protected virtual void OnDeleteExecuted( object sender, ExecutedRoutedEventArgs e )
{
CancelRoutedEventArgs args = new CancelRoutedEventArgs( DataGridControl.DeletingSelectedItemsEvent, this );
this.OnDeletingSelectedItems( args );
if( args.Cancel )
return;
// Copy the selected item in a temp hashtable.
List<KeyValuePair<DataGridContext, object[]>> selectedItemList = new List<KeyValuePair<DataGridContext, object[]>>();
for( int i = m_selectedContexts.Count - 1; i >= 0; i-- )
{
DataGridContext selectedContext = m_selectedContexts[ i ];
IList<object> sourceSelectedItems = selectedContext.SelectedItems;
object[] clonedSelectedItems = new object[ sourceSelectedItems.Count ];
sourceSelectedItems.CopyTo( clonedSelectedItems, 0 );
selectedItemList.Add( new KeyValuePair<DataGridContext, object[]>( selectedContext, clonedSelectedItems ) );
}
bool raiseItemDeleted = false;
// Delete the selected item
foreach( KeyValuePair<DataGridContext, object[]> keyValuePair in selectedItemList )
{
DataGridContext dataGridContext = keyValuePair.Key;
object[] selectedItems = keyValuePair.Value;
if( ( !dataGridContext.IsDeleteCommandEnabled ) || ( selectedItems.Length == 0 ) )
continue;
DataGridCollectionViewBase dataGridCollectionViewBase =
dataGridContext.ItemsSourceCollection as DataGridCollectionViewBase;
IList list = ( dataGridCollectionViewBase == null )
? ItemsSourceHelper.TryGetIList( dataGridContext.ItemsSourceCollection )
: null; // If we already have a DataGridCollectionView, no need to look for an IList source.
if( ( dataGridCollectionViewBase != null )
|| ( ( list != null ) && DataGridControl.IsRemoveAllowedForDeleteCommand( list ) ) )
{
foreach( object item in selectedItems )
{
bool retry = false;
do
{
try
{
int itemIndex;
if( dataGridCollectionViewBase != null )
{
itemIndex = dataGridCollectionViewBase.IndexOf( item );
if( itemIndex != -1 )
dataGridCollectionViewBase.RemoveAt( itemIndex );
}
else if( list != null )
{
itemIndex = list.IndexOf( item );
if( itemIndex != -1 )
list.RemoveAt( itemIndex );
}
retry = false;
raiseItemDeleted = true;
}
catch( Exception ex )
{
DeletingSelectedItemErrorRoutedEventArgs deletingItemErrorArgs = new DeletingSelectedItemErrorRoutedEventArgs( item, ex, DataGridControl.DeletingSelectedItemErrorEvent, this );
this.OnDeletingSelectedItemError( deletingItemErrorArgs );
switch( deletingItemErrorArgs.Action )
{
case DeletingSelectedItemErrorAction.Abort:
return;
default:
retry = ( deletingItemErrorArgs.Action == DeletingSelectedItemErrorAction.Retry );
break;
}
}
}
while( retry );
}
}
}
if( raiseItemDeleted )
this.OnSelectedItemsDeleted();
}
protected virtual void OnDeletingSelectedItemError( DeletingSelectedItemErrorRoutedEventArgs e )
{
this.RaiseEvent( e );
}