private void DatePicker_SelectedDateChanged(object sender, SelectionChangedEventArgs e)
{
bool wasDatePickerDataContextNull = false;
DatePicker datePicker = sender as DatePicker;
if (datePicker != null && datePicker.DataContext == null)
{
wasDatePickerDataContextNull = true;
datePicker.DataContext = datePickerDataContext;
}
if (datePicker != null && datePicker.DataContext != null &&
columnForCellBeingEdited != null && columnForCellBeingEdited != "")
{
try
{
if (!e.AddedItems[0].Equals(datePicker.DataContext.GetType().GetProperty(columnForCellBeingEdited).GetValue(datePicker.DataContext, null)))
{
DataSourceCreator.SetProperty(e.AddedItems[0], datePicker.DataContext,
datePicker.DataContext.GetType().GetProperty(columnForCellBeingEdited));
Graphic correspondingGraphic = DataSourceCreator.GetGraphicSibling(datePicker.DataContext);
if (correspondingGraphic != null &&
correspondingGraphic.Attributes.ContainsKey(columnForCellBeingEdited))
{
// Unsubscribing from graphic's AttributeValueChanged event to manually refresh corresponding row:
correspondingGraphic.AttributeValueChanged -= Graphic_AttributeValueChanged;
DateTime?selectedDate = e.AddedItems[0] as DateTime?;
DateTime?dateToSet = null;
if (selectedDate != null)
{
dateToSet = new DateTime(selectedDate.Value.Ticks, selectedDate.Value.Kind);
}
correspondingGraphic.Attributes[columnForCellBeingEdited] = dateToSet;
if (wasDatePickerDataContextNull)
{
correspondingGraphic.RefreshRow(ItemsSource, GetGraphicIndexInGraphicsCollection(correspondingGraphic), objectType);
datePickerDataContext = null;
}
// Subscribing back to the graphic's AttributeValueChanged event:
correspondingGraphic.AttributeValueChanged += Graphic_AttributeValueChanged;
}
}
}
catch { }
}
}
public void RefreshRow(Graphic graphic)
{
#if SILVERLIGHT
int idx = GetGraphicIndexInGraphicsCollection(graphic);
IList gridRows = ItemsSource.AsList();
if (idx > -1 && idx < gridRows.Count)
{
try
{
// In Silverlight refreshing a row corresponding to a graphic causes to lose current selection.
// Preserving index of currently selected items in the FeatureDataGrid:
int selCount = SelectedItems.Count;
int[] selIndexes = new int[selCount];
for (int i = 0; i < selCount; i++)
selIndexes[i] = GetRowIndexInRowsCollection(SelectedItems[i]);
// Unsubscribe from PagedCollectionView CollectionChanged event to perform a manual source
// collection update:
(ItemsSource as PagedCollectionView).CollectionChanged -= PagedCollectionView_CollectionChanged;
graphic.RefreshRow((ItemsSource as ICollectionView).SourceCollection, idx, objectType);
gridRows = ItemsSource.AsList(); // Refresh needed as a row in the ItemsSource has changed
// Subscribing back to the PagedCollectionView CollectionChanged event handler:
(ItemsSource as PagedCollectionView).CollectionChanged += PagedCollectionView_CollectionChanged;
// Restoring the selection stored before updating the row (Silverlight only):
SelectedItems.Clear();
for (int i = 0; i < selCount; i++)
SelectedItems.Add(gridRows[selIndexes[i]]);
}
catch (Exception ex)
{
throw new ArgumentException(string.Format(Properties.Resources.FeatureDataGrid_RowUpdateFailed, idx.ToString()), ex);
}
}
#endif
}
