private async Task UpdateNodesAsync()
{
var oldNodesVisible = CollectionsVisible;
try
{
UI = await TreeService.GetNodesAsync(CollectionAlias, ParentPath, _pageNr, PageSize);
if (UI == null)
{
return;
}
CollectionsVisible = UI.Nodes.ToDictionary(x => x.Id, x => x.DefaultOpenCollections);
// restore the view state with the new nodes
if (oldNodesVisible != null)
{
foreach (var node in oldNodesVisible.Where(x => x.Value))
{
if (CollectionsVisible.ContainsKey(node.Key))
{
CollectionsVisible[node.Key] = true;
}
}
}
}
catch (Exception ex)
{
Error = ex.Message;
}
StateHasChanged();
}