the details it looks like you encounter some kind of eternal
> loop, although I could not reproduce your problem using a BindingList as
> source for two BindingSources. Selecting a person from the second comboBox
> would update NameID of the selected person from the first ComboBox
>
> My setup code was as follows. Person is a business object having a string
> Name and int Id property
>
> Person personA = new Person("Pete", 1);
> Person personB = new Person("James", 2);
> Person personC = new Person("Richard", 3);
> _personList.Add(personA);
> _personList.Add(personB);
> _personList.Add(personC);
>
> dataGridView1.DataSource = _personList;
>
> sourceMain = new BindingSource(_personList, "");
> sourceLast = new BindingSource(_personList, "");
>
> comboBox1.DataSource = sourceMain;
> comboBox1.DisplayMember = "Name";
> comboBox1.ValueMember = "Id";
>
> comboBox2.DataSource = sourceLast;
> comboBox2.DisplayMember = "Name";
> comboBox2.ValueMember = "Id";
>
> comboBox2.DataBindings.Add("SelectedValue", sourceMain, "Id");
>
> --
> Happy Coding!
> Morten Wennevik [C# MVP]
>
>
> "erah" wrote:
>
> > Hi!
> >
> > I have som problems using drag n drop functionallity in visualstudio 2005.
> >
> > I have created a dataset from my sqlexpress with one main table and three
> > valuetables using IDnumbers to get the realname of each child..
> >
> > I then created a datagridview and changed the IDvalues ( FKs ) to databinded
> > comboboxes to display the correct values. So far so good all values are
> > displayed correctly!
> >
> > When I try to drag n drop the detail ( as comboboxes ) these are to be used
> > to select values to change/add the data in the datagrid.
> > the bindings are set as follows:
> >
> > Datasource: NameBindingSource
> > Displaymember: Name
> > Value Member: NameID
> > Selected Value: MainBindingSource - NameID
> >
> > This works as long as I only use ONE combobox, if I add anotherone from
> > another table as follows:
> >
> > Datasource: LastNameBindingSource
> > DisplayName: LastName
> > Value Member: LastNameID
> > Selected Value: MainBindingSource - LastNameID
> >
> > The result will be that when I select a LastName I cant leave that combobx.
> > No other event will respond, the only solution is to kill the application.
> >
> > Today I noticed that if I manually add numeric values to in my database it
> > will work for the numeric values only.
> >
> > Is this a known bug or is it me using bindings the wrong way?
> >
> > I have a ready example to upload if theres anyone interested in this problem.
> > --
> > kind regards Erik