I Need to find my pictures in my User folder. But I get the runtime error Access Denied
Here is my code
static void Main(string[] args)
{
string pic = "*.jpg";
string b = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
string appdata = Path.Combine(b, "AppData"); // I Dont want search in this folder.
string data = Path.Combine(b, "Data aplikací"); // Here also not.
foreach (string d in Directory.GetDirectories(b))
{
try
{
if ((d == data) || (d == appdata))
{
continue;
}
else
{
foreach (string f in Directory.GetFiles(d, pic))
{
//...
}
}
}
catch (System.Exception excpt)
{
Console.WriteLine(excpt.Message);
}
}
}
Running the application as admin doesn't work either. How to avoid this?
check if the folder is read only (in windows) if it is, just clear the read only flag.
if it isn't read only, make sure that the admin user has full rights on that folder. You can check this by right clicking on the folder --> properties --> security
check out this link for more information on how to set it programatically:
C# - Set Directory Permissions for All Users in Windows 7
Oh, don't go changing your directory/folder permissions - that's just asking for future pain.
There's no "one-liner" solution here - basically, you need to recursively walk through the folder structure looking for the files you care about, and absorbing/eating the UnauthorizedAccessExceptions along the way (you could avoid the exception altogether by checking DirectoryInfo.GetAccessControl, but that's a whole different question)
Here's a blob o'code:
void Main()
{
var profilePath = Environment
.GetFolderPath(Environment.SpecialFolder.UserProfile);
var imagePattern = "*.jpg";
var dontLookHere = new[]
{
"AppData", "SomeOtherFolder"
};
var results = new List<string>();
var searchStack = new Stack<string>();
searchStack.Push(profilePath);
while(searchStack.Count > 0)
{
var path = searchStack.Pop();
var folderName = new DirectoryInfo(path).Name;
if(dontLookHere.Any(verboten => folderName == verboten))
{
continue;
}
Console.WriteLine("Scanning path {0}", path);
try
{
var images = Directory.EnumerateFiles(
path,
imagePattern,
SearchOption.TopDirectoryOnly);
foreach(var image in images)
{
Console.WriteLine("Found an image! {0}", image);
results.Add(image);
}
var subpaths = Directory.EnumerateDirectories(
path,
"*.*",
SearchOption.TopDirectoryOnly);
foreach (var subpath in subpaths)
{
searchStack.Push(subpath);
}
}
catch(UnauthorizedAccessException nope)
{
Console.WriteLine("Can't access path: {0}", path);
}
}
}
Related
I am trying to display a list of all files found in the selected directory (and optionally any subdirectories). The problem I am having is that when the GetFiles() method comes across a folder that it cannot access, it throws an exception and the process stops.
How do I ignore this exception (and ignore the protected folder/file) and continue adding accessible files to the list?
try
{
if (cbSubFolders.Checked == false)
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath);
foreach (string fileName in files)
ProcessFile(fileName);
}
else
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.*", SearchOption.AllDirectories);
foreach (string fileName in files)
ProcessFile(fileName);
}
lblNumberOfFilesDisplay.Enabled = true;
}
catch (UnauthorizedAccessException) { }
finally {}
You will have to do the recursion manually; don't use AllDirectories - look one folder at a time, then try getting the files from sub-dirs. Untested, but something like below (note uses a delegate rather than building an array):
using System;
using System.IO;
static class Program
{
static void Main()
{
string path = ""; // TODO
ApplyAllFiles(path, ProcessFile);
}
static void ProcessFile(string path) {/* ... */}
static void ApplyAllFiles(string folder, Action<string> fileAction)
{
foreach (string file in Directory.GetFiles(folder))
{
fileAction(file);
}
foreach (string subDir in Directory.GetDirectories(folder))
{
try
{
ApplyAllFiles(subDir, fileAction);
}
catch
{
// swallow, log, whatever
}
}
}
}
Since .NET Standard 2.1 (.NET Core 3+, .NET 5+), you can now just do:
var filePaths = Directory.EnumerateFiles(#"C:\my\files", "*.xml", new EnumerationOptions
{
IgnoreInaccessible = true,
RecurseSubdirectories = true
});
According to the MSDN docs about IgnoreInaccessible:
Gets or sets a value that indicates whether to skip files or directories when access is denied (for example, UnauthorizedAccessException or SecurityException). The default is true.
