C#如何查询某一目录中所有文件

Question

要想查询某一目录中所有文件，找到一个就输出文件名，我写了以下代码，请大家帮我改正下，谢谢！static void FindFile(string path)
        {
            try
            {
                foreach (string d in Directory.GetDirectories(path))
                {
                    foreach (string f in Directory.GetFiles(d))
                    {
                        FileInfo fi = new FileInfo(f);
                        Console.WriteLine("{0}", Directory.GetFiles(path));
                    }
                    FindFile(d); //递归查询
                }
            }
            catch 
            {
            }

Answer 1

foreach (string fileName in Directory.GetFiles(folderPath,"*.*",SearchOption.AllDirectories))
            {
                FileInfo newFile = new FileInfo(fileName);
            }

Answer 2

 static void FindFile(string path)
        {
            DirectoryInfo di = new DirectoryInfo(path);       
            if (!di.Exists)
            {
                Console.WriteLine("The path :" + path + "is not exist!");
                return;
            }
            try
            {                foreach (FileInfo f in di.GetFiles())
                    Console.WriteLine(f.FullName);
                foreach (DirectoryInfo d in di.GetDirectories())
                    FindFile(di.FullName);
            }
            catch
            {
            }
        }

Answer 3

//在Directory.GetFiles(d)之前判断一下，d是不是目录
//Console.WriteLine("{0}", Directory.GetFiles(path)); 这个输出有点问题...foreach (string d in Directory.GetDirectories(path))
{
  if(File.Exists(d))
  {
    ProcessFile(path); 
  }
  else if(Directory.Exists(d)) 
  {
    ProcessDirectory(path);
  }
  else 
  {
    Console.WriteLine("{0} is not a valid file or directory.", d);
  }  
}
public static void ProcessDirectory(string targetDirectory) 
{        string [] fileEntries = Directory.GetFiles(targetDirectory);
        foreach(string fileName in fileEntries)
            ProcessFile(fileName);        string [] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
        foreach(string subdirectory in subdirectoryEntries)
            ProcessDirectory(subdirectory);
}public static void ProcessFile(string path) 
{
    Console.WriteLine("file:{0}", path);     
}

Answer 4

两种方式都可以,MSDN上搜索下DirectoryInfo..::.GetFileSystemInfos 方法 和                         Directory..::.GetDirectories 方法 (String) ，例子都还不错
try
{
    DirectoryInfo dir = new DirectoryInfo(directory);    if (!dir.Exists)
    {
         throw new DirectoryNotFoundException("The directory does not exist.");
    }    // Call the GetFileSystemInfos method.
    FileSystemInfo[] infos = dir.GetFileSystemInfos();    Console.WriteLine("Working...");    // Pass the result to the ListDirectoriesAndFiles
    // method defined below.
    ListDirectoriesAndFiles(infos);}
catch (Exception e)
{
       Console.WriteLine(e.Message);
}static void ListDirectoriesAndFiles(FileSystemInfo[] FSInfo)
    {
        // Check the FSInfo parameter.
        if (FSInfo == null)
        {
            throw new ArgumentNullException("FSInfo");
        }        // Iterate through each item.
        foreach (FileSystemInfo i in FSInfo)
        {
            // Check to see if this is a DirectoryInfo object.
            if (i is DirectoryInfo)
            {                // Cast the object to a DirectoryInfo object.
                DirectoryInfo dInfo = (DirectoryInfo)i;                // Iterate through all sub-directories.
                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos());
            }
            // Check to see if this is a FileInfo object.
            else if (i is FileInfo)
            {
                 Console.WriteLine("file:{0}", i.ToString());        
            }
        }
}