设置 xml 堆栈溢出异常错误

Question

当我尝试读取我的设置时，我收到一个错误。我知道我在某处写错了。该程序要单独完成，因为我找不到太多信息。

设置读取代码

  public static class proSave
    {
        public static propertyClass oku
        {
            get
            {
                XmlSerializer serialize = new XmlSerializer(typeof(propertyClass));
                var stream = new StreamReader("settings.xml");
                return (propertyClass)serialize.Deserialize(stream);
            }
        }
    }

设置应用代码

   namespace property
      {
        [Serializable]
        public class propertyClass
        {
            private string _serverName = proSave.oku.serverName;
            [Description("Server Bağlantı Adı"), Category("Server Setting")]
            public string serverName { get { return _serverName; }}
            private string _databaseName = proSave.oku.serverName;
            [Description("Server Bağlantısı Dosya Adı"), Category("Server Setting")]
            public string databaseName { get { return _serverName; } }
            private string _user = proSave.oku.user;
            [Description("Server Bağlantısı kullanıcı adı"), Category("Server Setting")]
            public string user { get { return _user; } }
            private string _password = proSave.oku.password;
            [Description("Server Bağlantısı kullanıcı şifresi"), Category("Server Setting")]
            public string password { get { return _password; } }
            private int _gridHeight = proSave.oku.gridHeight;
            [Description("Grid Hücre Yükseklik Ayarı nFormlar Yenilendiğinde etkinleştirilecektir."), Category("Grid Ayarları")]
            public int gridHeight { get { return _gridHeight; } }  

        }
    }

.XML：

<?xml version="1.0" encoding="utf-8"?>
<propertyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <serverName>1</serverName>
  <databaseName>Kadir</databaseName>
  <user>as</user>
  <gridHeight>40</gridHeight>
</propertyClass>

Answer 1

我认为你的propertyClass中有一个循环引用，它导致了一个循环，最终导致StackOverflow异常（引用proSave.oku，这是propertyClass的一个实例，在propertyClass中）。在 propertyClass 中删除此引用可以解决您的问题 - 代码的其余部分可以保持原样：

[Serializable]
public class propertyClass
{
    [Description("Server Bağlantı Adı"), Category("Server Setting")]
    public string serverName { get; set; }
    [Description("Server Bağlantısı Dosya Adı"), Category("Server Setting")]
    public string databaseName { get; set; }
    [Description("Server Bağlantısı kullanıcı adı"), Category("Server Setting")]
    public string user { get; set; }
    [Description("Server Bağlantısı kullanıcı şifresi"), Category("Server Setting")]
    public string password { get; set; }
    [Description("Grid Hücre Yükseklik Ayarı nFormlar Yenilendiğinde etkinleştirilecektir."), Category("Grid Ayarları")]
    public int gridHeight { get; set; }
}

如果要扩展实现以防止每次都读取 xml 文件，可以进一步修改 proSave 类以"缓存"设置，例如：

public static class proSave
{
    private static propertyClass settings;
    private const string SettingsFilePath = "C:\settings.xml";
    public static propertyClass oku
    {
        get
        {
            if (settings == null)
            {
                settings = GetSettings();
                return settings;
            }
            return settings;
        }
    }
    public static void SaveSettings(propertyClass settings)
    {
        XmlSerializer writer = new XmlSerializer(typeof(propertyClass));
        using (FileStream file = File.Create(SettingsFilePath))
        {
            writer.Serialize(file, settings);
        }
    }
    private static propertyClass GetSettings()
    {
        XmlSerializer serialize = new XmlSerializer(typeof(propertyClass));
        using (var stream = new StreamReader(SettingsFilePath))
        {
            return (propertyClass)serialize.Deserialize(stream);
        }
    }
}

如果在 SaveSettings（） 方法中写回设置时文件被锁定，则需要处理 IOExceptions。

您还可以研究替代方案，例如使用内置的 ConfigurationManager 或实现自定义 ConfigurationSection。希望这有帮助。

Answer 2

<?xml version="1.0" encoding="utf-8"?>
<propertyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <serverName>1</serverName>
  <databaseName>Kadir</databaseName>
  <user>as</user>
  <gridHeight>40</gridHeight>
</propertyClass>

System.StackOverflowException ' 要抛出的异常类型。