private List <TreeNode> SortNodes(SortColumnDescriptions sortColumnDescriptions, SortComparers sortComparers)
{
var list = nodeList;
IOrderedEnumerable <TreeNode> source = null;
for (int i = 0; i < sortColumnDescriptions.Count; i++)
{
var sortDescription = sortColumnDescriptions[i];
var customComparer = sortComparers[sortDescription.ColumnName];
if (sortDescription.SortDirection == ListSortDirection.Ascending)
{
if (i == 0)
{
if (customComparer == null)
{
source = list.OrderBy(node => TreeGridHelper.GetValue(node.Item, sortDescription.ColumnName));
}
else
{
source = list.OrderBy(node => node.Item, customComparer);
}
}
else
{
if (customComparer == null)
{
source = source.ThenBy(node => TreeGridHelper.GetValue(node.Item, sortDescription.ColumnName));
}
else
{
source = source.ThenBy(node => node.Item, customComparer);
}
}
}
else
{
if (i == 0)
{
if (customComparer == null)
{
source = list.OrderByDescending(node => TreeGridHelper.GetValue(node.Item, sortDescription.ColumnName));
}
else
{
source = list.OrderByDescending(node => node.Item, customComparer);
}
}
else
{
if (customComparer == null)
{
source = source.ThenByDescending(node => TreeGridHelper.GetValue(node.Item, sortDescription.ColumnName));
}
else
{
source = source.ThenByDescending(node => node.Item, customComparer);
}
}
}
}
return(source.ToList());
}
internal void Sort(SortColumnDescriptions descriptions, SortComparers comparers)
{
nodeList = SortNodes(descriptions, comparers);
}