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Issue in accesing the drive using Directory.GetFiles in C#

Posted on 2009-04-06
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2,072 Views
Last Modified: 2013-12-17
HI,
I am writing a program to find all the files with the specified filter. The program works fine if i give path to some folder, but throws an exception if i pass the drive letter as parameter. Can you please help me resolve this problem?
I am getting error UnauthorizedAccessException: Access to the path 'E:\System Volume Information' is denied.
string[] FileNames = Directory.GetFiles("E:\\","*.chm", SearchOption.AllDirectories);            
            foreach (string FullPath in FileNames)
            {                
                FileInfo file = new FileInfo(FullPath);
                string Path = file.DirectoryName;
                string FileName = file.Name;
                checkedListBox1.Items.Add(FileName);
            }

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Question by:yamurthy
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7 Comments
 
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Expert Comment

by:SaedSalman
ID: 24078617
you do not have access to "System Volume Information"
Solution:
except "System Volume Information" from your code.
Or, to avide each and every inaccessable file: you have to you use try catch block as follows:

try
{
string[] FileNames = Directory.GetFiles("E:\\","*.chm", SearchOption.AllDirectories);            
            foreach (string FullPath in FileNames)
            {                
                FileInfo file = new FileInfo(FullPath);
                string Path = file.DirectoryName;
                string FileName = file.Name;
                checkedListBox1.Items.Add(FileName);
            }
}
catch(UnauthorizedAccessException){//do nothing}

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Author Comment

by:yamurthy
ID: 24079627
i did use try and catch to avoid the exception. but my criteria will not be solved. i want to gain access to the drive so that i want to search all the files and folders in that drive.
i want to somehow get access. i have admin privilages in my system, but still unable to do this :(
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LVL 6

Expert Comment

by:SaedSalman
ID: 24079685
Do not know why accessing this folder ;-)
But here is what you are looking for:
http://support.microsoft.com/kb/309531
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LVL 6

Expert Comment

by:SaedSalman
ID: 24079725
this will solve "System Volume Information" problem
string[] FileNames = Directory.GetFiles("E:\\","*.chm", SearchOption.AllDirectories);            
            foreach (string FullPath in FileNames)
            {                
                FileInfo file = new FileInfo(FullPath);
                string Path = file.DirectoryName;
                string FileName = file.Name;
                if(FileName == "System Volume Information")   //Except System Volume Information folder
                       continue;
                checkedListBox1.Items.Add(FileName);
            }

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Expert Comment

by:Cebik
ID: 24082749
this don't fix the problem..
exception will throw in 1 line..
(not if you change access to directory but it isn't good idea [http://support.microsoft.com/kb/309531])
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LVL 6

Accepted Solution

by:
Cebik earned 250 total points
ID: 24082853
this one will work good

namespace ConsoleApplication1
{
    class Program
    {
        public static void Main(string[] args)
        {
            ArrayList items = new ArrayList();
 
            // Modify the path to work on your machine
            FindFile(@"X:\",
             "*.cs", items);
 
            Console.WriteLine("Files found - {0}", items.Count);
            foreach (FoundFile file in items)
                Console.WriteLine("File {0} - Full Path {1}", file.Name, file.FullPath);
        }
 
        public static void FindFile(string dir, string file, ArrayList items)
        {
            DirectoryInfo di = new DirectoryInfo(dir);
            try
            {
                DirectoryInfo[] subs = di.GetDirectories();
 
                foreach (DirectoryInfo sub in subs)
                    FindFile(sub.FullName, file, items);
 
                FileInfo[] files = di.GetFiles(file);
                foreach (FileInfo info in files)
                    items.Add(new FoundFile(info.Name, info.FullName));
            }
            catch (UnauthorizedAccessException)
            {
            }
        }
 
    }
 
    public struct FoundFile
    {
        private readonly string mName;
        private readonly string mFullPath;
 
        public string Name
        {
            get { return mName; }
        }
 
        public string FullPath
        {
            get { return mFullPath; }
        }
 
        public FoundFile(string name, string fullPath)
        {
            mName = name;
            mFullPath = fullPath;
        }
    }
}

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Author Closing Comment

by:yamurthy
ID: 31567050
Thanks a lot. works fine.
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