"Grady Morgan" wrote:

> I think you need to implement IRaiseItemChangedEvents, too.
>
> Take a look at BindingList<T>, and see if this could meet your needs
> instead of creating a custom collection.
>
> -Grady
>
> Ollie wrote:
> > Hello
> >
> > Please help me...
> >
> > I have created an object and implemented the IBindingList.
> > The object is as follows:
> > 1 project has many Sections
> > 1 section has many items,
> > 1 item has many lines.
> >
> > I have bound this object to four datagridviews to display the master-detail
> > reationships. (Thanks to a previous postee)
> >
> > 1 datagridview to display the project detials
> > 1 datagridview to display the section details
> > 1 datagridview to dsiplay the item details
> > 1 datagridview to display the line details
> >
> > My problem is this:
> >
> > I have created events for each property within each object. One of the
> > properties values in each 'line' is dependent on three other properties in
> > that same line. I have raised events as these three properties are changed to
> > notify thr datagridview that the other property has also changed. But my
> > datagridview is not updating until I click on that property.
> >
> > I have tried setting the Defaultdatasource update mode as follows on form
> > load:
> >
> > dgvLines.DataBindings.DefaultDataSourceUpdateMode =
> > DataSourceUpdateMode.OnPropertyChanged
> >
> > This didnt work either?
> >
> > Any guesses as to what I am doing wrong. I have labelled all my events by
> > the property name and the "Changed" word after them.
> >
> > In my line class I am implementing
> > Implements IEditableObject
> > Implements IDataErrorInfo
> >
> > In my lines class I am implementing
> > Inherits CollectionBase
> > Implements IBindingList
> >
> > I am doing every thing dynamically. Even creating the datagrid columns. I
> > did try using the designer to create the columns, but still didnt work.
> >
> > I have dived head first into databinding and am drowning, please help me.
> >
> > Thanks in advance for any suggestions or advice.
> >
> > Ollie
>