Default value is actually true, but I've kept it here just to show the property.
The same overload is available for DirectoryInfo as well.
This simple function works well and meets the questions requirements.
private List<string> GetFiles(string path, string pattern)
{
var files = new List<string>();
var directories = new string[] { };
try
{
files.AddRange(Directory.GetFiles(path, pattern, SearchOption.TopDirectoryOnly));
directories = Directory.GetDirectories(path);
}
catch (UnauthorizedAccessException) { }
foreach (var directory in directories)
try
{
files.AddRange(GetFiles(directory, pattern));
}
catch (UnauthorizedAccessException) { }
return files;
}
A simple way to do this is by using a List for files and a Queue for directories.
It conserves memory.
If you use a recursive program to do the same task, that could throw OutOfMemory exception.
The output: files added in the List, are organised according to the top to bottom (breadth first) directory tree.
public static List<string> GetAllFilesFromFolder(string root, bool searchSubfolders) {
Queue<string> folders = new Queue<string>();
List<string> files = new List<string>();
folders.Enqueue(root);
while (folders.Count != 0) {
string currentFolder = folders.Dequeue();
try {
string[] filesInCurrent = System.IO.Directory.GetFiles(currentFolder, "*.*", System.IO.SearchOption.TopDirectoryOnly);
files.AddRange(filesInCurrent);
}
catch {
// Do Nothing
}
try {
if (searchSubfolders) {
string[] foldersInCurrent = System.IO.Directory.GetDirectories(currentFolder, "*.*", System.IO.SearchOption.TopDirectoryOnly);
foreach (string _current in foldersInCurrent) {
folders.Enqueue(_current);
}
}
}
catch {
// Do Nothing
}
}
return files;
}
Steps:
Enqueue the root in the queue
In a loop, Dequeue it, Add the files in that directory to the list, and Add the subfolders to the queue.
Repeat untill the queue is empty.
see https://stackoverflow.com/a/10728792/89584 for a solution that handles the UnauthorisedAccessException problem.
All the solutions above will miss files and/or directories if any calls to GetFiles() or GetDirectories() are on folders with a mix of permissions.
Here's a full-featured, .NET 2.0-compatible implementation.
You can even alter the yielded List of files to skip over directories in the FileSystemInfo version!
(Beware null values!)
public static IEnumerable<KeyValuePair<string, string[]>> GetFileSystemInfosRecursive(string dir, bool depth_first)
{
foreach (var item in GetFileSystemObjectsRecursive(new DirectoryInfo(dir), depth_first))
{
string[] result;
var children = item.Value;
if (children != null)
{
result = new string[children.Count];
for (int i = 0; i < result.Length; i++)
{ result[i] = children[i].Name; }
}
else { result = null; }
string fullname;
try { fullname = item.Key.FullName; }
catch (IOException) { fullname = null; }
catch (UnauthorizedAccessException) { fullname = null; }
yield return new KeyValuePair<string, string[]>(fullname, result);
}
}
public static IEnumerable<KeyValuePair<DirectoryInfo, List<FileSystemInfo>>> GetFileSystemInfosRecursive(DirectoryInfo dir, bool depth_first)
{
var stack = depth_first ? new Stack<DirectoryInfo>() : null;
var queue = depth_first ? null : new Queue<DirectoryInfo>();
if (depth_first) { stack.Push(dir); }
else { queue.Enqueue(dir); }
for (var list = new List<FileSystemInfo>(); (depth_first ? stack.Count : queue.Count) > 0; list.Clear())
{
dir = depth_first ? stack.Pop() : queue.Dequeue();
FileSystemInfo[] children;
try { children = dir.GetFileSystemInfos(); }
catch (UnauthorizedAccessException) { children = null; }
catch (IOException) { children = null; }
if (children != null) { list.AddRange(children); }
yield return new KeyValuePair<DirectoryInfo, List<FileSystemInfo>>(dir, children != null ? list : null);
if (depth_first) { list.Reverse(); }
foreach (var child in list)
{
var asdir = child as DirectoryInfo;
if (asdir != null)
{
if (depth_first) { stack.Push(asdir); }
else { queue.Enqueue(asdir); }
}
}
}
}
This should answer the question. I've ignored the issue of going through subdirectories, I'm assuming you have that figured out.
