我有这段代码被重复了 3 次:
private static void convert(object source, FileSystemEventArgs f)
{
string FileName;
FileName = f.FullPath;
string destinationFile = @"Y:\test\test.xml";
System.Threading.Thread.Sleep(2000);
try
{
Encoding utf8 = new UTF8Encoding(false);
Encoding ansi = Encoding.GetEncoding(1256);
System.Threading.Thread.Sleep(2000);
string xml = File.ReadAllText(FileName, ansi);
XDocument xmlDoc = XDocument.Parse(xml);
**Console.WriteLine("1st");**
File.WriteAllText(
destinationFile,
@"<?xml version=""1.0"" encoding=""utf-8""?>" + xmlDoc.ToString(),
utf8
);
}
检查上面的粗体。它写了3次。我刚刚对它进行了测试。但是为什么写了3次。。也就是说正在写入的文件也写了3次。
我从 filesystemwatcher 函数调用此函数来监视文件夹是否已更改,然后将文件转换为 utf-8 并将其放入目标文件中。
编辑 1: 这是我的观察者。你能检查一下这是否正常吗:
private static void WatchFile()
{
watcher.Path = @"C:\project";
watcher.NotifyFilter = NotifyFilters.LastWrite;
watcher.Filter = "*.xml";
watcher.Changed += new FileSystemEventHandler(convert);
watcher.Error += new ErrorEventHandler(WatcherError);
Console.WriteLine("2nd");
watcher.EnableRaisingEvents = true;
}
仍然不知道为什么它会重复 3 次。
编辑 2:
这是我的完整代码:
using System;
using System.IO;
using System.Text;
using System.Xml;
using System.Xml.Linq;
using System.Collections.Generic;
using System.Linq;
class Test
{
class Class1
{
private static FileSystemWatcher watcher =
new FileSystemWatcher();
public static void Main()
{
WatchFile();
Console.ReadLine();
}
private static void WatchFile()
{
watcher.Path = @"C:\project";
watcher.NotifyFilter = NotifyFilters.LastWrite;
watcher.Filter = "*.xml";
watcher.Changed += new FileSystemEventHandler(convert);
watcher.Error += new ErrorEventHandler(WatcherError);
Console.WriteLine("2nd");
watcher.EnableRaisingEvents = true;
}
public static string CrL = "\r\n";
private static void convert(object source, FileSystemEventArgs f)
{
string FileName;
FileName = f.FullPath;
string destinationFile = @"Y:\test\OnAirNow.xml";
System.Threading.Thread.Sleep(2000);
try
{
Encoding utf8 = new UTF8Encoding(false);
Encoding ansi = Encoding.GetEncoding(1256);
System.Threading.Thread.Sleep(2000);
string xml = File.ReadAllText(FileName, ansi);
XDocument xmlDoc = XDocument.Parse(xml);
Console.WriteLine("1st");
File.WriteAllText(
destinationFile,
@"<?xml version=""1.0"" encoding=""utf-8""?>" + xmlDoc.ToString(),
utf8
);
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
private static void WatcherError(object source, ErrorEventArgs e)
{
Exception watchException = e.GetException();
watcher = new FileSystemWatcher();
while (!watcher.EnableRaisingEvents)
{
try
{
WatchFile();
Console.WriteLine("I'm Back!!");
}
catch
{
System.Threading.Thread.Sleep(2000);
}
}
}
}
}
最佳答案
使用 FileSystemWatcher
的常见模式是在开始处理事件时将 EnableRaisingEvents
设置为 false
:
this.fileSystemWatcher = new FileSystemWatcher()
{
Path = AppDomain.CurrentDomain.SetupInformation.ApplicationBase,
NotifyFilter = NotifyFilters.LastWrite,
Filter = Path.GetFileName(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile)
};
this.fileSystemWatcher.Changed += this.ConfigChanged;
this.fileSystemWatcher.EnableRaisingEvents = true;
和
public void ConfigChanged(object sender, FileSystemEventArgs e)
{
try
{
this.fileSystemWatcher.EnableRaisingEvents = false;
s_logger.Info("Configuration file changed.");
// reload config here
s_logger.Info("Configuration settings reloaded.");
}
catch (Exception exception)
{
s_logger.Error(exception.Message);
s_logger.Error("Failed to reload configuration settings.");
}
finally
{
this.fileSystemWatcher.EnableRaisingEvents = true;
}
}
关于c# - 文件写入 3 次 C#,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14316308/