二进制序列化（保存和加载）

Question

我的问题是，我在旧程序中使用了二进制序列化的这种结构，使用的是保存和加载对象列表的相同格式。 在新程序中，我没有收到任何错误，并且在运行该程序并进入保存功能时，它捕获了异常并指出“无法保存文件”。 当我手动打开.Txt文件时，保存了某种形式的数据，但是在再次运行该程序时，数据没有重新加载回去。我只是想知道是否有人可能需要几分钟来查看代码，看看是否有是我所缺少的。

编辑*我现在包括了显示类，它包含教室列表和教室类。 希望这可以帮助

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Collections;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
using System.Xml;
using System.Xml.Serialization;

namespace ExamAssignment
{
[Serializable]
public class SaveLoad
{

    public void Save(string filename, List<Classroom> objsave)                   
    {
        BinaryFormatter binFormatter = new BinaryFormatter();
        //point to the file's location 
        string strFileLocation = "SAVE.xml";
        // Gain code access to the file that we are going `
        // to write to 
        try
        {

            // Create a FileStream that will write data to file. 
            FileStream writerFileStream = new FileStream(strFileLocation,             FileMode.Create, System.IO.FileAccess.Write);
            binFormatter.Serialize(writerFileStream, objsave);
            // Close the writerFileStream when we are done. 
            writerFileStream.Close();
        }
        catch (Exception)
        {
            Console.WriteLine("Unable to save the file");
        }        
    }

    public List<Classroom> Load()
    {
        BinaryFormatter binFormatter = new BinaryFormatter();
        string strFileLocation = "SAVE.xml";// Check if we had previously Saved Results previously 
        List<Classroom> objLoad = new List<Classroom>();

        if (File.Exists(strFileLocation))
        {
            try
            {
                // Create a FileStream will gain read access to the data file. 
                FileStream readerFileStream = new FileStream(strFileLocation, FileMode.Open, System.IO.FileAccess.Read);// Reconstruct information of the Results from file. 
                objLoad = (List<Classroom>)
                binFormatter.Deserialize(readerFileStream);
                // Close the readerFileStream when we are done 
                readerFileStream.Close();
            }
            catch (Exception)
            {
                Console.WriteLine("There seems to be a file that contains the Classrooms but somehow there is a problem " + "with reading it.");// end try-catch 
            }
        }
        return objLoad;
        // end if 

..

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.IO;
    using System.Collections;
    using System.Runtime.Serialization.Formatters.Binary;
    using System.Runtime.Serialization;
    using System.Xml;
    using System.Xml.Serialization;

namespace ExamAssignment
{
[Serializable]
public class Display
{

    Classroom C1 = new Classroom();
    public List<Classroom> ClassList;
    SaveLoad objSave = new SaveLoad();


    public Display()
    {

        ClassList = new List<Classroom>();


    }


    public void saving()
    {

        objSave.Save("SAVE.xml", ClassList);


    }

    public void Load()
    {

        ClassList = objSave.Load();


    }




    public void addClassroom()
    {

        Console.WriteLine("Please Enter the number of the classroom");

        int ClassNum = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("\nNow enter the module of the classroom");

        string ClassModule = Console.ReadLine();


        ClassList.Add(new Classroom(ClassNum, ClassModule));

        for (int i = 0; i < ClassList.Count(); i++)
        {
            Console.WriteLine("\nClass Number: {0}, Class Module: {1}", ClassNum, ClassModule);

        }



    }

    public void ViewClass()

    {


        Console.WriteLine("To view the students and teacher in a classroom please enter the class number");

        int selection = Convert.ToInt32(Console.ReadLine());

        int index = ClassList.FindIndex(item => selection == item.ClassNum);

        ClassList[index].ViewClassroom();




    }

    public void ViewClassrooms()

    {

        for (int i = 0; i < ClassList.Count; i++)
        {
            Console.WriteLine("\nClass Number: {0}, Class Module: {1}", ClassList[i].ClassNum, ClassList[i].ClassModule);

        }


    }


    public void AddStudent()
    {
        int repeat = 0;
        int RoomNumber = 0;

        Console.WriteLine("Please state the room number you wish to add the students to");

        RoomNumber = Convert.ToInt32(Console.ReadLine());

        int index = ClassList.FindIndex(item => RoomNumber == item.ClassNum);

        do
        {

            ClassList[index].AddStudent();

        Console.WriteLine("\nThank you, to add another student to the classroom press 1, or to exit press 0");

        repeat = Convert.ToInt32(Console.ReadLine());


        }
        while (repeat == 1);
    }

    public void removeStudent()
    {
        int RoomNumber = 0;

        Console.WriteLine("\nPlease state the room number you wish to remove the teacher from");

        RoomNumber = Convert.ToInt32(Console.ReadLine());

        int index = ClassList.FindIndex(item => RoomNumber == item.ClassNum);

        ClassList[index].RemoveStudent();


