Filesystemwatcher双重条目

我创建了一个小的winforms应用程序来监视某个文件夹中的新pdf文件，如果在particulair文件夹中创建了一个新的pdf文件，它将把它复制到另一个位置。

我遇到的问题是filesystemwatcher在我的列表框中创建了两个/多个条目，我该如何解决这个问题？

namespace Scanmonitor { public partial class Form1 : Form { FileSystemWatcher watcher = new FileSystemWatcher(); DateTime lastRead = DateTime.MinValue; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { FileWatch(); } public void FileWatch() { watcher.Path = @"C:\Scanner"; watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.DirectoryName | NotifyFilters.LastWrite; watcher.Filter = "*.pdf"; watcher.Changed += new FileSystemEventHandler(OnChanged); watcher.EnableRaisingEvents = true; } public void OnChanged(object source, FileSystemEventArgs e) { scannerListBox.Items.Add(e.FullPath); scannerListBox.SelectedIndex = scannerListBox.Items.Count - 1; FileMove(scannerListBox.SelectedItem.ToString()); } public void FileMove(string filePath) { try { System.IO.File.Copy(filePath, @"\\share\Data\Scans op OCE 600\" + Path.GetFileName(filePath)); } catch (Exception ex) { ToolLabel.Text = ex.Message.ToString(); } } } } 

}

搞定了。

 public void OnChanged(object source, FileSystemEventArgs e) { try { watcher.EnableRaisingEvents = false; FileInfo objFileInfo = new FileInfo(e.FullPath); if (!objFileInfo.Exists) return; System.Threading.Thread.Sleep(5000); FileInfo fileinformatie = new FileInfo(e.FullPath); string strCreateTime = fileinformatie.CreationTime.ToString(); string strCreateDate = fileinformatie.CreationTime.ToString(); strCreateTime = strCreateTime.Remove(strCreateTime.LastIndexOf(" ")); strCreateDate = strCreateDate.Remove(0,strCreateDate.LastIndexOf(" ")); ProcessAllFiles(e.FullPath, strCreateTime, strCreateDate); } catch (Exception ex) { ToolLabel.Text = ex.Message.ToString(); } finally { watcher.EnableRaisingEvents = true; } } 

Answer 1

您需要跟踪FileSystemWatcher已经引发事件的文件（在集合或字典中）。 根据MSDN

常见的文件系统操作可能会引发多个事件。 例如，当文件从一个目录移动到另一个目录时，可能会引发几个OnChanged和一些OnCreated和OnDeleted事件。 移动文件是一项复杂的操作，由多个简单操作组成，因此可以引发多个事件。 同样，某些应用程序（例如，防病毒软件）可能会导致FileSystemWatcher检测到其他文件系统事件。

Answer 2

 public void OnChanged(object source, FileSystemEventArgs e) { try { watcher.EnableRaisingEvents = false; FileInfo objFileInfo = new FileInfo(e.FullPath); if (!objFileInfo.Exists) return; System.Threading.Thread.Sleep(5000); FileInfo fileinformatie = new FileInfo(e.FullPath); string strCreateTime = fileinformatie.CreationTime.ToString(); string strCreateDate = fileinformatie.CreationTime.ToString(); //Ignore this, only for my file information. strCreateTime = strCreateTime.Remove(strCreateTime.LastIndexOf(" ")); strCreateDate = strCreateDate.Remove(0,strCreateDate.LastIndexOf(" ")); ProcessAllFiles(e.FullPath, strCreateTime, strCreateDate); } catch (Exception ex) { ToolLabel.Text = ex.Message.ToString(); } finally { watcher.EnableRaisingEvents = true; } }