我有以下代码。我将一些内容保存到列表中，并希望将这两个列表保存在XML文件中，但是在尝试调试时，程序会在“51”行中断。
接下来的事情：
XmlSerializer xs = new XmlSerializer(typeof(T));
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.IO;
using System.Xml.Serialization;
namespace Maman15cs
{
public class XSerial
{
/// <summary>
/// Save an instance of a class to an XML file
/// </summary>
/// <param name="filename">Full or relative path to the file</param>
/// <param name="cls">Class to serialize and save.</param>
/// <param name="t">Type of the class (use: typeof(ClassName)</param>
/// <returns>True on success, False on failure</returns>
public static void Save<T>(string filename, T cls)
{
using (Stream s = File.Open(filename, FileMode.Create))
{
using (StreamWriter sw = new StreamWriter(s))
{
sw.Write( SerializeObject<T>(cls) );
sw.Close();
s.Close();
return;
}
}
}
/// <summary>
/// Serialize the object into an XML format
/// </summary>
/// <typeparam name="T">Type of object to serialize</typeparam>
/// <param name="pObject">the object to serialize</param>
/// <returns>a string representing the XML version of the object</returns>
public static String SerializeObject<T>(T pObject)
{
MemoryStream memoryStream = new MemoryStream();
UTF8Encoding encoding = new UTF8Encoding();
XmlSerializer xs = new XmlSerializer(typeof(T));
System.Xml.XmlTextWriter xmlTextWriter = new System.Xml.XmlTextWriter(memoryStream, Encoding.UTF8);
xs.Serialize(xmlTextWriter, (object) pObject);
memoryStream = (MemoryStream)xmlTextWriter.BaseStream;
return encoding.GetString(memoryStream.ToArray());
}
/// <summary>
/// Deserialize the object back into the object from an XML string
/// </summary>
/// <typeparam name="T">Type of the object to restore</typeparam>
/// <param name="pXmlizedString">The string that represents the object in XML</param>
/// <returns>A new instance of the restored object</returns>
public static T DeserializeObject<T>(String pXmlizedString)
{
UTF8Encoding encoding = new UTF8Encoding();
XmlSerializer xs = new XmlSerializer(typeof(T));
MemoryStream memoryStream = new MemoryStream(encoding.GetBytes(pXmlizedString));
System.Xml.XmlTextWriter xmlTextWriter = new System.Xml.XmlTextWriter(memoryStream, Encoding.UTF8);
return (T)xs.Deserialize(memoryStream);
}
}
public class ClassRoom
{
public string ClassNumber{ get; set; }
public int NumberofPlaces { get; set; }
public string[,] DayandHour = new string[6, 8];
public static ClassRoom AddClassRoom()
{
var classRoom = new ClassRoom();
Console.WriteLine("Enter the Class number, the Number of places\n");
classRoom.ClassNumber = Console.ReadLine();
classRoom.NumberofPlaces = int.Parse(Console.ReadLine());
return classRoom;
}
public ClassRoom AddCourseInClassroom(ClassRoom classroom, string courseNum)
{
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 8; j++)
{
if (String.IsNullOrEmpty(classroom.DayandHour[i, j]))
{
classroom.DayandHour[i, j] = courseNum;
return classroom;
}
}
}
return null;
}
public void PrintClassRoom(ClassRoom classroom)
{
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 8; j++)
{
if (!(String.IsNullOrEmpty(classroom.DayandHour[i, j])))
{
Console.WriteLine(" {0}", classroom.DayandHour[i, j]);
}
}
Console.WriteLine("\n");
}
}
public void PrintList<T>(IEnumerable<T> col)
{
foreach (var item in col)
Console.WriteLine(item);
}
public void DeleteCourse(string coursenum, ClassRoom classroom)
{
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 8; j++)
{
if (classroom.DayandHour[i, j] == coursenum)
{
classroom.DayandHour[i, j] = null;
}
}
}
}
}
