public async Task OnGetAsync(string tag = "")
{
long?parentId = null;
if (!string.IsNullOrEmpty(tag))
{
var column = await _columnService.GetOneAsync(new ColumnSearch { IsDeleted = false, Tag = tag });
parentId = column?.Id;
}
Columns = await _columnService.GetListAsync(new ColumnSearch { IsDeleted = false, ParentId = parentId }, "OrderIndex asc");
}