如何逐行、逐部分地从文本文件中取出数据？

Question

所以我一直在试图用保存在文本文件中的 ID 号填充此列表框。从文件中取出行并将它们放入这样的列表框中很简单，但是该 ID 号也与我想在其他文本框中显示的更多信息共享。

编辑 所以这是一个逗号分隔的文件，下面是一个学生存储信息的例子：

1234561, Hubert, Huphrey, 123 Apple, Townsville, Some State, MM/DD/YYYY

说白了，我有这个包含多个 ID #、名称和地址的文本文件，但我只想显示 ID #，以便可以从列表框中单击它们，以便其余的的信息可以显示在屏幕上。

我已经接受了很多建议，但我的脑袋却想不出几个关键点。让我先分享一下我目前拥有的代码：

编辑我已经更新了使用新的Student 类的方法。但是现在我需要弄清楚如何使用集合来获取类的属性。

        List<Student> colStudents = new List<Student>();
        public MainWindow()
        {
            InitializeComponent();
        }

        private void btnGetStudents_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //Define a Student object variable with the name StudentInfo
                string strStudentList;
                // Declare a StreamReader variable for Student Object
                StreamReader srStudent = new StreamReader("StudentData.txt");
                // intIndex is the index of the contact chosen
                int intIndex = lstStudentsID.SelectedIndex;

                //Clear list box to avoid having it fill up too much
                lstStudentsID.Items.Clear();

                // Read the disk file structure
                while (srStudent.EndOfStream == false)
                {
                    // Read disk file into a string variable using the ReadLine method.
                    strStudentList = srStudent.ReadLine();
                    // Tokenize the string read from Student object
                    string[] tokenize = strStudentList.Split(',');
                    // Create a student object instance from the Student class.
                    Student StudentInfo = new Student();
                    // Set properties of Student object to array element containing the student data
                    StudentInfo.StudentID = int.Parse(tokenize[0]);
                    StudentInfo.StudentFirstName = tokenize[1];
                    StudentInfo.StudentLastName = tokenize[2];
                    StudentInfo.StudentAddressCity = tokenize[3];
                    StudentInfo.StudnetBirthDate = tokenize[4];
                    // Add student object to collection
                    colStudents.Add(StudentInfo);
                    // Add ID's to the listbox
                    lstStudentsID.Items.Add(StudentInfo.StudentID);
                }
                //Close disk file after all records have been read in
                srStudent.Close();
            }
            catch(Exception ex)
            {
                MessageBox.Show("Experiencing the following disk problems: " + Environment.NewLine + ex.Message, "Disk File", MessageBoxButton.OK, MessageBoxImage.Exclamation);
            }
        }

编辑： 现在我的 while 循环运行良好，我需要弄清楚如何利用该集合，或者只是想办法使用第二种和第三种方法打印出所选学生的全名和地址

这是我的新课程：

public class Student
    {
        // Properties
        private double _ID;  // Student's ID, double just in case int is too small
        private string _StudentFirstName;  // Student's Name
        private string _StudentLastName;
        private string _StudentAddressStreet;
        private string _StudentAddressCity;
        private string _StudentBirthDate;

        // Constructor
        public Student()
        {
            _ID = 0;
            _StudentFirstName = "";
            _StudentLastName = "";
            _StudentAddressStreet = "";
            _StudentAddressCity = "";
            _StudentBirthDate = "";
        }

        // ID Property
        public double StudentID
        {
            get { return _ID; }
            set { _ID = value; }
        }

        // First Name Property
        public string StudentFirstName
        {
            get { return _StudentFirstName; }
            set { _StudentFirstName = value; }
        }

        // Last name Property
        public string StudentLastName
        {
            get { return _StudentLastName; }
            set { _StudentLastName = value; }
        }

        // Address Property
        public string StudentAddressStreet
        {
            get { return _StudentAddressStreet; }
            set { _StudentAddressStreet = value; }
        }

        // Address Property
        public string StudentAddressCity
        {
            get { return _StudentAddressCity; }
            set { _StudentAddressCity = value; }
        }

        // Address Property
        public string StudnetBirthDate
        {
            get { return _StudentBirthDate; }
            set { _StudentBirthDate = value; }
        }
    }

Answer 1

您创建字典，键作为学生ID，值作为文件行 然后使用字典你可以填充列表框 当用户选择特定列表项从字典中检索数据时，不要执行 IO 操作。

字典 studentInfo = new Dictionary();

    static void Main(string[] args)
    {


        StreamReader Student = new StreamReader("StudentData.txt");
        // intIndex is the index of the contact chosen
        intIndex = lstStudentsID.SelectedIndex;
        // Add student to colStudents list
        colStudents.Add(Student.ToString());
        // Read the disk file structure
        while (Student.EndOfStream == false)
        {
            // Read disk file into a string variable using the ReadLine method.
            strStudentInfo = Student.ReadLine();
            // Tokenize the string read from Student object
            string[] tokenize = strStudentInfo.Split(',');
            // Create a student object instance from the Student class.
            string temp = tokenize[0];

            studentInfo.Add("Key", strStudentInfo);

        }

    }

Answer 2

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.stream.Stream;

public class TestReadFile {

    public static void main(String args[]) {

        String fileName = "StudentData.txt";

        //read file into stream, try-with-resources
        try (Stream<String> stream = Files.lines(Paths.get(fileName))) {

            stream.forEach(System.out::println);

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}