Question

我有一个学生名单和一个商标名单。我想根据输入的ID添加学生标记，然后查看记录。我没有正确实现它。有人可以告诉我如何正确地做到这一点吗？这是我想要实现的输出： 1）加入学生 2）添加标记：将要求用户输入id，如果存在，则根据id，然后根据该id存储标记。 3）查看标记：查看学生ID和他的标记

class Student
{     
    public Student(string name, string surname, string dob, string address)
    {
        this.Name = name;
        this.Surname = surname;
        this.DOB = dob;
        this.Address = address;
    }

    public List<Marks> studentId = new List<Marks>();
    public List<Marks> Mathematics = new List<Marks>();
    public List<Marks> English = new List<Marks>();
    public List<Marks> Maltese = new List<Marks>();
    public List<Marks> ReligiousStudies = new List<Marks>();
    public List<Marks> SocialStudies = new List<Marks>();

    public string Name { get; set; }
    public string Surname { get; set; }
    public string DOB { get; set; }
    public string Addr { get; set; }
    public string Id { get; set; }

    public Student(string s)
    {
        string[] splitted = s.Split(',');
        name = splitted[0];
        surname = splitted[1];
        dob = splitted[2];
        address = splitted[3];
        id = splitted[4];          
     }

    public void AddMarks(string id, int hyexam, int anexam)
    {
        if (Id.Equals(id))
        {
            studentId.Add(new Marks(id));
            Mathematics.Add(new Marks(hyexam, anexam));
            English.Add(new Marks(hyexam, anexam));
            Maltese.Add(new Marks(hyexam, anexam));
            ReligiousStudies.Add(new Marks(hyexam, anexam));
            SocialStudies.Add(new Marks(hyexam, anexam));
        }
        else
        {
            Console.WriteLine("id not found");
        }
    }

    public void StudMarks()
    {
        foreach (Marks mrk in studentId)
        {
            Console.WriteLine(mrk);
        }
        foreach (Marks mrk in Mathematics)
        {
            Console.WriteLine(mrk);
        }

        foreach (Marks mrk in English)
        {
            Console.WriteLine(mrk);
        }

        foreach (Marks mrk in Maltese)
        {
            Console.WriteLine(mrk);
        }

        foreach (Marks mrk in ReligiousStudies)
        {
            Console.WriteLine(mrk);
        }            
     }           
   }
}

public class ClassYear 
{               
    private const string filestud = "C:\\Users\\Maria\\Desktop\\Students\\stud.txt";    
    public string Year { get; set; }
    public List<Student> mystudent=new List <Student> ();
    public List<Student> MyStud
    {
        get { return mystudent; }
    }

    public void Addstudent(string name,string surname,string dob, string addr)
    {
        mystudent.Add(new Student(name,surname,dob,addr));                   
    }

    private void LoadFromFile()
    {
        try
        {
            string s;
            StreamReader myFile = File.OpenText(filestud);
            while ((s = myFile.ReadLine()) != null)
            {
                Student st = new Student(s);
                mystudent.Add(st);
            }
            myFile.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine("There was a file handling problem");
        }
    }

    private void DumpToFile()
    {
        try
        {
            StreamWriter myFile = File.CreateText(filestud);
            foreach (Student s in mystudent)
            {
                myFile.WriteLine(s.ToString());
            }
            myFile.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine("There was a file handling problem");
        }
    }

    private int SearchItem(int search)
    {
        int found = -1;
        if (mystudent != null)
        {
            foreach (Student st in mystudent)
            {
                found++;
                if (Student.Equals(search,st)) {
                    break;
                }
            }
        }
        return found;
    }

    private void Delete(int index)
    {
        SearchItem(index);
        mystudent.RemoveAt(index);
        foreach (Student st in mystudent) {
            Console.WriteLine(st);
        }            
    }

    private void EditItem(int index)        
    {
        Student stud = new Student();        
        SearchItem(index);
        mystudent[index] = stud;
        Console.WriteLine("current record is" + index);
        Console.WriteLine("enter new record:");
        stud.Name = Console.ReadLine();
        stud.Surname = Console.ReadLine();
        stud.Addr = Console.ReadLine();
        stud.Id = Console.ReadLine();
        foreach (Student st in mystudent)
        {
            Console.WriteLine(st);
        }
    }
    private void ViewStudents()
    {
        foreach (Student st in mystudent)
        {
            Console.WriteLine(st);
        }
    }                    
 }  
 }

public class Marks
{      
    public int HYEXAM { get; private set; }
    public int ANEXAM { get; private set; }
    public string Id { get; private set; }

    public Marks(int hyexam, int anexam)
    {          
        this.HYEXAM = hyexam;
        this.ANEXAM = anexam;
    }

    public Marks(string id)
    {
        this.Id = id;
    }

    public double OverallExam()
    {
        return (0.4 * HEYXAM) + (0.6 * ANEXAM);
    }
   }
 }

Answer 1

好的，据我所知，你有一份学生名单。这些学生中的每一个都有几个标记列表：数学，英语，马耳他语等。

因此，假设您要为某个学生添加数学标记。假设你有：

List<Student> students;
int userId; // the id entered by the user
Mark mathMark; // the mark you want to add

在列表中搜索给定的ID：

foreach (Student myStudent in students)
{
    if (myStudent.Id == userId)
    {
        myStudent.Mathematics.Add(mathMark);
    }
}

然后，当您想要显示学生的所有数学分数时：

foreach (Mark mark in myStudent.Mathematics)
{
    Console.WriteLine(mark.HYEXAM + "," + mark.ANEXAM);
}

这就是你要追求的吗？

将项添加到列表中

1 个答案: