We Keep Coding

Get files from a folder that I have created in Xamarin.Android

I want get all files from an external storage folder(wall_e_imgs)..Here are codes-
public void getImages()
{
var path1 = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath.ToString();
string path = System.IO.Path.Combine(path1, "wall_e_imgs");
//var files= System.IO.Directory.GetFiles(Android.OS.Environment.ExternalStorageDirectory.ToString() + "wall_e_imgs");
//var files = System.IO.Directory.GetFiles(path);
//string path = Android.OS.Environment.ExternalStorageDirectory.ToString() + "/wall_e_imgs";
//File directory=new File(path);
Java.IO.File directory = new Java.IO.File(path);
Java.IO.File[] files = directory.ListFiles();//always count is 0 even though there are lot files there
foreach (var i in files)
{
FileInfo info = new FileInfo(i.Name);
if (info.Name.Contains("Wall_e"))
{
di.Add(new DownloadedImages { Path1 = info.DirectoryName, Name1 = info.FullName });
}
}
}
But it always give 0 files even though there are lot of files.

Try this
var folder = Android.OS.Environment.ExternalStorageDirectory + Java.IO.File.Separator + "yourfoldername";
if (!Directory.Exists(folder))
Directory.CreateDirectory(folder);
var filesList = Directory.GetFiles(folder);
foreach (var file in filesList)
{
var filename = Path.GetFileName(file);
}

Try something like this:
// Use whatever folder path you want here, the special folder is just an example
string folderPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "wall_e_imgs");
if (Directory.Exists(folderPath))
{
var files = Directory.EnumerateFiles(folderPath);
foreach (var file in files)
{
// Do your stuff
}
}
Please note that this uses the Directory class from System.IO, not Java.IO

ffilelist will contain a list of mp3 files in "/storage/emulated/0/Music/"
string phyle;
string ffilelist = "";
public void listfiles()
{
try
{
var path1 = "/storage/emulated/0/Music/";
var mp3Files = Directory.EnumerateFiles(path1, "*.mp3", SearchOption.AllDirectories);
foreach (string currentFile in mp3Files)
{
phyle = currentFile;
ffilelist = ffilelist + "\n" + phyle;
}
//playpath(phyle); // play the last file found
}
catch (Exception e9)
{
Toast.MakeText(ApplicationContext, "ut oh\n"+e9.Message , ToastLength.Long).Show();
}
}

how to sort file in alphanumeric in Fileinfo[] obtained via directory.getfiles and store them in same fileinfo[] array using C#

I need to take all file in particular directory and store them in fileinfo array and sort them alphanumerically.
code snippet
string dir = #"C:\tem";
DirectoryInfo directory = new DirectoryInfo(dir);
if (directory != null)
{
FileInfo[] files = directory.GetFiles("*.bmp");
if (files.Length > 0)
{
Console.WriteLine("Files:");
foreach (FileInfo subFile in files)
{
Console.WriteLine(" " + subFile.Name + " (" + subFile.Length + " bytes)");
}
}
}`
currently i am getting output
test_1.bmp test_11.bmp test_2.bmp
but i want the output like
test_1.bmp,test_2.bmp,test_11.bmp
Thanks

You can use LINQ for that:
if (directory != null)
{
FileInfo[] files = directory.GetFiles("*.bmp");
files.Select(f => f.Name).ToList().
OrderBy(x=> Int32.Parse(x.Substring(x.IndexOf('_') + 1, x.IndexOf('.') - x.IndexOf('_') - 1))).
ToList().ForEach(s => Console.WriteLine(s));
}
The output is:
test_1.bmp
test_2.bmp
test_11.bmp
UPDATE:
// Store as FileInfo array
FileInfo[] sortedFiles = files.OrderBy(x => Int32.Parse(x.Name.Substring(x.Name.IndexOf('_') + 1, x.Name.IndexOf('.') - x.Name.IndexOf('_') - 1))).
ToArray();
// Do whatever you want
foreach (FileInfo item in sortedFiles)
{
Console.WriteLine(string.Format("FullPath -> {0}", item.FullName));
}

public static void Main()
{
string dir = #"C:\tem";
var directory = new DirectoryInfo(dir);
FileInfo[] files = directory.GetFiles("*.bmp");
var sortedFiles=files.ToDictionary(k=>GetIntValueFromString(k.Name),v=>v).OrderBy(entry=>entry.Key);
foreach (var file in sortedFiles)
{
Console.WriteLine(file.Value.Name);
}
Console.Read();
}
static int GetIntValueFromString(string input)
{
var result = 0;
var intString = Regex.Replace(input, "[^0-9]+", string.Empty);
Int32.TryParse(intString, out result);
return result;
}