Of course, you don't need to have a seperate method for this, but you might find it a useful place to also verify the path is valid, and deal with the other exceptions that you could encounter when calling GetFiles().
Hope this helps.
private string[] GetFiles(string path)
{
string[] files = null;
try
{
files = Directory.GetFiles(path);
}
catch (UnauthorizedAccessException)
{
// might be nice to log this, or something ...
}
return files;
}
private void Processor(string path, bool recursive)
{
// leaving the recursive directory navigation out.
string[] files = this.GetFiles(path);
if (null != files)
{
foreach (string file in files)
{
this.Process(file);
}
}
else
{
// again, might want to do something when you can't access the path?
}
}
I prefer using c# framework functions, but the function i need will be included in .net framework 5.0, so i have to write it.
// search file in every subdirectory ignoring access errors
static List<string> list_files(string path)
{
List<string> files = new List<string>();
// add the files in the current directory
try
{
string[] entries = Directory.GetFiles(path);
foreach (string entry in entries)
files.Add(System.IO.Path.Combine(path,entry));
}
catch
{
// an exception in directory.getfiles is not recoverable: the directory is not accessible
}
// follow the subdirectories
try
{
string[] entries = Directory.GetDirectories(path);
foreach (string entry in entries)
{
string current_path = System.IO.Path.Combine(path, entry);
List<string> files_in_subdir = list_files(current_path);
foreach (string current_file in files_in_subdir)
files.Add(current_file);
}
}
catch
{
// an exception in directory.getdirectories is not recoverable: the directory is not accessible
}
return files;
}
I'm having trouble deleting a folder with all files in it.
I get this error:
Could not find a part of the path
What I'm trying to accomplish is, getting the relative path from the database, and then deleting that folder with all files in it.
Here is the code:
public IActionResult RemoveCar(string item)
{
var car = _context.CarModels.Where(x => x.Id.ToString() == item).FirstOrDefault();
var pictures = _context.Pictures.Where(x => x.CarModelId.ToString() == item).ToList();
if(pictures.Count() > 0 && pictures != null)
{
string parent = new System.IO.DirectoryInfo(pictures[0].Path).Parent.ToString();
string lastFolderName = Path.GetFileName(Path.GetDirectoryName(parent+"/"));
string exactPath = Path.GetFullPath("/images/" + lastFolderName);
System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(exactPath);
// Delete this dir and all subdirs.
try
{
di.Delete(true);
}
catch (System.IO.IOException e)
{
Console.WriteLine(e.Message);
}
foreach (var pic in pictures)
{
_context.Pictures.Remove(pic);
}
}
_context.CarModels.Remove(car);
return RedirectToAction("RemoveCar");
}
I think the first slash in this line is the problem,
string exactPath = Path.GetFullPath("/images/" + lastFolderName);
as it means 'move to the root'. Leave it out if you want a relative path.
I have the following recursion code to get all the folders and files of a selected directory. But when I select a drive, for example E:\\ .., I am getting an error message of
"Access denied in accessing E:\system volume information"
Is it possible to bypass the system volume information folder?
This is the code I am using:
private static ArrayList GenerateFileList(string Dir)
{
ArrayList fils = new ArrayList();
bool Empty = true;
foreach (string file in Directory.GetFiles(Dir)) // add each file in directory
{
fils.Add(file);
Empty = false;
}
if (Empty)
{
if (Directory.GetDirectories(Dir).Length == 0)
// if directory is completely empty, add it
{
fils.Add(Dir + #"/");
}
}
foreach (string dirs in Directory.GetDirectories(Dir)) // recursive
{
foreach (object obj in GenerateFileList(dirs))
{
fils.Add(obj);
}
}
return fils; // return file list
}
private static ArrayList GenerateFileList(string Dir)
{
ArrayList fils = new ArrayList();
bool Empty = true;
try
{
foreach (string file in Directory.GetFiles(Dir)) // add each file in directory
{
fils.Add(file);
Empty = false;
}
}
catch(UnauthorizedAccessException e)
{
// I believe that's the right exception to catch - compare with what you get
return new ArrayList();
}
if (Empty)
{
if (Directory.GetDirectories(Dir).Length == 0)
// if directory is completely empty, add it
{
fils.Add(Dir + #"/");
}
}
foreach (string dirs in Directory.GetDirectories(Dir)) // recursive
{
foreach (object obj in GenerateFileList(dirs))
{
fils.Add(obj);
}
I am trying to display a list of all files found in the selected directory (and optionally any subdirectories). The problem I am having is that when the GetFiles() method comes across a folder that it cannot access, it throws an exception and the process stops.
