public static void UpdatePropertyGrid(this PropertyGrid pg)
{
var expandedGridItemPaths = new HashSet <string>(
pg
.GetAllGridEntries()
.Cast <GridItem>()
.Where(gi1 => gi1.Expanded)
.Select(gi1 => string.Join("/", gi1.GetHierarchy().Select(gi2 => gi2.Label))));
var allItems = pg.GetAllGridEntries()
.Cast <GridItem>()
.ToList();
var selectedGridItemIndex = allItems.IndexOf(pg.SelectedGridItem);
var selectedGridItemPath = string.Join("/", pg.SelectedGridItem.GetHierarchy().Select(gi2 => gi2.Label));
var view = pg.GetPropertyGridView();
var scrollBar = (ScrollBar)view.GetType().GetField("scrollBar", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(view);
var scroll = scrollBar.Value;
var oldSelected = pg.SelectedObject;
pg.SelectedObject = null;
pg.SelectedObject = oldSelected;
var newExpandableGridItems = new Queue <GridItem>(
pg
.GetAllGridEntries()
.Cast <GridItem>()
.Where(gi => gi.Expandable || gi.GridItems.Count > 0));
bool anySelected = false;
while (newExpandableGridItems.Count > 0)
{
var gi = newExpandableGridItems.Dequeue();
var path = string.Join("/", gi.GetHierarchy().Select(gi1 => gi1.Label));
if (expandedGridItemPaths.Contains(path))
{
gi.Expanded = true;
}
if (path == selectedGridItemPath)
{
gi.Select();
anySelected = true;
}
foreach (var child in gi.GridItems.Cast <GridItem>())
{
newExpandableGridItems.Enqueue(child);
}
}
if (!anySelected)
{
var allItems2 = pg.GetAllGridEntries()
.Cast <GridItem>()
.ToList();
var index = Math.Min(selectedGridItemIndex, allItems2.Count);
allItems2[index].Select();
}
scrollBar.Value = scroll;
}
