private void handleListFilterType()
{
if (FilterCurrentData.Type == FilterType.List)
{
ComboBox comboBox = this.Template.FindName("PART_ComboBoxFilter", this) as ComboBox;
DataGridComboBoxColumn column = AssignedDataGridColumn as DataGridComboBoxColumn;
if (comboBox != null && column != null)
{
if (DataGridComboBoxExtensions.GetIsTextFilter(column))
{
FilterCurrentData.Type = FilterType.Text;
initControlType();
}
else //list filter type
{
Binding columnItemsSourceBinding = null;
columnItemsSourceBinding = BindingOperations.GetBinding(column, DataGridComboBoxColumn.ItemsSourceProperty);
if (columnItemsSourceBinding == null)
{
System.Windows.Setter styleSetter = column.EditingElementStyle.Setters.First(s => ((System.Windows.Setter)s).Property == DataGridComboBoxColumn.ItemsSourceProperty) as System.Windows.Setter;
if (styleSetter != null)
{
columnItemsSourceBinding = styleSetter.Value as Binding;
}
}
comboBox.DisplayMemberPath = column.DisplayMemberPath;
comboBox.SelectedValuePath = column.SelectedValuePath;
if (columnItemsSourceBinding != null)
{
BindingOperations.SetBinding(comboBox, ComboBox.ItemsSourceProperty, columnItemsSourceBinding);
}
comboBox.RequestBringIntoView
+= new RequestBringIntoViewEventHandler(setComboBindingAndHanldeUnsetValue);
}
}
}
}
private string getValuePropertyBindingPath(DataGridColumn column)
{
string path = String.Empty;
if (column is DataGridBoundColumn)
{
DataGridBoundColumn bc = column as DataGridBoundColumn;
path = (bc.Binding as Binding).Path.Path;
}
else if (column is DataGridTemplateColumn)
{
DataGridTemplateColumn tc = column as DataGridTemplateColumn;
object templateContent = tc.CellTemplate.LoadContent();
if (templateContent != null && templateContent is TextBlock)
{
TextBlock block = templateContent as TextBlock;
BindingExpression binding = block.GetBindingExpression(TextBlock.TextProperty);
path = binding.ParentBinding.Path.Path;
}
}
else if (column is DataGridComboBoxColumn)
{
DataGridComboBoxColumn comboColumn = column as DataGridComboBoxColumn;
path = null;
Binding binding = ((comboColumn.SelectedValueBinding) as Binding);
if (binding == null)
{
binding = ((comboColumn.SelectedItemBinding) as Binding);
}
if (binding == null)
{
binding = comboColumn.SelectedValueBinding as Binding;
}
if (binding != null)
{
path = binding.Path.Path;
}
if (comboColumn.SelectedItemBinding != null && comboColumn.SelectedValueBinding == null)
{
if (path != null && path.Trim().Length > 0)
{
if (DataGridComboBoxExtensions.GetIsTextFilter(comboColumn))
{
path += "." + comboColumn.DisplayMemberPath;
}
else
{
path += "." + comboColumn.SelectedValuePath;
}
}
}
}
return(path);
}