How do I ignore this exception (and ignore the protected folder/file) and continue adding accessible files to the list?
try
{
if (cbSubFolders.Checked == false)
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath);
foreach (string fileName in files)
ProcessFile(fileName);
}
else
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.*", SearchOption.AllDirectories);
foreach (string fileName in files)
ProcessFile(fileName);
}
lblNumberOfFilesDisplay.Enabled = true;
}
catch (UnauthorizedAccessException) { }
finally {}
You will have to do the recursion manually; don't use AllDirectories - look one folder at a time, then try getting the files from sub-dirs. Untested, but something like below (note uses a delegate rather than building an array):
using System;
using System.IO;
static class Program
{
static void Main()
{
string path = ""; // TODO
ApplyAllFiles(path, ProcessFile);
}
static void ProcessFile(string path) {/* ... */}
static void ApplyAllFiles(string folder, Action<string> fileAction)
{
foreach (string file in Directory.GetFiles(folder))
{
fileAction(file);
}
foreach (string subDir in Directory.GetDirectories(folder))
{
try
{
ApplyAllFiles(subDir, fileAction);
}
catch
{
// swallow, log, whatever
}
}
}
}
Since .NET Standard 2.1 (.NET Core 3+, .NET 5+), you can now just do:
var filePaths = Directory.EnumerateFiles(#"C:\my\files", "*.xml", new EnumerationOptions
{
IgnoreInaccessible = true,
RecurseSubdirectories = true
});
According to the MSDN docs about IgnoreInaccessible:
Gets or sets a value that indicates whether to skip files or directories when access is denied (for example, UnauthorizedAccessException or SecurityException). The default is true.
Default value is actually true, but I've kept it here just to show the property.
The same overload is available for DirectoryInfo as well.
This simple function works well and meets the questions requirements.
private List<string> GetFiles(string path, string pattern)
{
var files = new List<string>();
var directories = new string[] { };
try
{
files.AddRange(Directory.GetFiles(path, pattern, SearchOption.TopDirectoryOnly));
directories = Directory.GetDirectories(path);
}
catch (UnauthorizedAccessException) { }
foreach (var directory in directories)
try
{
files.AddRange(GetFiles(directory, pattern));
}
catch (UnauthorizedAccessException) { }
return files;
}
A simple way to do this is by using a List for files and a Queue for directories.
It conserves memory.
If you use a recursive program to do the same task, that could throw OutOfMemory exception.
The output: files added in the List, are organised according to the top to bottom (breadth first) directory tree.
public static List<string> GetAllFilesFromFolder(string root, bool searchSubfolders) {
Queue<string> folders = new Queue<string>();
List<string> files = new List<string>();
folders.Enqueue(root);
while (folders.Count != 0) {
string currentFolder = folders.Dequeue();
try {
string[] filesInCurrent = System.IO.Directory.GetFiles(currentFolder, "*.*", System.IO.SearchOption.TopDirectoryOnly);
files.AddRange(filesInCurrent);
}
catch {
// Do Nothing
}
try {
if (searchSubfolders) {
string[] foldersInCurrent = System.IO.Directory.GetDirectories(currentFolder, "*.*", System.IO.SearchOption.TopDirectoryOnly);
foreach (string _current in foldersInCurrent) {
folders.Enqueue(_current);
}
}
}
catch {
// Do Nothing
}
}
return files;
}
Steps:
Enqueue the root in the queue
In a loop, Dequeue it, Add the files in that directory to the list, and Add the subfolders to the queue.
