FileSystemWatcher 在抛出异常之前工作 3-5 次 - C#

Question

文件以 .today 形式通过 EDI 传入。我需要将其更改为 .txt 并将其移动到另一个文件夹。对于大约 3-5 个文件，一切正常，然后开始抛出异常。我尝试处理这些，但这并不能解决问题。我也遇到了零星的（文件名不能为空）异常。我似乎无法弄清楚这一点。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Diagnostics;
using System.Threading;
using System.Windows.Forms;
using System.Security.Permissions;

namespace FileConverterService
{


    class ConverterService
    {



        //Configure watcher & input
        private FileSystemWatcher _watcher;

        public bool Start()
        {
            _watcher = new FileSystemWatcher(@"C:\FTP_base\temp", "*.today");

            _watcher.Created += new FileSystemEventHandler(FileCreated);

            _watcher.IncludeSubdirectories = false;

            _watcher.EnableRaisingEvents = true;

            return true;
        }




        //Configure output creation and append file name to include .txt extension
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        private void FileCreated(object sender, FileSystemEventArgs e)
        {
            try
            {
                string dateTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
                string content = File.ReadAllText(e.FullPath);
                string upperContent = content.ToUpperInvariant();
                var dir = Path.GetDirectoryName(e.FullPath);
                var convertedFileName = Path.GetFileName(e.FullPath) + dateTime + ".txt";
                var convertedPath = Path.Combine(dir, convertedFileName);

                File.WriteAllText(convertedPath, upperContent);


            }
            catch (IOException f)
            {
                if (f is IOException)
                {
                    MessageBox.Show("Exception Caught"); //was just testing
                }
            }

            MoveConvert();
        }

        //Move converted file to EDI processing folder
        public static void MoveConvert()
        {
            try { 
            string dateTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
            string rootFolderPath = @"C:\FTP_base\temp\";
            string moveTo = @"C:\FTP_base\INbound\inbound_" + dateTime + ".txt";
            //string moveTo = @"F:\FTP_base\Office Depot\INbound\inbound_" + dateTime + ".txt";
            string filesToMove = @"*.txt";   // Only move .txt

            string myfile2 = System.IO.Directory.GetFiles(rootFolderPath, filesToMove).FirstOrDefault();
            string fileToMove = myfile2;

            //moving file
            File.Move(fileToMove, moveTo);


                MoveOriginal();

            }
            catch (IOException e)
            {
                if (e is IOException)
                {
                    MessageBox.Show("File already exists."); //was just testing
                }
            }
        }


        public static void MoveOriginal()
        {
            try { 
            string dateTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
            string rootFolderPath2 = @"C:\FTP_base\temp\";
            string moveTo2 = @"C:\FTP_base\archive\archive_" + dateTime + ".archive";
            //string moveTo2 = @"F:\Xcelerator_EDI\OfficeDepot\DataFiles\Inbound\Archive2\archive_" + dateTime + ".archive";
            string filesToMove2 = @"*.today";   // Only move .today


            string myfile = System.IO.Directory.GetFiles(rootFolderPath2, filesToMove2).FirstOrDefault();
            //foreach (string file in fileList)

            string fileToMove2 = myfile;

            //moving file
            File.Move(fileToMove2, moveTo2);

            }
            catch (IOException e)
            {
                if (e is IOException)
                {
                    MessageBox.Show("IO Exception Occurred"); //was just testing
                }
            }
        }



        //Stop Service control
        public bool Stop()
        {
            _watcher.Dispose();

            return true;
        }
    }
}

Answer 1

也许这些文件仍在使用中。创建文件时会引发 FileSystemWatcher 事件，但创建过程仍然可以写入文件。请参阅here 了解可能的解决方案。