下面我有两个类的构造函数。学生与课程
我正在尝试将 Student 类的 _completedCourses value 的值与 Course 类的 coursecode 进行比较。
_completedCourses 是课程及其成绩的字典。我正在尝试查找哪门课程未完成并打印该列表。
我的做法正确吗?
public Course(string coursName, string courseCode, char passingGrade, double noOfCredits, Semester semesterOfferd, int major)
{
this.CourseName = coursName;
this.CourseCode = courseCode;
this.PassingGrade = passingGrade;
this.NoOfCredits = noOfCredits;
this.SemesterOfferd = semesterOfferd;
this.prerequisiteCourses = new List<Course>();
this._enrolledStudents = new List<Student>();
this._major = major;
}
public Student(int studentID, string studentName, Status studentStatus, StudentMajor studentMajor)
{
this._studentID = studentID;
this._studentName = studentName;
this._studentStatus = studentStatus;
this._studentMajor = studentMajor;
this._course = new Course();
this._completedCourses = new Dictionary<string, char>();
countStudent++;
}
public void RemainingCourses()
{
var cKey = _completedCourses.ContainsKey(_course.CourseCode);
Console.WriteLine("Remaining Courses");
if (cKey.Equals(_course.CourseCode))
{
foreach (KeyValuePair<string, char> count in _completedCourses)
{
{
{
Console.WriteLine(count.Key + " " + count.Value);
// Console.WriteLine("Course " + count.Value);
count.ToString();
}
}
}
}
}
更新!!!
我的驱动程序类中的以下代码行实现了我想要的
Console.WriteLine("Enter Student ID ");
input = Convert.ToInt32(Console.ReadLine());
Console.Clear();
if (input.Equals(id.StudentID)) {
id.DisplayCompletedCourse();
foreach (var sub in isdCourses) {
var cKey = id.CompletedCourses.ContainsKey(sub.CourseCode);
if (!cKey)
{
Console.WriteLine(sub.CourseCode);
}
}
}
ContainsKey
方法返回一个布尔值(true/false),因此在您的 if 条件中:
if (cKey.Equals(_course.CourseCode))
cKey
是一个布尔值,但 _course.CourseCode
是一个字符串,所以这永远不会是 true,因此这永远不会进入 if 块内。
尝试像这样重写:
public void RemainingCourses()
{
var cKey = _completedCourses.ContainsKey(_course.CourseCode);
Console.WriteLine("Remaining Courses");
if (cKey) // if cKey is "true", then the dictionary contains the CourseCode
{
foreach (KeyValuePair<string, char> count in _completedCourses)
{
Console.WriteLine(count.Key + " " + count.Value);
}
}
}
顺便说一句,请注意格式,您添加了不必要的花括号。另外,这可以使用 linq 进行简化,但我使其尽可能接近原始代码。