Repeat untill the queue is empty.
see https://stackoverflow.com/a/10728792/89584 for a solution that handles the UnauthorisedAccessException problem.
All the solutions above will miss files and/or directories if any calls to GetFiles() or GetDirectories() are on folders with a mix of permissions.
Here's a full-featured, .NET 2.0-compatible implementation.
You can even alter the yielded List of files to skip over directories in the FileSystemInfo version!
(Beware null values!)
public static IEnumerable<KeyValuePair<string, string[]>> GetFileSystemInfosRecursive(string dir, bool depth_first)
{
foreach (var item in GetFileSystemObjectsRecursive(new DirectoryInfo(dir), depth_first))
{
string[] result;
var children = item.Value;
if (children != null)
{
result = new string[children.Count];
for (int i = 0; i < result.Length; i++)
{ result[i] = children[i].Name; }
}
else { result = null; }
string fullname;
try { fullname = item.Key.FullName; }
catch (IOException) { fullname = null; }
catch (UnauthorizedAccessException) { fullname = null; }
yield return new KeyValuePair<string, string[]>(fullname, result);
}
}
public static IEnumerable<KeyValuePair<DirectoryInfo, List<FileSystemInfo>>> GetFileSystemInfosRecursive(DirectoryInfo dir, bool depth_first)
{
var stack = depth_first ? new Stack<DirectoryInfo>() : null;
var queue = depth_first ? null : new Queue<DirectoryInfo>();
if (depth_first) { stack.Push(dir); }
else { queue.Enqueue(dir); }
for (var list = new List<FileSystemInfo>(); (depth_first ? stack.Count : queue.Count) > 0; list.Clear())
{
dir = depth_first ? stack.Pop() : queue.Dequeue();
FileSystemInfo[] children;
try { children = dir.GetFileSystemInfos(); }
catch (UnauthorizedAccessException) { children = null; }
catch (IOException) { children = null; }
if (children != null) { list.AddRange(children); }
yield return new KeyValuePair<DirectoryInfo, List<FileSystemInfo>>(dir, children != null ? list : null);
if (depth_first) { list.Reverse(); }
foreach (var child in list)
{
var asdir = child as DirectoryInfo;
if (asdir != null)
{
if (depth_first) { stack.Push(asdir); }
else { queue.Enqueue(asdir); }
}
}
}
}
This should answer the question. I've ignored the issue of going through subdirectories, I'm assuming you have that figured out.
Of course, you don't need to have a seperate method for this, but you might find it a useful place to also verify the path is valid, and deal with the other exceptions that you could encounter when calling GetFiles().
Hope this helps.
private string[] GetFiles(string path)
{
string[] files = null;
try
{
files = Directory.GetFiles(path);
}
catch (UnauthorizedAccessException)
{
// might be nice to log this, or something ...
}
return files;
}
private void Processor(string path, bool recursive)
{
// leaving the recursive directory navigation out.
string[] files = this.GetFiles(path);
if (null != files)
{
foreach (string file in files)
{
this.Process(file);
}
}
else
{
// again, might want to do something when you can't access the path?
}
}
I prefer using c# framework functions, but the function i need will be included in .net framework 5.0, so i have to write it.
// search file in every subdirectory ignoring access errors
static List<string> list_files(string path)
{
List<string> files = new List<string>();
// add the files in the current directory
try
{
string[] entries = Directory.GetFiles(path);
foreach (string entry in entries)
files.Add(System.IO.Path.Combine(path,entry));
}
catch
{
// an exception in directory.getfiles is not recoverable: the directory is not accessible
}
// follow the subdirectories
try
{
string[] entries = Directory.GetDirectories(path);
foreach (string entry in entries)
{
string current_path = System.IO.Path.Combine(path, entry);
List<string> files_in_subdir = list_files(current_path);
foreach (string current_file in files_in_subdir)
files.Add(current_file);
}
}
catch
{
// an exception in directory.getdirectories is not recoverable: the directory is not accessible
}
return files;
}
Here what am trying to do:
I have a remote server (e.g:svr01,svr02,svr03). Using GetFileList to read the directory get all the files and match with the file name I have then copy to my local drive.
