public IQueryable <TreeViewItem> GetChildren(
int id,
int rootDataItemId = 0,
TreeViewItem.GetCountsType countsType = TreeViewItem.GetCountsType.None)
{
var qry = _dataItemService.GetChildren(id, rootDataItemId);
List <DataItemViewModel> dataItemEntityList = new List <DataItemViewModel>();
List <TreeViewItem> groupNameList = new List <TreeViewItem>();
var groups = qry.OrderBy(g => g.ItemName);
foreach (var group in groups)
{
dataItemEntityList.Add(group);
var treeViewItem = new TreeViewItem();
treeViewItem.Id = group.Id.ToString();
treeViewItem.Name = $"{group.ItemName}({group.ItemCode})";
treeViewItem.IsActive = (group.EnabledMark ?? 0) > 0;
treeViewItem.IconCssClass = "fa fa-sitemap";
if (countsType == TreeViewItem.GetCountsType.ChildGroups)
{
treeViewItem.CountInfo = this._dataItemService.GetAlls().Where(a => a.ParentId.HasValue && a.ParentId == group.Id).Count();
}
groupNameList.Add(treeViewItem);
}
//快速找出哪些项目有子级
List <long> resultIds = dataItemEntityList.Select(a => a.Id).ToList();
var qryHasChildrenList = _dataItemService.GetAlls()
.Where(g =>
g.ParentId.HasValue &&
resultIds.Contains(g.ParentId.Value)).Select(g => g.ParentId.Value)
.Distinct()
.ToList();
foreach (var g in groupNameList)
{
int groupId = g.Id.AsInteger();
g.HasChildren = qryHasChildrenList.Any(a => a == groupId);
}
return(groupNameList.AsQueryable());
}