ToolStripComboBox.SelectedItem change does not propagate to binding source
My binding is set up as this:
_selectXAxisUnitViewModelBindingSource = new BindingSource();
_selectXAxisUnitViewModelBindingSource.DataSource = typeof(SelectXAxisUnitViewModel);
_selectedUnitComboBoxBindingSource = new BindingSource();
_selectedUnitComboBoxBindingSource.DataSource = _selectXAxisUnitViewModelBindingSource;
_selectedUnitComboBoxBindingSource.DataMember = "AvailableUnits";
_selectedUnitComboBox.ComboBox.DataSource = _selectedUnitComboBoxBindingSource;
_selectedU开发者_Go百科nitComboBox.ComboBox.DisplayMember = String.Empty;
_selectedUnitComboBox.ComboBox.ValueMember = String.Empty;
_selectedUnitComboBox.ComboBox.DataBindings.Add("SelectedItem",
_selectXAxisUnitViewModelBindingSource,
"SelectedUnit", true, DataSourceUpdateMode.OnPropertyChanged);
// this is a bug in the .Net framework: http://connect.microsoft.com/VisualStudio/feedback/details/473777/toolstripcombobox-nested-on-toolstripdropdownbutton-not-getting-bindingcontext
_selectedUnitComboBox.ComboBox.BindingContext = this.BindingContext;
The property "AvailableUnits" is a collection of strings and the "SelectedUnit" is a string-property. Now the dropdown list is populated as expected, but when I select and item in the list, the change is not propagated to the binding source. Any idea what I am doing wrong?
Update:
I Created a little test project and this problem occurs when I add a ToolStripComboBox as a subitem of another ToolStripItem. If I add the ToolStripItem directly to the MenuStrip everything works fine. The BindingContext is not assigned to the ToolStripComboBox when added as a sub item (see my code-comment) and my fix doesn't seem to do whats necessary to get this to work.
Can you change
_selectXAxisUnitViewModelBindingSource.DataSource = typeof(SelectXAxisUnitViewModel);
To
_selectXAxisUnitViewModelBindingSource.DataSource = new SelectXAxisUnitViewModel();
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