If any files matched then am adding them to an XML file also.
I was trying to do like below
class Program
{
static void Main(string[] args)
{
var getfiles = new fileshare.Program();
string realname = "*main*";
string Location = "SVR01";
bool anymatch = false;
foreach (var file in getfiles.GetFileList(realname,Location))
{anymatch=true;}
if (anymatch == true)
{ baseMeta(); }
foreach (var file in getfiles.GetFileList(realname,Location))
{getfiles.copytolocal(file.FullName); }
}
private FileInfo[] GetFileList(string pattern,string Location)
{
try
{
switch (Location)
{
case "SVR01":
{
var di = new DirectoryInfo(#"\\SVR01\Dev");
return di.GetFiles(pattern);
}
case "SVR02":
{
var di = new DirectoryInfo(#"\\SVR02\Dev");
return di.GetFiles(pattern);
}
case "SVR03":
{
var di = new DirectoryInfo(#"\\SVR03\Prod");
return di.GetFiles(pattern);
}
default: throw new ArgumentOutOfRangeException();
}
}
catch(Exception ex)
{ Console.Write(ex.ToString());
return null;
}
}
private void copytolocal(string filename)
{
string nameonly = Path.GetFileName(filename);
File.Copy(filename,Path.Combine(#"c:\",nameonly),true);
}
private void baseMeta()
{
XmlWriter xmlWrite = XmlWriter.Create(#"c:\basexml");
xmlWrite.WriteStartElement("job");
xmlWrite.WriteElementString("Name", "test");
xmlWrite.WriteElementString("time", DateTime);
xmlWrite.Close();
}
}
but this piece of code worries me because am doing the same process two times, any one please guide me how to avoid this.
foreach (var file in getfiles.GetFileList(realname,Location))
{
anymatch=true;}
if (anymatch == true)
{
baseMeta();
}
foreach (var file in getfiles.GetFileList(realname,Location))
{
getfiles.copytolocal(file.FullName);
}
}
Even am trying to find out if it match anyfile then i quit the first foreach loop generate the basemeta() then goes to next foreach loop to do the rest of the process.
Using LINQ you should be able to easily change your posted code into:
var getfiles = new fileshare.Program();
string realname = "*main*";
string Location = "SVR01";
var fileList = getFiles.GetFileList(realname, Location);
var anymatch = fileList.Any();
if (anymatch) // Or possibly `if (fileList.Any())` if anymatch isn't
// really used anywhere else
baseMeta();
foreach (var file in getfiles.GetFileList(realname,Location))
getfiles.copytolocal(file.FullName);
You'll get the greatest benefit by replacing your GetFileList method with:
private IEnumerable<FileInfo> GetFileList(string pattern,string Location)
{
string directory = string.Empty;
switch (Location)
{
case "SVR01":
directory = #"\\SVR01\Dev";
break;
case "SVR02":
directory = #"\\SVR02\Dev";
break;
case "SVR03":
directory = #"\\SVR03\Prod");
break;
default:
throw new ArgumentOutOfRangeException();
}
DirectoryInfo di = null;
try
{
di = new DirectoryInfo(directory);
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
yield break;
}
foreach(var fi in di.EnumerateFiles(pattern))
yield return fi;
}
Use this
var files = getfiles.GetFileList(realname, Location);
if (files.Length > 0)
{
baseMeta();
foreach(var file in files)
{
getfiles.copytolocal(file.FullName);
}
}
Try this:
Create method to check the file existence and do all in single loop.
your statement is not much clear that when you will copy or not.. use
your condition on which you want to copy or create xml entry..
What is your AnyMatch?? If you want to check that Is there any file then use
var fileList = getfiles.GetFileList(realname,Location);
if( fileList.Count() > 0)
{
baseMeta();
}
foreach (var file in fileList)
{
// copy the file if match does not exist..
getfiles.copytolocal(file.FullName);
}
But Foreach loop through collection if it have any item. so you need not to care about the count of the files..
If you want to do entry on every copy as per your code then why you need to check anyMatch etc. It will create entry on every file copy.
foreach (var file in getfiles.GetFileList(realname,Location))
{
baseMeta();
// copy the file
getfiles.copytolocal(file.FullName);
}