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Directory.GetFileSystemEntries 方法 (String)

返回指定目录中所有文件和子目录的名称。

命名空间:  System.IO
程序集:  mscorlib(在 mscorlib.dll 中)

public static string[] GetFileSystemEntries(
	string path
)

参数

path
类型:System.String
为其返回文件名和子目录名的目录。

返回值

类型:System.String[]
指定目录中的文件和子目录的名称的数组。

异常条件
UnauthorizedAccessException

调用方没有所要求的权限。

ArgumentException

path 是一个零长度字符串,仅包含空白或者包含一个或多个由 InvalidPathChars 定义的无效字符。

ArgumentNullException

pathnull

PathTooLongException

指定的路径、文件名或者两者都超出了系统定义的最大长度。 例如,在基于 Windows 的平台上,路径必须小于 248 个字符,文件名必须小于 260 个字符。

IOException

path 是一个文件名。

DirectoryNotFoundException

指定的路径无效(例如,它位于未映射的驱动器上)。

The EnumerateFileSystemEntries and GetFileSystemEntries methods differ as follows: When you use EnumerateFileSystemEntries, you can start enumerating the collection of entries before the whole collection is returned; when you use GetFileSystemEntries, you must wait for the whole array of entries to be returned before you can access the array. Therefore, when you are working with many files and directories, EnumerateFiles can be more efficient.

This method is identical to GetFileSystemEntries with the asterisk (*) specified as the search pattern.

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see GetCurrentDirectory.

The path parameter is not case-sensitive.

For a list of common I/O tasks, see 通用 I/O 任务.

The following example uses the GetFileSystemEntries method to fill an array of strings with the names of all files and subdirectories in a user-specified location and prints each string in the array to the console. The example is configured to catch all errors common to this method.


using System;

namespace GetFileSystemEntries
{
    class Class1 
    {
        static void Main(string[] args) 
        {
            Class1 snippets = new Class1();

            string path = System.IO.Directory.GetCurrentDirectory();
            string filter = "*.exe";

            snippets.PrintFileSystemEntries(path);
            snippets.PrintFileSystemEntries(path, filter);		
            snippets.GetLogicalDrives();
            snippets.GetParent(path);
            snippets.Move("C:\\proof", "C:\\Temp");
        }

		
        void PrintFileSystemEntries(string path) 
        {
			
            try 
            {
                // Obtain the file system entries in the directory path.
                string[] directoryEntries =
                    System.IO.Directory.GetFileSystemEntries(path); 

                foreach (string str in directoryEntries) 
                {
                    System.Console.WriteLine(str);
                }
            }
            catch (ArgumentNullException) 
            {
                System.Console.WriteLine("Path is a null reference.");
            }
            catch (System.Security.SecurityException) 
            {
                System.Console.WriteLine("The caller does not have the " +
                    "required permission.");
            }
            catch (ArgumentException) 
            {
                System.Console.WriteLine("Path is an empty string, " +
                    "contains only white spaces, " + 
                    "or contains invalid characters.");
            }
            catch (System.IO.DirectoryNotFoundException) 
            {
                System.Console.WriteLine("The path encapsulated in the " + 
                    "Directory object does not exist.");
            }
        }
        void PrintFileSystemEntries(string path, string pattern) 
        {
            try 
            {
                // Obtain the file system entries in the directory
                // path that match the pattern.
                string[] directoryEntries =
                    System.IO.Directory.GetFileSystemEntries(path, pattern); 

                foreach (string str in directoryEntries) 
                {
                    System.Console.WriteLine(str);
                }
            }
            catch (ArgumentNullException) 
            {
                System.Console.WriteLine("Path is a null reference.");
            }
            catch (System.Security.SecurityException) 
            {
                System.Console.WriteLine("The caller does not have the " +
                    "required permission.");
            }
            catch (ArgumentException) 
            {
                System.Console.WriteLine("Path is an empty string, " +
                    "contains only white spaces, " + 
                    "or contains invalid characters.");
            }
            catch (System.IO.DirectoryNotFoundException) 
            {
                System.Console.WriteLine("The path encapsulated in the " + 
                    "Directory object does not exist.");
            }
        }

        // Print out all logical drives on the system.
        void GetLogicalDrives() 
        {
            try 
            {
                string[] drives = System.IO.Directory.GetLogicalDrives();

                foreach (string str in drives) 
                {
                    System.Console.WriteLine(str);
                }
            }
            catch (System.IO.IOException) 
            {
                System.Console.WriteLine("An I/O error occurs.");
            }
            catch (System.Security.SecurityException) 
            {
                System.Console.WriteLine("The caller does not have the " +
                    "required permission.");
            }
        }
        void GetParent(string path) 
        {
            try 
            {
                System.IO.DirectoryInfo directoryInfo =
                    System.IO.Directory.GetParent(path);

                System.Console.WriteLine(directoryInfo.FullName);
            }
            catch (ArgumentNullException) 
            {
                System.Console.WriteLine("Path is a null reference.");
            }
            catch (ArgumentException) 
            {
                System.Console.WriteLine("Path is an empty string, " +
                    "contains only white spaces, or " +
                    "contains invalid characters.");
            }
        }
        void Move(string sourcePath, string destinationPath) 
        {
            try 
            {
                System.IO.Directory.Move(sourcePath, destinationPath);
                System.Console.WriteLine("The directory move is complete.");
            }
            catch (ArgumentNullException) 
            {
                System.Console.WriteLine("Path is a null reference.");
            }
            catch (System.Security.SecurityException) 
            {
                System.Console.WriteLine("The caller does not have the " +
                    "required permission.");
            }
            catch (ArgumentException) 
            {
                System.Console.WriteLine("Path is an empty string, " +
                    "contains only white spaces, " + 
                    "or contains invalid characters.");	
            }
            catch (System.IO.IOException) 
            {
                System.Console.WriteLine("An attempt was made to move a " +
                    "directory to a different " +
                    "volume, or destDirName " +
                    "already exists."); 
            }
        }
    }
}


.NET Framework

受以下版本支持:4.5、4、3.5、3.0、2.0、1.1、1.0

.NET Framework Client Profile

受以下版本支持:4、3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008(不支持服务器核心角色), Windows Server 2008 R2(支持带 SP1 或更高版本的服务器核心角色;不支持 Itanium)

并不是.NET Framework 对每个平台的所有版本都提供支持。有关支持的版本的列表,请参见.NET Framework 系统要求.

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