Question

我无法从文件系统读取json配置文件。我正在将对象序列化为这样的文件：

string json = JsonConvert.SerializeObject(Settings.Instance);
Directory.CreateDirectory(configFileDir);
File.WriteAllText(configFileDir + configFilePath, json);

完整路径为

C:\Users\username\Documents\MyApp\config.json

现在我可以用以下几行来阅读它：

string json = File.ReadAllText(configFileDir + configFilePath);                
Instance = JsonConvert.DeserializeObject<Settings>(json);

我的问题是，它表明在我构建了新版本的程序后，它无法正确读取某些属性。重新启动时，所有设置都可以正常加载，但是当我重新构建时，该文件将不会加载更长的字符串值（令牌）。

打印json字符串显示某些键的空字符串值，当在记事本中打开文件时，这些键显然具有值。

有人猜吗？

问候，迈克

编辑：

json看起来像这样：

{
"DisplayLanguage": "en-US",
"token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImp0aSI6IjM4OWZmMTIxZWU1MmI1ZDk3NWEzY2E0NzYwN2JiZTIzODc1ZjViMDUxNzY1ZDE1MGExZDgyNTM0ODUyMjE4MTcxOGQ0ZTA2NTZlM2JhYzg5In0.eyJhdWQiOiJmNWIwYjcwMS01ODEzLTQ5OGMtYmE1NS1kMWZhOGM5YzQxMGUiLCJqdGkiOiIzODlmZjEyMWVlNTJiNWQ5NzVhM2NhNDc2MDdiYmUyMzg3NWY1YjA1MTc2NWQxNTBhMWQ4MjUzNDg1MjIxODE3MThkNGUwNjU2ZTNiYWM4OSIsImlhdCI6MTUzNzI4NDA0MCwibmJmIjoxNTM3Mjg0MDQwLCJleHAiOjE1Njg4MjAwNDAsInN1YiI6ImE1MTk2OTNjLTAzMGMtNDdjMi04MGI5LTZiNTc5YmQ3MzZlNSIsInNjb3BlcyI6W119.yjzApeU54uXch-3V-x82V-mXfmyr-HG0LsxQMG74nrJP_dBmSi8MuB5mD3Zc07qRnmKnyep7YGYVdhvmukALIY4u5lXrVGXFx_U_EWMyEKce9BxMrM9qbqy-oZ5hfJ9rogUsKeQakkpnD4yciTqn0h8sg-uo6H0-pcWIubhWA9OYmU5-vAIhVRJrQBggW305auCiyKVYcoRQowf12RJhrudn8F_eOhEbrV4A9PZVHTIIVRRFFTCfcHNYDsW9cS1RJ07sOE_rg8-yjQt74gmClgZguYngjQiukCsJtzMBRywRUT24DPGauPsAyYHWzitfe-KaGBbUSLFr2YOK3cDhZI7POv6QaFH-iIcw2-2iTR_h2_rk_iVYQNsyv0lU9KglrsUjiAonqESyHvAyYcSVDaqRobDdG9iXSpKw4jDSL7vkt7_IkMQ1cCftvqueglDNosygR6zbmi4L7ESW5eia8n_6-q6tkSaPageupXXmEBMBZNQF_p8HQf9J8ma7hxc-bcPGFkHFFBhrWlTJg62fT9AR9wIq7zueYpamxkGgfZnXF9QMzEjXNobs3paF9pouTv7H6v1iHJ_90WpGe3NVnJTHxPWVImtb9npvfPgWcYE8Trz6xoTbE81Al5fLjrAK7antgS0DkYkzMp1rxSUQxw_qwTLywuFJJLcwhY5mY2s",
"GUID": "993bc5f2-0b2b-48da-8fc7-94a7b96dc322",
"sortedByRating": true,
"lists": ""
}

只有令牌和GUID似乎会丢失其值，DisplayLanguage和其他加载都很好。我用log4net打印json，这不是问题。我得到的文件路径为：

private static readonly string configFileDir = Path.Combine(Environment.ExpandEnvironmentVariables("%userprofile%"), "Documents") + @"\MyApp";
private static readonly string configFilePath = @"\config.json";

设置类如下：

public class Settings
{
    private static readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

    private static readonly string configFileDir = Path.Combine(Environment.ExpandEnvironmentVariables("%userprofile%"), "Documents") + @"\MyApp";
    private static readonly string configFilePath = @"\config.json";

    private static Settings _instance;

    public static Settings Instance
    {
        get { return _instance ?? (_instance = new Settings()); }
        private set { _instance = value; }
    }

    [JsonIgnore]
    public static readonly string AddInVersion = "1.4.0.3";

    [JsonProperty("DisplayLanguage")]
    public static string DisplayLanguage { get; set; } = "";

    [JsonProperty("token")]
    public static string AuthToken { get; set; } = "";

    [JsonProperty("GUID")]
    public static string GUID { get; set; } = "";

    [JsonProperty("sortedByRating")]
    public static bool RecommendationsSortedByRating { get; set; } = true;

    [JsonProperty("DistLists")]
    public static string DistLists { get; set; } = "";

    public static void Load()
    {
        try
        {
            log.Info("trying to read config file: " + configFileDir + configFilePath);

            string json = File.ReadAllText(configFileDir + configFilePath);
            log.Info("read: " + json);

            Instance = JsonConvert.DeserializeObject<Settings>(json);
            log.Info("Config file loaded!");
            log.Debug(JsonConvert.SerializeObject(Instance, Formatting.Indented));

        }
        catch (Exception)
        {
            log.Info("Config file not found or could not be loaded. Using Default Settings");
        }
    }

    public static void Save(string settingToSave = "")
    {
        try
        {
            string json = JsonConvert.SerializeObject(Settings.Instance, Formatting.Indented);
            Directory.CreateDirectory(configFileDir);
            File.WriteAllText(configFileDir + configFilePath, json);
            log.Info("Config file successfully saved! (" + settingToSave + ")");
        }
        catch (Exception)
        {
            log.Error("Config file could not be saved!");
        }
    }

Answer 1

您正在很好地阅读文件不是路径问题。检查设置类

public class Settings{
public string DisplayLanguage{ get; set; }
public string token{ get; set; }

 }

如果您错过任何一个，可能会造成问题。还检查格式。 Log4net可能不显示长字符串。尝试检查类中标记的大写句子大小写。

C＃File.ReadAllText（）不返回当前文件内容

1 个答案: