private TreeNode _fastRemoveNodes(MultiSelectTreeViewDoEvents treeView, int removeNodesCount, IEnumerable <TreeNode> removeNodes)
{
TreeNode nextNode = null;
if (treeView.Nodes.Count == removeNodesCount)
{
_fastClearNodes(treeView);
}
else
{
var removeNodesIndexes = _createSortNodeIndexs(removeNodes);
var lastRemoveNodeIndex = removeNodesIndexes.Count == 0 ? -1 : removeNodesIndexes[0];
nextNode = _getNextTreeNode((lastRemoveNodeIndex > -1 && lastRemoveNodeIndex < treeView.Nodes.Count) ? treeView.Nodes[lastRemoveNodeIndex] : null);
if (_availableSubstitute(removeNodesCount))
{
var nodes = _createTreeNodeArray(treeView, removeNodesIndexes, nextNode?.Index ?? -1, out nextNode);
var newTreeView = _substituteTreeView(treeView);
newTreeView.Nodes.AddRange(nodes);
_switchTreeViews(treeView, newTreeView);
}
else
{
treeView.BeginUpdate();
foreach (var removeNodesIndex in removeNodesIndexes.Where(removeNodesIndex => (removeNodesIndex > -1) && (removeNodesIndex < treeView.Nodes.Count)))
{
treeView.Nodes.RemoveAt(removeNodesIndex);
}
treeView.EndUpdate();
}
}
return(nextNode);
}
private static void _RemoveTreeView(MultiSelectTreeViewDoEvents treeView)
{
if (!treeView.IsDisposed)
{
var action = new Action(() =>
{
treeView.Parent = null;
treeView.Size = new Size(1, 1);
treeView.BeginUpdate();
while (treeView.Nodes.Count != 0)
{
treeView.RemoveAt(treeView.Nodes.Count - 1);
}
treeView.EndUpdate();
treeView.Dispose();
GC.Collect();
});
try
{
if (treeView.InvokeRequired)
{
treeView.Invoke(() => action());
}
else
{
action();
}
}
catch (Exception)
{ }
}
}