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 AddCategory(CATEGORY category)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<CATEGORY>().Add(category);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
/// <summary>
/// 创建新的ManagerType，注意ManagerType和Type在当前语义下表示意义相同，均表示Manager的类型
/// </summary>
/// <param name="type">需要创建的Type，需要在函数外部创建实例，并且为DESCRIPTION属性赋值</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool AddManagerType(TYPE type)
{
int count = 0;
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.TYPEs.Add(type);
count = ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return count == 1;
}
/// <summary>
/// 创建新的Permission
/// </summary>
/// <param name="permission">需要创建的Manager，需要在函数外部创建实例，并且为NAME和TYPE属性赋值</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool AddPermission(PERMISSION permission)
{
int count = 0;
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.PERMISSIONs.Add(permission);
count = ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return count == 1;
}
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;
}
/// <summary>
/// 移除TYPE。如果有Manager与该TYPE相关联，则该Manager的MNGR_TYPE将会为NULL
/// </summary>
/// <param name="type_id">被删除的TYPE的id</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool RemoveManagerType(int type_id)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var type = ctx.TYPEs.Where(m => m.ID == type_id).FirstOrDefault<TYPE>();
ctx.Set<TYPE>().Remove(type);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
//throw new Exception("Not Support Yet");
}
public static bool RemoveManager(int manager_id)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var manager = ctx.MANAGERs.Where(m => m.ID == manager_id).FirstOrDefault<MANAGER>();
ctx.Set<MANAGER>().Remove(manager);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
private static bool AddResourcesToLesson(RESOURCE[] res, LESSON lesson)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
var ls = ctx.LESSONs.Include("RESOURCEs").Where(l => l.ID == lesson.ID).FirstOrDefault();
foreach (RESOURCE rs in res)
ls.RESOURCEs.Add(rs);
ctx.Entry(ls).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
return true;
}
/// <summary>
/// 用于更改TYPE的一般信息，包括DESCRIPTION
/// </summary>
/// <param name="type">更改后的TYPE的实例</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool UpdateManagerType(TYPE type)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Entry(type).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool ToggleNoteSharability(NOTE note)
{
note.SHARE = !note.SHARE;
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<NOTE>().Attach(note);
ctx.Entry(note).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool RemoveResource(RESOURCE resource)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<RESOURCE>().Attach(resource);
ctx.Set<RESOURCE>().Remove(resource);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool RemoveLesson(LESSON lesson)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<LESSON>().Attach(lesson);
ctx.Set<LESSON>().Remove(lesson);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
public static bool RemoveDocument(DOCUMENT document)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Set<DOCUMENT>().Attach(document);
ctx.Set<DOCUMENT>().Remove(document);
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 bool RemovePermission(int permission_id)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var permission = ctx.PERMISSIONs.Where(m => m.ID == permission_id).FirstOrDefault<PERMISSION>();
ctx.Set<PERMISSION>().Remove(permission);
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
/// <summary>
/// 回收授予某Manager的权限
/// </summary>
/// <param name="manager_id">被回收的Manager的ID</param>
/// <param name="permission_id">被回收的Permission的ID</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool RevokePermissionFromManager(int manager_id, int permission_id)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var manager = ctx.MANAGERs.Include("PERMISSIONs").Where(mngr => mngr.ID == manager_id).FirstOrDefault<MANAGER>();
var perm = ctx.PERMISSIONs.Where(p => p.ID == permission_id).FirstOrDefault<PERMISSION>();
//System.Diagnostics.Debug.WriteLine(ctx.Entry(manager).State);
//System.Diagnostics.Debug.WriteLine(ctx.Entry(perm).State);
manager.PERMISSIONs.Remove(perm);
ctx.Entry(manager).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
/// <summary>
/// 用于更新课程的状态，状态包括Pending、OK、Cancel三项
/// </summary>
/// <param name="course_id">课程的ID</param>
/// <param name="state">课程的状态，类型为枚举CourseStatus</param>
/// <returns>true表示成功，false表示失败</returns>
public static bool UpdateCourseStatus(int course_id, CourseStatus state)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
COURSE course = ctx.COURSEs.Where(c => c.ID == course_id).FirstOrDefault();
course.COURSE_STATUS = state.ToString();
ctx.Entry(course).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
/// <summary>
/// 用于更改Permission的一般信息，包括NAME和TYPE
/// </summary>
/// <param name="permission">更改后的Permission的实例</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool UpdatePermission(PERMISSION permission)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
ctx.Entry(permission).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;
}
/// <summary>
/// 用于更改Manager的Type
/// </summary>
/// <param name="manager">需要更改的Manager的实例</param>
/// <param name="type">需要改为的Type的ID</param>
/// <returns>true表示成功创建，false表示失败</returns>
public static bool ChangeManagerManagerType(MANAGER manager, int type)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
manager.MNGR_TYPE = type;
ctx.Entry(manager).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
//throw new Exception("Not Support Yet");
}
private static bool AddLessonsToCourse(LESSON[] lessons, COURSE course)
{
using (CloudEDUEntities ctx = new CloudEDUEntities())
{
try
{
var cs = ctx.COURSEs.Include("LESSONs").Where(c => c.ID == course.ID).FirstOrDefault();
foreach (LESSON ls in lessons)
cs.LESSONs.Add(ls);
ctx.Entry(cs).State = System.Data.EntityState.Modified;
ctx.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.ToString());
return false;
}
}
return true;
}
