public ActionResult WithoutChain()
{
var parentCourseTCs = CourseChainService.GetAll().Select(x => x.Course_TC)
.Distinct().ToList();
return(CourseTable("Курсы без цепочек", c =>
!parentCourseTCs.Contains(c.ParentCourse_TC)));
}
public List <string> GetNextCourseTCs(List <string> parentCourseTCs)
{
var nextCourseTCList = CourseChainService.GetAll()
.Where(cc => parentCourseTCs.Contains(cc.Course_TC))
.OrderBy(cc => cc.SortOrder)
.Select(cc => new { cc.NextCourse_TC, cc.SortOrder })
.ToList().Distinct(x => x.NextCourse_TC)
.OrderBy(x => x.SortOrder).Select(x => x.NextCourse_TC).ToList();
return(nextCourseTCList);
}