Question

我已经阅读了很多代码，但没有一个能解决问题。首先是代码：

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

namespace Serialization
{
    class Program
    {
        static void Main(string[] args)
        {
            using (MoveSaver objSaver = new MoveSaver(@"C:\1.bin"))
            {
                MoveAndTime mv1, mv2;
                mv1.MoveStruc = "1";
                mv1.timeHLd = DateTime.Now;
                objSaver.SaveToFile(mv1);
                mv2.MoveStruc = "2";
                mv2.timeHLd = DateTime.Now;
                objSaver.SaveToFile(mv2);
            }

            using (MoveSaver svrObj = new MoveSaver())
            {
               MoveAndTime[] MVTobjs = svrObj.DeSerializeObject(@"C:\1.bin");
               foreach (MoveAndTime item in MVTobjs)
               {
                   //Do Something
               }
            }
        }

    }


    public class MoveSaver:IDisposable 
    {
        public void Dispose()
        {
            if (fs != null)
            {
                fs.Close();
            }
        }
        FileStream fs;
        StreamWriter sw;
        public string filename { get; set; }
        public MoveSaver(string FileName)
        {
            this.filename = FileName;
            fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite);
        }

        public MoveSaver()
        {

        }

        ~MoveSaver()
        {
            if (fs != null)
            {
                fs.Close();
            }

        }

        public MoveAndTime[] DeSerializeObject(string filename)
        {
            MoveAndTime[] objectToSerialize;
            Stream stream = File.Open(filename, FileMode.Open);
            BinaryFormatter bFormatter = new BinaryFormatter();
            objectToSerialize = (MoveAndTime[])bFormatter.Deserialize(stream);
            stream.Close();
            return objectToSerialize;
        }

        public bool SaveToFile(MoveAndTime moveTime)
        {
            try
            {
                BinaryFormatter bformatter = new BinaryFormatter();
                bformatter.Serialize(fs, moveTime);
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }
    }

    [Serializable]
    public struct MoveAndTime
    {
        public string MoveStruc;
        public DateTime timeHLd;
    }
}

代码模仿了在程序中保存用户的所有操作的需要。稍后会在该程序上显示（比如你打牌等等，你想要复习：D发生了什么）。问题是当调用DeSerializeObject函数时，行objectToSerialize = (MoveAndTime[])bFormatter.Deserialize(stream);抛出异常（肯定在运行时），从单个对象到数组的强制转换无效：

无法投射类型的对象输入'Serialization.MoveAndTime' 'Serialization.MoveAndTime []'。

有什么想法吗？任何改进或完全改变的方法都是值得赞赏的。

Answer 1

您正在将单个MoveAndTime实例保存到该文件中，但是您正在尝试读取它们的数组。

Answer 2

请像这样修改您的主要区块。我认为它可以达到你想要的效果。

static void Main(string[] args)
{
        using (MoveSaver objSaver = new MoveSaver(@"C:\1.bin"))
        {
            MoveAndTime[] MVobjects = new MoveAndTime[2];

            MoveAndTime mv1, mv2;
            mv2 = new MoveAndTime();
            mv1 = new MoveAndTime();
            mv1.MoveStruc = "1";
            mv1.timeHLd = DateTime.Now;

            mv2.MoveStruc = "2";
            mv2.timeHLd = DateTime.Now;

            MVobjects[0] = new MoveAndTime();
            MVobjects[0] = mv1;
            MVobjects[1] = new MoveAndTime();
            MVobjects[1] = mv2;

            objSaver.SaveToFile(MVobjects);
        }

        using (MoveSaver svrObj = new MoveSaver())
        {
            MoveAndTime[] MVTobjs = svrObj.DeSerializeObject(@"C:\1.bin");
            foreach (MoveAndTime item in MVTobjs)
            {
                //Do Something
                Console.WriteLine(item.MoveStruc);
                Console.WriteLine(item.timeHLd);
            }
        }
    }

由于

序列化/反序列化对象/结构数组

2 个答案: