[英]Adding an Array of Objects to another Class c#
I am attemping to read a text file in the format of (The # at end is just the number of classes they're in, but I dont save the course name with the fac/students class) 我试图读取以下格式的文本文件(结尾的#只是他们所在课程的数量,但我没有将课程名称保存在fac / students类中)
Course Biology
Faculty Taylor Nate 0
Student Doe John 3
Student Sean Big 0
Course Art
Faculty Leasure Dan 1
The first input should be a course, followed by the faculty and students of the specific course. 首先输入的应该是一门课程,然后是特定课程的教职员工。 The Course class should contain a collection of faculty members and a collection of students.
课程课程应包含教师和学生的集合。
I have been able to put each course/student/faculty into their respective class, but I am having trouble visualizing a way to add the students/faculty to the course. 我已经能够将每门课程/学生/教师放到各自的班级,但是我在想像一种将学生/教师添加到课程中的方法时遇到了麻烦。
My current idea putting the data into their respective classes would be to keep the current index of the course- therefore I have it saved as 我目前的想法是将数据放入各自的类中,以便保留课程的当前索引,因此我将其另存为
courses[currentCourse++]
so when I parse the next line, (being a faculty/student) I already know what the course index should be. 因此,当我解析下一行时,(作为教师/学生)我已经知道课程索引应该是什么。
using (StreamReader reader = new StreamReader(fileName))
{
while (!reader.EndOfStream)
{
lineCounter++;
line = reader.ReadLine();
string[] words = line.Split(' ');
Console.WriteLine(words[0]);
if (words[0] == "Course")
{
string nameOfCourse = words[1];
courses[currentCourse++] = new Course
{
Name = nameOfCourse
};
}
if (words[0] == "Faculty")
{
string firstName = words[1];
string lastName = words[2];
string numOfClasses = words[3];
faculty[currentFaculty++] = new Faculty
{
FirstName = firstName,
LastName = lastName,
NumOfClasses = numOfClasses,
};
}
if (words[0] == "Student")
{
string firstName = words[1];
string lastName = words[2];
string numOfClasses = words[3];
students[currentStudent++] = new Student
{
FirstName = firstName,
LastName = lastName,
NumOfClasses = numOfClasses,
};
}
I know the problem lies in the courses class itself- but i'm not sure the terminology to add a class to another class. 我知道问题出在课程班级本身,但是我不确定将班级添加到另一个班级的术语。
public class Course
{
public override string ToString()
{
return $"{Name}";
}
public string Name { get; set; }
}
public class Student
{
public override string ToString()
{
return $"{FirstName} {LastName} {NumOfClasses}";
}
public string FirstName { get; set; } = string.Empty;
public string LastName { get; set; } = string.Empty;
public string NumOfClasses { get; set; } = string.Empty;
}
Thanks for reading! 谢谢阅读!
You want to add a collection of Student
and Faculty
to the course class, correct? 您要向课程添加
Student
和Faculty
的集合,对吗? You can do so like this by simply adding a List<T>
to your Course
class and then initializing it in a constructor. 您可以通过将
List<T>
添加到Course
类中,然后在构造函数中对其进行初始化来做到这一点。
public class Course
{
public override string ToString()
{
return $"{Name}";
}
public string Name { get; set; }
public List<Student> Students { get; set; }
public List<Faculty> FacultyMems { get; set; }
public Course()
{
Students = new List<Student>();
FacultyMems = new List<Faculty>();
}
}
And in your using
block, you can add each student/faculty to the course as so: 在您的
using
块中,您可以按以下方式将每个学生/教师添加到课程中:
if (words[0] == "Course")
{
string nameOfCourse = words[1];
currentCourse++;
courses[currentCourse] = new Course
{
Name = nameOfCourse
};
}
if (words[0] == "Faculty")
{
string firstName = words[1];
string lastName = words[2];
string numOfClasses = words[3];
courses[currentCourse].FacultyMems.Add(new Faculty
{
FirstName = firstName,
LastName = lastName,
NumOfClasses = numOfClasses,
});
}
if (words[0] == "Student")
{
string firstName = words[1];
string lastName = words[2];
string numOfClasses = words[3];
courses[currentCourse].Students.Add(new Student
{
FirstName = firstName,
LastName = lastName,
NumOfClasses = numOfClasses,
});
}
With this, each time you encounter "Course"
your course list will add a new item and then you can append students/faculty/etc when those values occur. 这样,每次您遇到
"Course"
您的课程列表都会添加一个新项目,然后您可以在出现这些值时追加学生/教师/等。
This can be simplified even further but the concept is there for you to follow. 这可以进一步简化,但是这里有您可以遵循的概念。 Hope this helps.
希望这可以帮助。
If I'm understanding you correctly, you want your course
s to have a list of faculty and students? 如果我对您的理解正确,那么您是否希望
course
中有教师和学生的清单?
public class Course
{
public override string ToString()
{
return $"{Name}";
}
public string Name { get; set; }
public List<Student> Students { get; set; }
public List<Faculty> FacultyMembers {get; set;}
}
Just be sure to initialize the Lists before trying to add things to them otherwise you'll get a null ref exception. 只需确保在尝试将列表添加到列表之前初始化列表,否则您将获得null ref异常。
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