public class Course
{
public string CourseName;
public string CourseNumber;
public int StudentsNumber;
public string TeacherName;
public string ClassNumber;
public static Course AddCourse()
{
Course newCourse = new Course();
Console.WriteLine("Enter the Course's name, course's number, students number, teacher's name, and class' number\n");
newCourse.CourseName = Console.ReadLine().ToString();
newCourse.CourseNumber = Console.ReadLine();
newCourse.StudentsNumber = int.Parse(Console.ReadLine());
newCourse.TeacherName = Console.ReadLine().ToString();
newCourse.ClassNumber = Console.ReadLine().ToString();
return newCourse;
}
public void PrintCourse(Course course)
{
Console.WriteLine("The course name is " + course.CourseName);
Console.WriteLine("\nThe course number is " + course.CourseNumber);
Console.WriteLine("\nThe class number is " + course.ClassNumber);
Console.WriteLine("\nThe students number is " + course.StudentsNumber);
Console.WriteLine("\nTeacher's name is " + course.TeacherName + "\n");
}
}
public class Program
{
static void Main(string[] args)
{
var course = new List<Course>();
var classroom = new List<ClassRoom>();
bool loop = true;
int actionChoice;
while (loop == true) {
Console.WriteLine("What do you want to do? (Enter number): \n 1)Add a new Course \n 2)Add a new class room \n 3)Add an existing course to an existing classroom \n 4)Read the information of a specific classroom \n 5)Read the information of all the classrooms \n 6)Read the information of a specific course \n 7)Delete a specific course in a specific classrom \n 8)Exit the program \n");
actionChoice = int.Parse(Console.ReadLine());
switch (actionChoice)
{
case 1: //Add a new Course
var new_course = Course.AddCourse();
course.Add(new_course);
break;
case 2:
var new_classRoom = ClassRoom.AddClassRoom();
classroom.Add(new_classRoom);
break;
case 3:
Console.WriteLine("Enter the course's number and the classroom's number");
var courseNumber = Console.ReadLine();
var classroomNumber = Console.ReadLine();
foreach (ClassRoom room in classroom)
{
if (room.ClassNumber == classroomNumber)
room.AddCourseInClassroom(room, courseNumber);
}
foreach(Course _course in course)
{
if(_course.CourseNumber == courseNumber)
_course.ClassNumber = classroomNumber;
}
break;
case 4:
Console.WriteLine("Enter the classroom number");
classroomNumber = Console.ReadLine();
foreach (ClassRoom room in classroom)
{
if (room.ClassNumber == classroomNumber)
{
room.PrintClassRoom(room);
}
}
break;
case 5:
foreach (ClassRoom room in classroom)
{
room.PrintClassRoom(room);
}
break;
case 6:
Console.WriteLine("Enter the course number");
courseNumber = Console.ReadLine();
foreach (Course ccourse in course)
{
if (ccourse.CourseName == courseNumber)
ccourse.PrintCourse(ccourse);
}
break;
case 7:
Console.WriteLine("Enter the course's number and the classroom's num");
courseNumber = Console.ReadLine();
classroomNumber = Console.ReadLine();
foreach (ClassRoom classRoom in classroom)
{
if (classRoom.ClassNumber == classroomNumber)
classRoom.DeleteCourse(courseNumber, classRoom);
}
break;
case 8:
loop = false;
break;
}
}
XSerial.Save("Course.xml", course);
XSerial.Save("Classroom.xml", classroom);
}
}
}
如果有人可以帮我完成这个，并更正部分（我怀疑问题来自SerializeObject方法）。
答案 0 :(得分：1)
你应该改变这一行
public string[,] DayandHour = new string[6, 8];
ClassRoom的因为Xml序列化的多维数组不支持。
答案 1 :(得分：-1)
查看Reflection API，它用于在运行时动态确定类型。
typeof vs GetType()：Type Checking: typeof, GetType, or is?
Reflection API：http://msdn.microsoft.com/en-us/library/ms173183%28v=vs.90%29.aspx