不可能从对象提取XML数据

本文关键字：XML 数据 提取 对象 不可能 | 更新日期: 2023-09-27 18:09:51

我有一个非常简单的应用程序，其中一个XML文件被反序列化为对象。当我试图从对象中读出值时，我得到null。

我的xml文件看起来像这样:

 <?xml version="1.0" encoding="utf-8" ?>
    <Settings>
      <HomePage>http://www.google.dk</HomePage>
      <DefaultAudioLevel>100</DefaultAudioLevel>
    </Settings>

我的模型是这样的:

[Serializable()]
public class Settings
{   
    [XmlElement("HomePage")]
    public string Homepage { get; set; }
    [XmlElement("DefaultAudioLevel")]
    public string DefaultAudioLevel { get; set; }
}

和SettingSerializer.cs:

public class SettingSerializer
{
    private string path;
    private string EXE = Assembly.GetExecutingAssembly().GetName().Name;
    Settings settings = null;
    public SettingSerializer(string xmlPath = null)
    {
        path = new FileInfo(xmlPath ?? EXE + ".xml").FullName.ToString();
    }
    public void Deserialize()
    {
        XmlSerializer serializer = new XmlSerializer(typeof(Settings));
        StreamReader reader = new StreamReader(path);
        settings = (Settings)serializer.Deserialize(reader);
        reader.Close();
    }
}

和我的测试类:

static void Main(string[] args)
{
    SettingSerializer serializer = new SettingSerializer();
    serializer.Deserialize();
    Settings settings = new Settings();
    Console.WriteLine(settings.Homepage);    
    Console.WriteLine(settings.DefaultAudioLevel);
    Console.ReadKey();
}

有人能发现这个错误吗?

不可能从对象提取XML数据

将Serializer更改为:

public class SettingSerializer
{
    private string path;
    private string EXE = Assembly.GetExecutingAssembly().GetName().Name;
    public SettingSerializer(string xmlPath = null)
    {
        path = new FileInfo(xmlPath ?? EXE + ".xml").FullName.ToString();
    }
    public Settings Deserialize()
    {
        XmlSerializer serializer = new XmlSerializer(typeof(Settings));
        StreamReader reader = new StreamReader(path);
        var settings = (Settings)serializer.Deserialize(reader);
        reader.Close();
        return settings;
    }
}

然后在你的main方法中你可以这样做:

static void Main(string[] args)
{
    SettingSerializer serializer = new SettingSerializer();
    Settings settings = serializer.Deserialize();
    Console.WriteLine(settings.Homepage);    
    Console.WriteLine(settings.DefaultAudioLevel);
    Console.ReadKey();
}

正如您最初所拥有的那样，正在反序列化的settings与主方法中包含的settings之间没有联系。您只需创建一个新对象并输出其默认值，在您的示例中是null或空字符串。

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