public static bool AddRecommendation(RECOMMENDATION reco)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<RECOMMENDATION>().Add(reco);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool AddCourseToRecommendation(COURSE course, RECOMMENDATION reco)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var rc = ctx.RECOMMENDATIONs.Include("COURSEs").Where(r => r.ID == reco.ID).FirstOrDefault();
var cs = ctx.COURSEs.Where(c => c.ID == course.ID).FirstOrDefault();
rc.COURSEs.Add(cs);
ctx.Entry(rc).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool UpdateRecommendation(RECOMMENDATION reco)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Entry(reco).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool RemoveCourseFromRecommendation(COURSE course, RECOMMENDATION reco)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.RECOMMENDATIONs.Attach(reco);
ctx.COURSEs.Attach(course);
reco.COURSEs.Remove(course);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static COURSE[] GetCoursesByRecommendation(RECOMMENDATION reco)
{
COURSE[] courses = null;
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
var rc = ctx.RECOMMENDATIONs.Include("COURSEs").Where(r => r.ID == reco.ID).FirstOrDefault();
courses = rc.COURSEs.ToArray();
}
return courses;
}
