public async Task <IEnumerable <SelectListItem> > GetTreeSubdivisions(string hashIdSelectedValue = null)
{
var treeSubdivisions = await _subdivisionsService.GetTreeSubdivisions();
var subdivision = treeSubdivisions.ToList();
var group = subdivision.Select(m => new SelectListGroup {
Name = m.GroupName
}).ToList();
var items = new List <SelectListItem>();
var j = 0;
for (var i = 0; i < subdivision.Count; i++)
{
for (; j < group.Count;)
{
items.AddRange(subdivision.ElementAt(i).Subdivisions.Select(subdivisionDto => new SelectListItem
{
Value = subdivisionDto.HashIdMain,
Text = subdivisionDto.Name,
Group = group[j],
Selected = subdivisionDto.HashIdMain == hashIdSelectedValue
}));
break;
}
j++;
}
return(items);
}