DataGridComboboxColumn - Get cell value - wpf

Question

The task is the following: there is a DataGrid with ComboboxColumns. If user changes cell[2,3] and selected value!=0 then disable cell[3,2]. I wrote the following Handler:
private void grAssessment_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
int x = e.Column.DisplayIndex;
int y = e.Row.GetIndex();
grAssessment.GetCell(x, y).IsEnabled = false;
grAssessment.GetCell(x, y).Background = Brushes.LightGray;
}
But it disables appropriate cell in anyway. How to add selected value!=0 condition to this code?
Thanks in advance.

Answer 1

Try to check this out:
1. DataGridComboBoxColumn ItemsSource (for current version only, use your own):
private ObservableCollection<ScoreData> _scores = new ObservableCollection<ScoreData>(
new List<ScoreData>
{
new ScoreData{Score = 1, ScoreVerbal = "the same"},
new ScoreData{Score = 3, ScoreVerbal = "moderate superiority"},
new ScoreData{Score = 5, ScoreVerbal = "strong superiority"},
new ScoreData{Score = 7, ScoreVerbal = "the samvery strong superioritye"},
new ScoreData{Score = 9, ScoreVerbal = "extremely superiority"},
} );
2. Handler code (the handler defined on the data grid):
private void SelectDataGrid_OnCellEditEnding(object sender,
DataGridCellEditEndingEventArgs e)
{
var editingElement = e.EditingElement as Selector;
if(editingElement == null) return;
var selectedData = editingElement.SelectedItem as ScoreData;
if(selectedData == null || selectedData.Score > 1) return;
var dataGridCell = editingElement.GetVisualParentOfType<DataGridCell>();
if(dataGridCell == null) return;
dataGridCell.IsEnabled = false;
}
3. GetVisualParentOfType code (as part of extension class):
public static class VisualTreeExtensions
{
public static T GetVisualParentOfType<T>(this DependencyObject child)
where T : DependencyObject
{
if (child is T)
return child as T;
var parentObject = VisualTreeHelper.GetParent(child);
if (parentObject == null) return null;
var parent = parentObject as T;
return parent ?? GetVisualParentOfType<T>(parentObject);
}
public static T GetChildOfType<T>(this DependencyObject depObj)
where T : DependencyObject
{
if (depObj == null) return null;
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
var child = VisualTreeHelper.GetChild(depObj, i);
var result = (child as T) ?? GetChildOfType<T>(child);
if (result != null) return result;
}
return null;
}
}
regards,

Answer 2

I found the following solution
private void grAssessment_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
int x = e.Column.DisplayIndex;
int y = e.Row.GetIndex();
DataGridCell cell = grAssessment.GetCell(y, x);
if (((System.Windows.Controls.ComboBox)(cell.Content)).Text != "")
{
grAssessment.GetCell(x, y).IsEnabled = false;
grAssessment.GetCell(x, y).Background = Brushes.LightGray;
}
else
{
grAssessment.GetCell(x, y).IsEnabled = true;
grAssessment.GetCell(x, y).Background = Brushes.White;
}
}