System.TypeInitializationException：“'ScheduleDataProcessor.Logger'的类型初始值设定项引发异常

Question

尊敬的先生， 我收到以下异常 System.TypeInitializationException：“'ScheduleDataProcessor.Logger'的类型初始值设定项引发了异常。 内部异常 NotSupportedException：不支持给定路径的格式。 请找到以下代码：

namespace ScheduleDataProcessor public partial class DataProcessor : Form {
        private System.Timers.Timer timer = new System.Timers.Timer();
        DBConnection dbConnection = new DBConnection();
        string pathBackup = ((object)ConfigurationManager.AppSettings["DATABACKUP"]).ToString();
        public DataProcessor() {
            InitializeComponent();
        }
        private void btnStartStop_Click(object sender, EventArgs e)
        {
            this.timer.Elapsed += new ElapsedEventHandler(this.OnElapsed);
            this.timer.Interval = (double)Convert.ToInt64(((object)ConfigurationManager.AppSettings["Interval"]).ToString());
            this.timer.Enabled = true;
        }

        private void OnElapsed(object sender, ElapsedEventArgs e)
        {
            this.timer.Enabled = false;
            Logger.Append("Service is recalled");   //**<-----**--getting exception here****
            try
            {
                this.LoopDataDirectory();
            }
            catch (Exception ex)
            {
                Logger.Append(ex.Message.ToString());
            }
            finally
            {
                this.timer.Enabled = true;
            }
        }

namespace ScheduleDataProcessor
{
    public class Logger
    {
        private static StreamWriter sw;
        private static String logDirectory;
        static string outputPath = System.IO.Path.GetDirectoryName(Assembly.GetEntryAssembly().Location) + "\Error\";

                                   public static void LogMessage(String message)
        {
            Logger.Append(message);
        }

        // constructor for static resources
        static Logger()
        {
            logDirectory = outputPath + System.Configuration.ConfigurationSettings.AppSettings["ERRORLOG"].ToString();

            if (File.Exists(logDirectory) && File.ReadAllBytes(logDirectory).Length >= 102400)
            {
                File.Delete(logDirectory);
            }

            if (!File.Exists(logDirectory))
            {
                FileStream fs = File.Create(logDirectory);
                fs.Close();
            }
            sw = File.AppendText(logDirectory);
        }

        public static void Append(String message)
        {
            try
            {
                lock (sw)
                {
                    if (System.Configuration.ConfigurationSettings.AppSettings["WRITELOG"].Equals("true"))
                    {
                        sw.WriteLine("Timestamp : " + System.DateTime.Now + " :: " + message);
                        sw.Flush();
                    }
                }
            }
            catch
            {
                // do nothing
            }
        }
    }

Note：此问题总结整理于: System.TypeInitializationException: 'The type initializer for 'ScheduleDataProcessor.Logger' threw an exception.'

Answer 1

根据我的测试，我重现了您的问题。

我们还需要检查您的 bin/debug 文件夹中是否存在 Error 文件夹。

请进行以下更改：

 static Logger()  
        {  
            if (!Directory.Exists(outputPath))  
            {  
                Directory.CreateDirectory(outputPath);  
            }  
  
            logDirectory = outputPath +  System.Configuration.ConfigurationSettings.AppSettings["ERRORLOG"].ToString();;  
            if (File.Exists(logDirectory) && File.ReadAllBytes(logDirectory).Length >= 102400)  
            {  
                File.Delete(logDirectory);  
            }  
            if (!File.Exists(logDirectory))  
            {  
                FileStream fs = File.Create(logDirectory);  
                fs.Close();  
            }  
            sw = File.AppendText(logDirectory);  
        }  

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