Hi,

Our ui requires that we construct complex objects that contain a collection of "sub-objects" and bind them to a XamDataGrid in code via UnboundField objects.  A property of the sub-object is then displayed in the ui (Factor in this case). This works perfectly with changes in the ui correctly being made to the underlying sub-object.  This sub-object contains an Error property which contains the result of any edit rules validation.  When I try to bind the Error property to the UnboundField ToolTip property in a way similar to how the Factor property was bound it always fails.  Below is the code that builds the columns for the ui:

foreach (BusinessRevisionFactorColumn brfCol in columns)

{

UnboundField uf = new UnboundField(); //string.Format("Hrs[{0}]", i));

uf.BindingPath = new PropertyPath(string.Format("FactorsArray[{0}].Factor.Factor", i));

uf.BindingMode =BindingMode.TwoWay;

uf.Label = brfCol.Name;

Binding ttBinding = new Binding()

{

Path =new PropertyPath(string.Format("FactorsArray[{0}].Factor.Error", i)),

RelativeSource =new RelativeSource(RelativeSourceMode.Self)

};

BindingOperations.SetBinding(uf, UnboundField.ToolTipProperty, ttBinding);

uf.DataType =typeof(double);

uf.Settings.LabelTextWrapping =TextWrapping.Wrap;

uf.Settings.CellValuePresenterStyle = (Style)idgvFactors.FindResource("FactorCellsStyle");

uf.Settings.AllowResize =false;

fl.Fields.Add(uf);

i++;

}

I need to get access to the Error property in the MouseEnter event of the CellValuePresenter but can't find a way to get to the correct sub-object via the DataContext DataItem since these sub-objects live in a collection/array within the DataItem. I don't need to use the ToolTip if there's a way to get to the correct sub-object via some other mechanism.

Can you point me in a direction to pursue?

Thanks!

Glenn