当出现错误时directory.getfiles停止搜索

Question

I have this code witch works perfectly on my dev enviroment:

String[] FileNames = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories).Where(s => s.EndsWith(".bak") || s.EndsWith(".dwg")).ToArray();
var queryDupNames = from f in FileNames
                    group f by Path.GetFileNameWithoutExtension(f) into g
                    where g.Count() > 1
                    select new { Name = g.Key, FileNames = g }
                 ;
var lista = queryDupNames.ToList();

With this code I´m looking for files with the same name and different extension (bak and dwg). When I tried this with my company mapped drive I got this error:

Excepción no controlada: System.IO.DirectoryNotFoundException: No se puede encontrar una parte de la ruta de acceso 'O:\auskalononden\sistema de gestion\mantenimiento\01.-Maquinas y utiles\COMPROBADORAS\utiles y maquinas sin presion ni agua original\Deapnelizadora de alimantacion CODIGO-- ESPAÑA-- FRANCIA\JAULA GIRONA ESPAÑA FRANCIA\Jaula de utensilios KIDJQd sC-22\4403.-repu'.
   en System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   en System.IO.Directory.InternalGetFileDirectoryNames(String path, String userPathOriginal, String searchPattern, Boolean includeFiles, Boolean includeDirs, SearchOption searchOption)
   en System.IO.Directory.GetFiles(String path, String searchPattern, SearchOption searchOption)
   en bakdwg.Program.Main(String[] args) en D:\dev\bakdwg\bakdwg\Program.cs:línea 19

Is there any whay to tell: if you have an error with this path, follow with next path? or something?

Answer 1

That path has 261 characters. The normal Win32 APIs max out at 260 ( MAX_PATH ) and there is no support in .NET for Win32's long path support (you can P/Invoke but that means doing all the operations on that file/directory that way).

Answer 2

As per my comment, the error occurs because your file path is too long. As @Richard comments, you could use Win32 APIs directly to get around this limit. However, personnally I prefer to use the Delimon.Win32.IO C# library from TechNet. This library replaces basic file functions of System.IO and supports File & Folder names up to up to 32,767 Characters. See a basic code example below:

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

// Specifically adding the Delimon.Win32.IO Library to use in the current Code Page 
using Delimon.Win32.IO; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            string[] files = Directory.GetFiles(@"c:\temp"); 
            foreach (string file in files) 
            { 
                Console.WriteLine(file); 
            } 
            Console.ReadLine(); 
        } 
    } 
}