public List <List <String> > getPrecourse(String courseName)
{
List <List <String> > preCourseSet = new List <List <String> >();
if (!CourseNameApi.existsByCourseName(courseName))
{
return(null);
}
else
{
List <String> temp = getPrecouseName(courseName);
List <String> temp1 = new List <String>();
List <String> temp2 = new List <String>();
preCourseSet.Add(temp);
foreach (String i in temp)
{
temp1 = getPrecouseName(i);
foreach (String j in temp1)
{
if (!temp2.Contains(j))
{
temp2.Add(j);
}
}
}
preCourseSet.Add(temp2);
}
return(preCourseSet);
}
public List <String> getPrecouseName(String courseName)
{
if (!CourseNameApi.existsByCourseName(courseName))
{
return(null);
}
else
{
int?couseId = CourseNameApi.findByCourseName(courseName).courseNameID;
List <CourseRelation> courseRelations = CourseRelationApi.findByCourseNameID(couseId);
return(getCoursesName(courseRelations));
}
}