Question

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

我的XML文件如下所示：

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

我的模型看起来像这样：

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

    [XmlElement("DefaultAudioLevel")]
    public string DefaultAudioLevel { get; set; }
}

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();
    }
}

我的测试班：

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();
}

有人能发现错误吗？

Answer 1

将您的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;
    }
}

然后在你的主要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();
}

正如您最初所做的那样，正在反序列化的settings与main方法中包含的settings之间没有任何关联。您只需创建一个新对象并打印出其默认值，在您的情况下为null或空字符串。

不可能来自对象的XML数据

1 个答案: