Hi Joe

Your assumption is correct (I wanted to go that way because I don't see a simpler solution to setting the active record). However, ActiveContact is part of my view model and therefore unaware of grids or any other UI controls. Is it possible that the grid exposes somewhat of a design flaw here? ActiveRecord is a pretty "WinFormish" strategy and - as it appears - a one way street when it comes to binding objects. IMO, an ActiveItem property was the way to go...

Any idea for a workaround? I honestly can't imagine thatI'm the first person to set the active item through a binding expression 

Cheers

Philpp 

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Hi,

It seems that the ActiveDataItem property does'nt work with a TwoWay binding : I mean that it is possible to get the underlying DataItem when the selection changes but not  to modify the selection when the binded property is modified.

Is there any guidance ?

Thanks in advance,

Sébastien

Hi Sébastien,

I'm not sure this is related to the ActiveDataItem property.

What you are seeing might be the result of a quirk in how 2-way bindings work. When a property value changes and gets pushed from the source to the target (or vice versa) if the receiving object synchronously changes the value to something else, the updated value doesn't get pushed back.

Could this be what is happening?

If so you can take adavntage of another quirk in 2-way bindings to get around the issue. It seems that if there is a Converter specified on the binding then the value does get pushed back. So try implementing an IValueConverter that just returns the passed in value for both methods and see if that solves the issue.

Attached is a simple project that shows 2-way binding to ActiveDataItem working.

Hi, this issue is still a problem for me too.

@Joe : could you provide a test solution to see this functionality working ?

I have a same issue. from activeitem to my INotifyPropertyChanged property, it's working (if i click something, my SelectedObject is changed to the clickedvalue). but when my bound object changed, the activeItem didn't change.

All we are doing is exposing a DependencyProperty so yes 2-way binding should work.

In the Output window are you getting any binding error msgs releating to this?

How is your ObjetCourant implemented? Is it a DependencyProperty or just a CLR property?  If a CLR property does the class that exposes it implement INotifyPropertyChanged?

Hi,

Thanks for your answer, but it doesn't solve my problem... Here is my xaml implementation :

<igDP:XamDataGrid x:Name="XamDataGrid1" Theme="Office2k7Black" DataSource="{Binding Path=Sieges, Mode=TwoWay}" ActiveDataItem="{Binding Path=ObjetCourant, Mode=TwoWay, Converter={StaticResource activeDataItemConverter

}}">

And the converter :

public class ActiveDataItemConverter : IValueConverter

 {

#region

IValueConverter Members

public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture) {

return value;

}

public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture) {

return value;

}

#endregion

 The Convert method is never hit when I mark it with a breakpoint and modify the binded property... Are you sure that the TwoWay mode is supported ?

Thanks,

Sébastien