I have a combo box in a grid cell which populates data from collection. However, it's value is not getting saved in the grid cell when focus is moved to another row in the grid. Any pointers would be greatly appreciated.

Are you binding the SelectedValue property using a CellEditorBinding? If not, that is most likely the cause of the behavior you are experiencing.

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Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

Hi Jenny,

I am binding the SelectedValue property using a CellEditorBinding. However, not sure if that's correct. Here is the code -

DataGridCollectionView theView = new DataGridCollectionView(roomsListNew, typeof(ExchangeRoomResource), false, false);

theView.DetailDescriptions.Add(new ParentDetailDescription());

Binding binding = new Binding();

binding.Source = roomsConflictList;

//binding.Mode = BindingMode.TwoWay;

//binding.Path = ???

//binding.UpdateSourceTrigger = ???

DataTemplate myEditorTemplate = new DataTemplate();

myEditorTemplate.VisualTree = new FrameworkElementFactory(typeof(ComboBox));

myEditorTemplate.VisualTree.SetValue(ComboBox.ItemsSourceProperty, binding);

myEditorTemplate.VisualTree.SetValue(ComboBox.SelectedValuePathProperty, "AlternateRoomName");

myEditorTemplate.VisualTree.SetValue(ComboBox.DisplayMemberPathProperty, "AlternateRoomName");

Xceed.Wpf.DataGrid.Markup.CellEditorBindingExtension cellbinding = new Xceed.Wpf.DataGrid.Markup.CellEditorBindingExtension();

myEditorTemplate.VisualTree.SetBinding(ComboBox.SelectedValueProperty, (BindingBase)cellbinding.ProvideValue(null));

CellEditor cellEditor = new CellEditor();

cellEditor.EditTemplate = myEditorTemplate;

this.ctlSearchResults.DetailConfigurations["ConflictDetailRelation"].Columns["SuggestedRoomName"].CellEditor = cellEditor;

DataTemplate myCellContentTemplate = new DataTemplate();

myCellContentTemplate.VisualTree = new FrameworkElementFactory(typeof(TextBlock));  //????

myCellContentTemplate.VisualTree.SetValue(TextBlock.TextProperty, binding);    //????

this.ctlSearchResults.DetailConfigurations["ConflictDetailRelation"].Columns["SuggestedRoomName"].CellContentTemplate = myCellContentTemplate;

this.ctlSearchResults.ItemsSource = theView;

myCellContentTemplate.VisualTree.SetValue(TextBlock.TextProperty, binding); 

change to

myCellContentTemplate.VisualTree.SetValue(TextBlock.TextProperty, cellbinding ); 

This is Urgent. Pls help. Changing to cellbinding didn't work. Please help. Here is the code -

DataGridCollectionView theView = new DataGridCollectionView(roomsListNew, typeof(ExchangeRoomResource), false, false);

theView.DetailDescriptions.Add(new ParentDetailDescription());

List<ExchangeRoomConflictData> roomsConflictList = new List<ExchangeRoomConflictData>();

roomsConflictList.Add(new ExchangeRoomConflictData(DateTime.Today.AddMonths(1), "Dynamic Data: Room 1"));

roomsConflictList.Add(new ExchangeRoomConflictData(DateTime.Today.AddMonths(2), "Dynamic Data: Room 2"));

roomsConflictList.Add(new ExchangeRoomConflictData(DateTime.Today.AddMonths(3), "Dynamic Data: Room 3"));

Binding binding = new Binding();

binding.Source = roomsConflictList;

DataTemplate myEditorTemplate = new DataTemplate();

myEditorTemplate.VisualTree = new FrameworkElementFactory(typeof(ComboBox));

myEditorTemplate.VisualTree.SetValue(ComboBox.ItemsSourceProperty, binding);

myEditorTemplate.VisualTree.SetValue(ComboBox.SelectedValuePathProperty, "AlternateRoomName");

myEditorTemplate.VisualTree.SetValue(ComboBox.DisplayMemberPathProperty, "AlternateRoomName");

Xceed.Wpf.DataGrid.Markup.CellEditorBindingExtension cellbinding = new Xceed.Wpf.DataGrid.Markup.CellEditorBindingExtension();

myEditorTemplate.VisualTree.SetBinding(ComboBox.SelectedValueProperty, (BindingBase)cellbinding.ProvideValue(null));

CellEditor cellEditor = new CellEditor();

cellEditor.EditTemplate = myEditorTemplate;

this.ctlSearchResults.DetailConfigurations["ConflictDetailRelation"].Columns["SuggestedRoomName"].CellEditor = cellEditor;

Binding cellcontentbinding = new Binding();

cellcontentbinding.Source = roomsConflictList;

cellcontentbinding.Mode = BindingMode.TwoWay;

cellcontentbinding.Path = new PropertyPath("AlternateRoomName");

cellcontentbinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;

DataTemplate myCellContentTemplate = new DataTemplate();

myCellContentTemplate.VisualTree = new FrameworkElementFactory(typeof(TextBlock));

myCellContentTemplate.VisualTree.SetValue(TextBlock.TextProperty, cellcontentbinding);

this.ctlSearchResults.DetailConfigurations["ConflictDetailRelation"].Columns["SuggestedRoomName"].CellContentTemplate = myCellContentTemplate;

this.ctlSearchResults.ItemsSource = theView; // ctlSearchResults is Xceed WPF grid control

Hi Xceed Team,

I am facing the same problem.

Please tell the solution of this problem.