获得并处理一个文件夹下的所有文件

.netFrameWork给我们提供了很多良好的文件操作类。

其中有一个地址操作类叫做Directory，其是一个静态类，使用这个类，将节省实例化的时间。

要获得一个文件夹下的所有文件，大约有两种方式：

（1）直接调用Directory类的静态方法。 string[] Directory.GetFiles(三个参数);其中第三个参数确定是否包含子目录




GetFiles(string path, string searchPattern, SearchOption searchOption)#region GetFiles(string path, string searchPattern, SearchOption searchOption)


//


// Summary:


// Returns the names of files in the specified directory that match the specified


// search pattern, using a value to determine whether to search subdirectories.


//


// Parameters:


// searchOption:


// One of the System.IO.SearchOption values that specifies whether the search


// operation should include all subdirectories or only the current directory.


//


// path:


// The directory to search.


//


// searchPattern:


// The search string to match against the names of files in path. The parameter


// cannot end in two periods ("..") or contain two periods ("..") followed by


// System.IO.Path.DirectorySeparatorChar or System.IO.Path.AltDirectorySeparatorChar,


// nor can it contain any of the characters in System.IO.Path.InvalidPathChars.


//


// Returns:


// A String array containing the names of files in the specified directory that


// match the specified search pattern. File names include the full path.


//


// Exceptions:


// System.UnauthorizedAccessException:


// The caller does not have the required permission.


//


// System.ArgumentNullException:


// path or searchpattern is null.


//


// System.IO.IOException:


// path is a file name.


//


// System.ArgumentException:


// path is a zero-length string, contains only white space, or contains one


// or more invalid characters as defined by System.IO.Path.InvalidPathChars.


// -or- searchPattern does not contain a valid pattern.


//


// System.IO.PathTooLongException:


// The specified path, file name, or both exceed the system-defined maximum


// length. For example, on Windows-based platforms, paths must be less than


// 248 characters and file names must be less than 260 characters.


//


// System.IO.DirectoryNotFoundException:


// The specified path is invalid (for example, it is on an unmapped drive).


public static string[] GetFiles(string path, string searchPattern, SearchOption searchOption);


#endregion

（2）使用递归程序:找到其中的所有的子文件夹，子文件夹再调用函数本身获得其中的文件名。

使用两个函数string[] Directory.GetFiles()//三个参数，这里空着第三个参数,

和获得 子目录的函数 public static string[] GetDirectories(string path);