List<string> GetImagePaths(string folder)
{
List<string> filePaths = new List<string>();
try
{
files = Directory.GetFiles(folder);
}
catch (DirectoryNotFoundException ex)
{
}
foreach(string file in files)
{
if (file.ToUpper().EndsWith(".JPG") ||
file.ToUpper().EndsWith(".PNG") ||
file.ToUpper().EndsWith(".GIF") ||
file.ToUpper().EndsWith(".TIF"))
{
filePaths.Add(file);
}
}
filePaths.TrimExcess();
return filePaths;
}
private void UpdateChildren( DataGridContext dataGridContext, TableViewColumnVirtualizationManager columnVirtualizationManager, VirtualizingCellCollection parentRowCells )
{
//Prevent reentrance
if( m_parentRowCells.AlreadyUpdating )
return;
m_parentRowCells.AlreadyUpdating = true;
if( dataGridContext == null )
throw new DataGridInternalException( "DataGridContext is null for FixedCellPanel" );
if( columnVirtualizationManager == null )
throw new DataGridInternalException( "ColumnVirtualizationManager is null for FixedCellPanel" );
if( parentRowCells == null )
return;
this.ClearPermanentScrollingFieldNames();
List<string> currentFieldsName = new List<string>();
currentFieldsName.AddRange( columnVirtualizationManager.FixedFieldNames );
currentFieldsName.AddRange( columnVirtualizationManager.ScrollingFieldNames );
HashSet<Cell> unusedCells = new HashSet<Cell>( parentRowCells.BindedCells );
//Idenfity the binded cells that aren't needed anymore.
foreach( string fieldName in currentFieldsName )
{
ColumnBase column = dataGridContext.Columns[ fieldName ];
Cell cell;
if( parentRowCells.TryGetCell( column, out cell ) )
{
//Certain non recyclable cells like StatCells need their content binding to be updated when they become (or stay) in view.
cell.AddContentBinding();
unusedCells.Remove( cell );
}
}
currentFieldsName.Clear();
currentFieldsName.TrimExcess();
//Release the unused binded cells now in order to minimize the number of cell's creation.
foreach( Cell cell in unusedCells )
{
bool release = this.CanReleaseCell( cell );
//We move the unused cell into the scrolling panel since there is more chance it will be reused there in the future.
this.MoveCellToScrollingPanel( cell, release );
if( release )
{
parentRowCells.Release( cell );
}
//Since the cell cannot be released, it will not be collapsed. We must keep the field name in order to let the scrolling sub-panel measure and arrange the cell out of view.
else
{
//Certain non recyclable cells like StatCells needs their content binding to be removed when they become out of view.
cell.RemoveContentBinding();
this.AddPermanentScrollingFieldNames( cell.FieldName );
}
}
unusedCells.Clear();
unusedCells.TrimExcess();
//Add the missing cells to the fixed region.
foreach( string fieldName in columnVirtualizationManager.FixedFieldNames )
{
//The cell is created if it is missing.
Cell cell = parentRowCells[ fieldName ];
//Make sure the cell is in the appropriate panel.
this.MoveCellToFixedPanel( cell );
}
//Add the missing cells to the scrolling region.
foreach( string fieldName in columnVirtualizationManager.ScrollingFieldNames )
{
//The cell is created if it is missing.
Cell cell = parentRowCells[ fieldName ];
//Make sure the cell is in the appropriate panel.
this.MoveCellToScrollingPanel( cell );
}
if( m_clearUnusedCellsDispatcherOperation == null )
{
m_clearUnusedCellsDispatcherOperation = this.Dispatcher.BeginInvoke( new Action( this.ClearUnusedCells ), DispatcherPriority.ApplicationIdle );
}
m_fixedPanel.InvalidateMeasure();
m_scrollingCellsDecorator.InvalidateMeasure();
m_scrollingPanel.InvalidateMeasure();
m_parentRowCells.AlreadyUpdating = false;
}