//-----------------------------
// Miscellaneous other methods.
//-----------------------------
public bool VerifyCompletion(Course c)
{
bool outcome = false;
// Step through all TranscriptEntries, looking for one
// which reflects a Section of the Course of interest.
foreach (TranscriptEntry te in TranscriptEntries)
{
Section s = te.Section;
if (s.IsSectionOf(c))
{
// Ensure that the grade was high enough.
if (TranscriptEntry.PassingGrade(te.Grade))
{
outcome = true;
// We've found one, so we can afford to
// terminate the loop now.
break;
}
}
}
return(outcome);
}
//************************************************
//
public bool PostGrade(Student s, string grade)
{
// Make sure that we haven't previously assigned a
// grade to this Student by looking in the Dictionary
// for an entry using this Student as the key. If
// we discover that a grade has already been assigned,
// we return a value of false to indicate that
// we are at risk of overwriting an existing grade.
// (A different method, EraseGrade(), can then be written
// to allow a Professor to change his/her mind.)
if (AssignedGrades.ContainsKey(s) == true)
{
return(false);
}
// First, we create a new TranscriptEntry object. Note
// that we are passing in a reference to THIS Section,
// because we want the TranscriptEntry object,
// as an association class ..., to maintain object
// references on the Section as well as on the Student.
// (We'll let the TranscriptEntry constructor take care of
// "hooking" this T.E. to the correct Transcript.)
TranscriptEntry te = new TranscriptEntry(s, grade, this);
// Then, we add the TranscriptEntry and its associated
// Student to the AssignedGrades Dictionary.
AssignedGrades.Add(s, te);
return(true);
}
//******************************************
//创建修改成绩的方法,先删除指定的学生成绩在添加新的成绩
public bool EraseGrade(Student s, string grade)
{
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades.Remove(s);
AssignedGrades.Add(s, te);
return(true);
}
//µÚ6Ìâ Ð޸ijɼ¨
public void EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == true)
{
AssignedGrades.Remove(s);
TranscriptEntry tr = new TranscriptEntry(s, grade, this);
AssignedGrades.Add(s, tr);
}
}
//题6：创建一个EraseGrade
public bool EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == false)
{
return(false);
}
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades[s] = te;
return(true);
}
//****************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
foreach (var e in TranscriptEntries)
{
if (e.Student.Equals(te.Student) && e.Section.Equals(te.Section))
{
e.Grade = te.Grade;
return;
}
}
TranscriptEntries.Add(te);
}
//****************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
foreach (var e in TranscriptEntries)
{
if (e.Student.Equals(te.Student) && e.Section.Equals(te.Section))
{
e.Grade = te.Grade;
return;
}
}
TranscriptEntries.Add(te);
}
//****************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
//�����⣬�ijɼ���Ӧ�ڴ˴������жϣ���ֹʵ����TranscriptEntry ֱ�������һ�γɼ�
foreach (var e in TranscriptEntries)
{
if (e.Student.Equals(te.Student) && e.Section.Equals(te.Section))
{
e.Grade = te.Grade;
return;
}
}
TranscriptEntries.Add(te);
}
//****************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
//第六题，修改成绩，应在此处增加判断，防止实例化TranscriptEntry 直接又添加一次成绩
foreach (var e in TranscriptEntries)
{
if (e.Student.Equals(te.Student) && e.Section.Equals(te.Section))
{
e.Grade = te.Grade;
return;
}
}
TranscriptEntries.Add(te);
}
//************************************************
//
public bool PostGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == true)
{
return(false);
}
TranscriptEntry te = new TranscriptEntry(s, grade, this);
// Then, we add the TranscriptEntry and its associated
// Student to the AssignedGrades Dictionary.
AssignedGrades.Add(s, te);
return(true);
}
//第六题
public bool EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s))
{
AssignedGrades.Remove(s);
//把旧的成绩删掉，添加新成绩。
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades.Add(s, te);
//s.AddSection(this);
return(true);
}
else
{
return(false);
}
}
//*************************************************************
// This method returns the value null if the Student has not
// been assigned a grade.
//
public string GetGrade(Student s) {
string grade = null;
// Only continue if the AssignedGrades Dictionary
// contains the Student as a key.
if ( AssignedGrades.ContainsKey(s) == true ) {
// Retrieve the Student's transcript entry object, if one
// exists, and in turn retrieve its assigned grade.
// If we found no TranscriptEntry for this Student, return
// a null value to signal this.
TranscriptEntry te = AssignedGrades[s];
if (te != null) {
grade = te.Grade;
}
}
return grade;
}
//��ϰ6���ijɼ�
public void EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == true)
{
s.Transcript.TranscriptEntries.Remove(AssignedGrades[s]);
AssignedGrades.Remove(s);
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades.Add(s, te);
}
}
//����EraseGrade�����ijɼ�
public bool EraseGrade(Student s, string grade)
{
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades.Remove(s);
AssignedGrades.Add(s, te);
return true;
}
//************************************************
//
public bool PostGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == true)
{
return false;
}
TranscriptEntry te = new TranscriptEntry(s, grade, this);
// Then, we add the TranscriptEntry and its associated
// Student to the AssignedGrades Dictionary.
AssignedGrades.Add(s, te);
return true;
}
//***************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
TranscriptEntries.Add(te);
}
//��ϰ14.6���ijɼ�
public void EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == true)
{
AssignedGrades.Remove(s);
//�Ƴ�ָ��ѧ���ɼ�
TranscriptEntry tr = new TranscriptEntry(s, grade, this);
AssignedGrades.Add(s, tr);
}
}
//������
public bool EraseGrade(Student s,string grade)
{
if (AssignedGrades.ContainsKey(s))
{
AssignedGrades.Remove(s);
//�Ѿɵijɼ�ɾ�������³ɼ���
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades.Add(s, te);
//s.AddSection(this);
return true;
}
else { return false;
}
}
//��6�������ܹ��ijɼ�
public bool EraseGrade(Student s, string grade)
{
if (AssignedGrades.ContainsKey(s) == false)
{
return false;
}
TranscriptEntry te = new TranscriptEntry(s, grade, this);
AssignedGrades[s] = te;
return true;
}
//**************************************
//
public bool PostGrade(Student s, string grade)
{
// Make sure that we haven't previously assigned a
// grade to this Student by looking in the Dictionary
// for an entry using this Student as the key. If
// we discover that a grade has already been assigned,
// we return a value of false to indicate that
// we are at risk of overwriting an existing grade.
// (A different method, EraseGrade(), can then be written
// to allow a Professor to change his/her mind.)
if (AssignedGrades.ContainsKey(s) == true)
{
if (AssignedGrades[s] != null)
{
return false;
}
}
// First, we create a new TranscriptEntry object. Note
// that we are passing in a reference to THIS Section,
// because we want the TranscriptEntry object,
// as an association class ..., to maintain object
// references on the Section as well as on the Student.
// (We'll let the TranscriptEntry constructor take care of
// "hooking" this T.E. to the correct Transcript.)
TranscriptEntry te = new TranscriptEntry(s, grade, this);
// Then, we add the TranscriptEntry and its associated
// Student to the AssignedGrades Dictionary.
AssignedGrades.Add(s, te);
return true;
}
//***************************************************
//
public void AddTranscriptEntry(TranscriptEntry te)
{
TranscriptEntries.Add(te);
}
