C#帮助-FileSystemWatcher类

我有以下代码，尽管我正在尝试输出：

fileWriter.Write(e.OldName + " was renamed to " + e.Name + Environment.NewLine);

虽然我得到以下错误：

当前上下文中不存在名称“e”

我的代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace FileWatcherr
{
class Program
{    
    static void Main(string[] args)
    {
        string dirPath = "C:\\";
        FileSystemWatcher fileWatcher = new FileSystemWatcher(dirPath); 
        fileWatcher.IncludeSubdirectories = true;  
        fileWatcher.Filter = "*.exe";    
        // fileWatcher.Filter = "C:\\$Recycle.Bin";   
        //  fileWatcher.Changed += new FileSystemEventHandler(FileWatcher_Changed);   
        fileWatcher.Created += new FileSystemEventHandler(FileWatcher_Created);    
        //  fileWatcher.Deleted += new FileSystemEventHandler(FileWatcher_Deleted);  
        //  fileWatcher.Renamed += new RenamedEventHandler(FileWatcher_Renamed);    
        fileWatcher.EnableRaisingEvents = true;      

        // updated code
        using(StreamWriter fileWriter = new StreamWriter("test2.txt"))
        {
            var data = true;
            fileWriter.Write(e.OldName + " was renamed to " + e.Name + Environment.NewLine);
        }

        Console.ReadKey(); 
    }



        static void FileWatcher_Renamed(object sender, RenamedEventArgs e)
        {
            Console.WriteLine(e.OldName + " was renamed to " + e.Name);
        }

        static void FileWatcher_Deleted(object sender, FileSystemEventArgs e)
        {
            Console.WriteLine(e.Name + " was deleted");
        }

        static void FileWatcher_Created(object sender, FileSystemEventArgs e)
        {
            Console.WriteLine("C:\\" + e.Name);
        }

        static void FileWatcher_Changed(object sender, FileSystemEventArgs e)
        {
            Console.WriteLine(e.Name + "");
        }
    }
}

---

从代码中可以看出，main方法中包含重命名事件的代码，该方法不包含FileSystemEventArgs对象（称为“e”）

---

我认为要解决这个问题，您应该将“FileWatcher\u重命名”的主体更改为using块。

e引用事件方法的

EventArgs

参数

如果你这样说：

using(StreamWriter fileWriter = new StreamWriter("test2.txt"))
    {
        var data = true;
        fileWriter.Write(e.OldName + " was renamed to " + e.Name + Environment.NewLine);
    }

在

static void FileWatcher_Renamed(object sender, RenamedEventArgs e)

---

方法，它应该可以工作。

这正是错误所说的。主方法中没有名为“e”的变量。@JackMc如何将“e”变量添加到主方法？星际迷航闪回；在这篇文章中，'-to-Programmer'的比例很高。制作信息技术走吧，我觉得你是新来的。也许您应该首先回顾事件处理的基本知识。您好，我如何在main方法中添加名为e的FileSystemEventArgs对象？@Michael FileSystemEventArgs对象将传递给FileSystemWatcher类的不同事件。我在上面的一个解决方案中进行了编辑。“我认为要解决这个问题，您应该将“FileWatcher_重命名”的主体更改为using块。”我这样做了，它复制ok，但不输出文件：S@Michael：确保代码中的这一行未被注释掉：fileWatcher.Rename+=新重命名的EventHandler（fileWatcher_重命名）；