Question

我通常使用（de）序列化。我之前从未遇到过任何问题，但我认为这只是一个人为错误，我看不到...... 序列化工作完美但不是反序列化。

这是我的代码：

using System;
using System.IO;
using System.Windows.Forms;
using Utils;

using System.Xml;
using System.Xml.Serialization;

namespace Tests
{
    public partial class MainForm : Form
    {
        private Test test;

        public MainForm()
        {
            InitializeComponent();
        }

        private void SaveButton_Click(object sender, EventArgs e)
        {
            try
            {
                test = new Test();
                test.MyInt = int.Parse(MyIntTextBox.Text);
                test.MyStr = MyStrTextBox.Text;
                test.Save();
                MessageBox.Show("Serialized!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Exception caught", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void LoadButton_Click(object sender, EventArgs e)
        {
            try
            {
                test = Test.Load();
                MyIntTextBox.Text = test.MyInt.ToString();
                MyStrTextBox.Text = test.MyStr;
                MessageBox.Show("Deserialized!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Exception caught", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

    }

    [Serializable]
    public class Test
    {
        public string MyStr { set; get; }
        public int MyInt { set; get; }

        public void Save()
        {
            using (StreamWriter sw = new StreamWriter("TestSerialized.xml"))
            {
                XmlSerializer xs = new XmlSerializer(typeof(Test));
                xs.Serialize(sw, this);
                sw.Flush();
            }
        }

        static public Test Load()
        {
            Test obj = null;
            using (StreamReader sr = new StreamReader("TestSerialized.xml"))
            {
                XmlSerializer xs = new XmlSerializer(typeof(Test));
                if (!xs.CanDeserialize(XmlReader.Create(sr)))
                    throw new NotSupportedException(string.Format("The file <{0}> cannot be loaded.", "TestSerialized.xml"));
                obj = (Test)xs.Deserialize(sr);
            }
            return (obj);
        }
    }
}

这是一个带有2个文本框的基本表单，一个用于Test类的每个属性，另外两个用于保存，另一个用于加载。

别担心，我确保要加载文件;）

我想制作一个通用（de）serliazer类，如：

public class Serializer<T>
{
    static public void Serialize(object obj, string path)
    {
        using (StreamWriter sw = new StreamWriter(path))
        {
            XmlSerializer xs = new XmlSerializer(typeof(T));
            xs.Serialize(sw, obj);
            sw.Flush();
        }
    }

    static public T Dezerialize(string path)
    {
        T obj;
        using (StreamReader sr = new StreamReader(path))
        {
            XmlSerializer xs = new XmlSerializer(typeof(T));
            if (!xs.CanDeserialize(XmlReader.Create(sr)))
                throw new NotSupportedException(string.Format("The file <{0}> cannot be loaded.", path));
            obj = (T)xs.Deserialize(sr);
        }
        return (obj);
    }
}

但我有同样的问题：反序列化不起作用......

编辑：我遇到了一个异常：“XML文档中存在错误（0,0）” 我要反序列化的XML文档（由XmlSerializer生成）

<?xml version="1.0" encoding="utf-8"?>
<Test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <MyStr>toto</MyStr>
  <MyInt>45</MyInt>
</Test>

感谢您的帮助！

Answer 1

关闭这两行

if (!xs.CanDeserialize(XmlReader.Create(sr))
    throw new NotSupportedException(string.Format("The file <{0}> cannot be loaded.", path));

或在检查是否可以解除分区后重置流

Answer 2

您的代码无法正常运行：

if (!xs.CanDeserialize(XmlReader.Create(sr)))
   throw new NotSupportedException(string.Format("The file <{0}> cannot be loaded.", "TestSerialized.xml"));

在此之后，sr中没有任何内容可读，只有这样你才会反序列化 - 这就是它失败的原因。删除此代码。

Answer 3

http://social.msdn.microsoft.com/Forums/en-US/f5a5ff54-3743-400c-b14d-92dae95f3605/there-is-an-error-in-xml-document-0-0-error-while-xml-deserialization 请点击此链接，其中包含确切的原因和解决方案。

“在您写入流之后，它被定位在最后，在您编写的XML之后。如果您尝试从同一个流中读取，则找不到根元素。所以您需要重新定位stream（stream.Position = 0）如果流支持该流，或者您需要在写入流后关闭流并打开一个新的流进行读取。“

为什么反序列化不起作用？

3 个答案: