找不到FileSystemEntry的名称空间 [英] Unable to find namespace for FileSystemEntry

问题描述

我找不到FileSystemEntry的名称空间.谁能帮我一个忙?

I can''t find namespace for FileSystemEntry. Who can do me a favor?

using System;
using System.IO;
using System.Security;
namespace DosAPI1
{
	class MyExplorer
	{
		public static void Main(string[] args)
		{
			MyExplorer oExplorer=new MyExplorer();
			string Command;
			string[] CommandLineArgs;
			int ArgumentLength;
			bool CanExit=false;
			Console.WriteLine("Welcome to the MyExplorer Dos Utility");
			do
			{
				Console.Write("MyExplorer>");
				Command=Console.ReadLine ();
				Command=ToSingleSpace(Command.Trim().ToLower());
				CommandLineArgs=oExplorer.ParseCommand(Command.ToLower(),out ArgumentLength);
				switch(CommandLineArgs[0])
				{
					case"cpy":
						if(ArgumentLength!=2)
						{
							ShowError("Usage cpy<source><dest>");
						}
						else
						{
							oExplorer.Copy(CommandLineArgs[1],CommandLineArgs[2]);
						}
						break;
					case"rem":
						if(ArgumentLength!=1)
						{
							ShowError("Usage rem<filename>");
						}
						else
						{
							oExplorer.Remove(CommandLineArgs[1]);
						}
						break;
					case"dir":
					case"ls":
					      switch(ArgumentLength)
					         {
							  case 0:
								  oExplorer.ListFiles(".");
								  break;
							  case 1:
								  oExplorer.ListFiles(CommandLineArgs[1]);
							      break;
							  default:
								  ShowError("Usage dir[<path>]");
								  break;
					         }
						break;
					case "help":
					case "h":
						oExplorer.ShowHelp();
						break;
					case "quit":
					case "exit":
					case "bye":
						CanExit = true;
					  break;
					default:
						 ShowError("Invalid Command");
						break;
				}
			}while(!CanExit);
		}
		public static void ShowError(string StrError)
		{
			Console.WriteLine(StrError);
		}
		public static string ToSingleSpace(string StrToReplace)
		{
			int Position;
			Position=StrToReplace.IndexOf(" ");
			if(Position==-1)
			  return StrToReplace;
			else 
			  return ToSingleSpace(StrToReplace.Substring(0,Position)+StrToReplace.Substring(Position+1));
        }
		public string[] ParseCommand(string Command,out int ArgumentLength)
		{
			string[] CommandLineArgs=Command.Split(new char[]{' '});
			ArgumentLength=CommandLineArgs.Length-1;
            return CommandLineArgs;
		}
		/* Function to the Usage of MyExplorer*/
		public void ShowHelp()
		{
			Console.WriteLine("MyExplorer Help Contents");
			Console.WriteLine("-------------------------");
			Console.WriteLine("cpy<source><dest>-Copies the content of source to dest");
            Console.WriteLine("rem<filename>    -Filename to be deleted");
			Console.WriteLine("dir/ls[<path>]   -Directory Listing");
			Console.WriteLine("h/help           -Help for using MyExplorer");
			Console.WriteLine("quit/exit/bye    -Exit MyExplorer");
		}
		/* Method to perform File Copy operation*/
		public void Copy(string SourceFile,string DestinationFile)
		{
			try
			{
				File.Copy(SourceFile,DestinationFile,true);
				Console.WriteLine("File Copied Successfully");
			}
			catch(FileNotFoundException)
			{
				Console.WriteLine("Source File does not Exists");
			}
			catch(ArgumentException)
			{
				Console.WriteLine("Invalid Argument for cpy");
			}
			catch(SecurityException)
			{
				Console.WriteLine("Write Access is Denied");
			}
			catch(Exception)
			{
				Console.WriteLine("UnKnown Exception");
			}
		}
		/* Function to Delete the Specified File*/
		public void Remove(string FileToRemove)
		{
			try
			{
				File.Delete(FileToRemove);
				Console.WriteLine("File Removed Successfully");
			}
			catch(DirectoryNotFoundException)
			{
				Console.WriteLine("File does not exists");
			}
			catch(SecurityException)
			{
				Console.WriteLine("Delete Permission Denied");
			}
			catch(AccessException)
			{
				Console.WriteLine("Directory name is specified where file is required");
			}
			catch(Exception)
			{
				Console.WriteLine("UnKnown Exception");
			}
		}
        /* Directory Listing*/
		public void ListFiles(string StrDirectoryToList)
		{
            Directory oDir;
			FileSystemEntry[] oFiles;
			try
			{   
				oDir=new Directory(StrDirectoryToList);
				oFiles=oDir.GetFileSystemEntries();
				bool IsFileFound = true;
				foreach(FileSystemEntry f in oFiles)
				{
					if(IsFileFound)
					{
						Console.WriteLine("{0,-32}{1,8}{2}","Name","Size","Directory/File");
						Console.WriteLine(new string('=',80));
							IsFileFound=false;
					}
					if(f.IsFile)
					{
						Console.WriteLine("{0,-32}{1,8}{2}",f.Name,((File)f).Length,"F");
					}
					else 
					{
						Console.WriteLine("{0,-32}{1,8}{2}",f.Name,"0","F");
					}
				}
				
				
			}
			catch(DirectoryNotFoundException)
			{
				Console.WriteLine("Directory Not Found");
			}
			catch(Exception)
			{
			}
		}
	}
}

推荐答案

FileSystemEntry 类在.net API中不存在.

在您的情况下，以下语句返回字符串数组，而不是FileSystemEntry类的数组

FileSystemEntry class is not present in the .net API.

In your case following statement returns an array of string not the array of FileSystemEntry class

oFiles = oDir.GetFileSystemEntries();

因此，在您的代码中而不是使用

So in your code instead of using

FileSystemEntry[] oFiles;

您应该使用

You should be using

string[] oFiles;

它似乎不是.NET类.而是似乎是Dundas API类.

在这里检查

http://support.dundas.com/public/Dashboard /2_0/客户端/(S(unl3yu45iabwyhfsx0w4zx45))/html/T_Dundas_Dashboard_Framework_FileSystem_FileSystemEntry.htm

否则，请按照prakash的建议进行操作.也应该没事.

It does not seems a .NET class. Rather it seems a Dundas API class.

Check here

http://support.dundas.com/public/Dashboard/2_0/Client/(S(unl3yu45iabwyhfsx0w4zx45))/html/T_Dundas_Dashboard_Framework_FileSystem_FileSystemEntry.htm

Otherwise, follow what prakash has suggested. That should be fine too.

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