Question

我有一个方法

 private string sLogFormat;
        private string sErrorTime;

        public void CreateLogFile(string path, string msg)
        { 
            //sLogFormat used to create log files format :
            // dd/mm/yyyy hh:mm:ss AM/PM ==> Log Message
            sLogFormat = DateTime.Now.ToShortDateString().ToString() + " " + DateTime.Now.ToLongTimeString().ToString() + " ==> ";

            //this variable used to create log filename format "
            //for example filename : ErrorLogYYYYMMDD
            string sYear = DateTime.Now.Year.ToString();
            string sMonth = DateTime.Now.Month.ToString();
            string sDay = DateTime.Now.Day.ToString();
            sErrorTime = sYear + sMonth + sDay;

            StreamWriter sw = new StreamWriter(path + sErrorTime, true);
            sw.WriteLine(sLogFormat + msg);
            sw.Flush();
            sw.Close();

        }

另一个方法run（）触发Onchanged处理程序（当文件夹内容更精确地更改时触发）这里

 public static void Run()
        {
            // Create a new FileSystemWatcher and set its properties.
            FileSystemWatcher watcher = new FileSystemWatcher();
            watcher.Path = "C:/model_RCCMREC";

            /* Watch for changes in LastAccess and LastWrite times, and
               the renaming of files or directories. */
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            //   watch wav files.
            watcher.Filter = "*.wav";

            // Add event handlers. 
            watcher.Created += new FileSystemEventHandler(OnChanged);

            // Begin watching.
            watcher.EnableRaisingEvents = true;
        }

和OnChanged处理程序为

public static  void OnChanged(object source, FileSystemEventArgs e)
        {  
            try
            { 

                //access last folder(newly created one is suposedly at last position)
                var directory = new DirectoryInfo("C:/model_RCCMREC");
                var myFile = (from f in directory.GetFiles() orderby f.LastWriteTime descending select f).First();

                //2.Split the file name.
            }


            catch
            {
//I WANT TO ACCESS THE METHOD CreateLogFile(x,y) HERE

            }
        }

我无法正常从OnChanged处理程序访问方法CreateLogFile（）。如何访问它？

Answer 1

似乎OnChanged应该是非静态的。通常只有特定实例才会调用OnChanged。这是因为某些事物发生变化的knolage在它自己的实例中被包围了。从OnChanged中移除静电，你就可以了。

或者如果你不能/不想让你的OnChanged非静态，你可以使你的CreateLogFile静态，我没有看到任何理由在你的方法之外判断你的变量：

    public static void CreateLogFile(string path, string msg)
    { 
        string sLogFormat;
        string sErrorTime;

        //sLogFormat used to create log files format :
        // dd/mm/yyyy hh:mm:ss AM/PM ==> Log Message
        sLogFormat = DateTime.Now.ToShortDateString().ToString() + " " + DateTime.Now.ToLongTimeString().ToString() + " ==> ";

        //this variable used to create log filename format "
        //for example filename : ErrorLogYYYYMMDD
        string sYear = DateTime.Now.Year.ToString();
        string sMonth = DateTime.Now.Month.ToString();
        string sDay = DateTime.Now.Day.ToString();
        sErrorTime = sYear + sMonth + sDay;

        StreamWriter sw = new StreamWriter(path + sErrorTime, true);
        sw.WriteLine(sLogFormat + msg);
        sw.Flush();
        sw.Close();

    }

Answer 2

你有两种方法：

1-如果您的Logger类是非静态的，请使用YourLoggerClass创建一个新的记录器对象log = new YourLoggerClass（）;做空洞

2-让您的Logger类保持静态，这样您就可以在任何地方轻松使用它：

private static string sLogFormat;
private static string sErrorTime;

public static void CreateLogFile(string path, string msg)
{
     ...

从静态例程c＃访问方法

2 个答案: