private void EhUseSelectedItemAsVColumns()
{
foreach (var node in _availableColumns.Where(n => n.IsSelected))
{
var colToAdd = node.Tag as IReadableColumn;
if (colToAdd == null)
{
continue;
}
// before adding this node, check that it is not already present
var proxyToAdd = ReadableColumnProxyBase.FromColumn(colToAdd);
if (_valueColumns.Any(n => proxyToAdd.DocumentPath.Equals(((IReadableColumnProxy)n.Tag).DocumentPath)))
{
continue;
}
_valueColumns.Add(new SelectableListNode(colToAdd.FullName, proxyToAdd, false));
}
}