    }

    public void AddModule()
    {
        throw new System.NotImplementedException();
    }

    public void ViewModule()
    {
        throw new System.NotImplementedException();
    }

    public void AddTeacher()
    {


        int repeat = 0;
        int RoomNumber = 0;

        Console.WriteLine("Please state the room number you wish to add the Teacher to");

        RoomNumber = Convert.ToInt32(Console.ReadLine());

        int index = ClassList.FindIndex(item => RoomNumber == item.ClassNum);

        do
        {

            ClassList[index].AddTeacher();

        Console.WriteLine("\nThank you, to add another teacher to a classroom press 1, or to exit press 0");

        repeat = Convert.ToInt32(Console.ReadLine());

        }

        while (repeat == 1);

    }

        public void removeTeacher()
        {

            int RoomNumber = 0;

            Console.WriteLine("\nPlease state the room number you wish to remove the teacher from");

            RoomNumber = Convert.ToInt32(Console.ReadLine());

            int index = ClassList.FindIndex(item => RoomNumber == item.ClassNum);

            ClassList[index].RemoveTeacher();


        }



}

}

namespace ExamAssignment
{

[Serializable]
public class Classroom
{
    private int classNum;
    private string classModule;
    public Teacher t1;
    public List<Student> ClassStudents;
    public Display d1;
    public int selection;



    public Classroom(int newClassNum, string newClassModule)
    {

        ClassStudents = new List<Student>();
        Display d1 = new Display();

        classNum = newClassNum;
        classModule = newClassModule;
        //selection = Newselection;

    }

    public Classroom()
    {





    }


    public void AddStudent()
    {


            Console.WriteLine("Please enter the Student Name");
            string stuName = Console.ReadLine();

            Console.WriteLine("Now enter the student Id");
            int stuNum = Convert.ToInt32(Console.ReadLine());


            ClassStudents.Add(new Student(stuName, stuNum));


            for (int i = 0; i < ClassStudents.Count(); i++)
            {
                Console.WriteLine("\nStudent Name: {0}, Student ID: {1}", ClassStudents[i].Name, ClassStudents[i].StudentId);

            }


    }

    public void AddTeacher()
    {



        Console.WriteLine("Please enter the Teacher's name to add to the classroom");

        string teachName = Console.ReadLine();

        Console.WriteLine("Now enter the Teacher ID");

        int teachNum = Convert.ToInt32(Console.ReadLine());

        t1 = new Teacher(teachNum, teachName);



    }


    public void RemoveStudent()
    {

        int loop = 0;

        do
        {

            int j = 0;
            int selection = 0;



            for (int i = 0; i < ClassStudents.Count(); i++)
            {
                Console.WriteLine("\nStudent Name: {0}, Student ID: {1}, {2}", ClassStudents[i].Name, ClassStudents[i].StudentId, j);
                j = j + 1;
            }

            Console.WriteLine("\n\nTo remove a student please choose a number from the list or press 99 to exit");

            selection = Convert.ToInt32(Console.ReadLine());

            if (selection < 98)
            {

                loop = 1;

            }

            else
            {

                ClassStudents.RemoveAt(selection); 

            }
        }
        while (loop == 0);


    }


    public void RemoveTeacher()
    {

        int repeat = 0;

        do
        {
            Console.WriteLine("\nTeacher name:{0}, Teacher ID {1}\n", t1.name, t1.staffId);

            Console.WriteLine("To remove this teacher press 1 or to go back to the menu press 0");

            int selection = Convert.ToInt32(Console.ReadLine());

            if (selection == 1)
            {

                t1 = null;
                Console.WriteLine("\n Thank you, this teacher has been removed\n");

            }

            if (selection == 0)
            {

                repeat = 0;


            }

        }

        while (repeat == 1);

    }

    public void ViewClassroom()
    {


        if (ClassStudents != null)
        {
            foreach (Student s1 in ClassStudents)
            {

                Console.WriteLine("\n" + s1.name + " " + s1.studentId);
            }
        }


        if (t1 != null)
        {
            Console.WriteLine("\nTeacher name: {0}, Teacher ID {1}\n", t1.name, t1.staffId);

        }

        else
        {

            Console.WriteLine("there is no teacher associated with this classroom");

        }


    }

    public Teacher One
    {
        get
        {
            throw new System.NotImplementedException();
        }
        set
        {
        }
    }

    public Student Many
    {
        get
        {
            throw new System.NotImplementedException();
        }
        set
        {
        }
    }

    public Module onE
    {
        get
        {
            throw new System.NotImplementedException();
        }
        set
        {
        }
    } 


    public int ClassNum
    {
        get
        {
            return classNum;
        }
        set
        {
            value = classNum;
        }
    }

    public string ClassModule
    {
        get
        {
            return classModule;
        }
        set
        {
            value = classModule;
        }
    }


}

}

Answer 1

使用Serializable属性标记您的类，因为使用BinaryFormatter进行类的序列化是必需的。

[Serializable]
public class Classroom
{
    /*...your class definition...*/
}