Error while handling multiple txt files

I'm constructing a program to search all .xml inside a folder setted by user (Source folder) and copy all these files to another folder (Destination folder).
My program is able to search all XML within all sub folders from (Source folder), the result returns around 5000 files that are placed on a list, this list is worked later by a function, but he can only work with 31 files, then appears "not responding "and the debugger shows that the program is staying a long time in the execution.
Here is my code:
Button action:
private void btnCopiarSalvar_Click(object sender, EventArgs e)
{
foreach (string name in listFileNames)
{
if (readXML(name ))
{
tbArquivo.Text = name ; //Feedback textbox, tell the current filename
}
}
pbStatus.Increment(50);
cbFinal.Checked = true; //Feedback checkBox, to tell user that the task is over.
}
Function ReadXML
public bool readXML(string name)
{
//foreach (string nome in listaArquivos)
//{ //I tried to the foreach inside, but nothing Works.
try
{
string text = null;
string readBuffer = File.ReadAllText(name);
text = readBuffer.Aggregate(text, (current, b) => current + b);
var encoding = new ASCIIEncoding();
Byte[] textobytes = encoding.GetBytes(text);
if (!File.Exists(destino))
{
string destinoComNomeArquivo = destino + "\\" + Path.GetFileName(nome);
using (FileStream fs = File.Create(destinoComNomeArquivo))
{
foreach (byte textobyte in textobytes)
{
fs.WriteByte(textobyte);
pbProcess.PerformStep();
}
Console.WriteLine("Arquivo gravado " + Path.GetFileName(nome));
}
}
pbProcess.PerformStep();
}
catch (Exception e)
{
Console.WriteLine(e);
}
//}
return true;
}
Error: ContextSwitchDeadlock was detected.
Tried Solution: Disable Managed Debug Assistants.
After disabling the MDA, the programs still only read-copy 31 files (of 5k).

The first thing i recommand is ... don't do that kind of file copy! use the File.Copy function instead.
Try to use this code snipping from MSDN:
void DoCopy(string path)
{
var copytask = new Task(() =>
{
string destinoComNomeArquivo = #"C:\" + Path.GetFileName(path);
DirectoryCopy(path, destinoComNomeArquivo, false);
});
copytask.Start();
}
private void DirectoryCopy(string sourceDirName, string destDirName, bool copySubDirs)
{
DirectoryInfo dir = new DirectoryInfo(sourceDirName);
DirectoryInfo[] dirs = dir.GetDirectories();
if (!dir.Exists)
{
throw new DirectoryNotFoundException(
"Source directory does not exist or could not be found: "
+ sourceDirName);
}
if (!Directory.Exists(destDirName))
{
Directory.CreateDirectory(destDirName);
}
FileInfo[] files = dir.GetFiles();
foreach (FileInfo file in files)
{
string temppath = Path.Combine(destDirName, file.Name);
file.CopyTo(temppath, false);
}
var counter = 0;
var maxcounter = files.Count();
while (maxcounter < counter)
{
var item = files.ElementAt(counter).Name;
WriteAsnc(item);
counter++;
}
if (copySubDirs)
{
foreach (DirectoryInfo subdir in dirs)
{
string temppath = Path.Combine(destDirName, subdir.Name);
DirectoryCopy(subdir.FullName, temppath, copySubDirs);
}
}
}
const int _maxwritingprocess = Environment.ProcessorCount;
int _currentwritingtasks;
void WriteAsnc(string filepath)
{
_currentwritingtasks++;
var task = Task.Factory.StartNew(() =>
{
XDocument doc = XDocument.Load(filepath);
doc.Elements().First().Add(new XAttribute("Attribute Name","Attribute Value"));
doc.Save(filepath);
_currentwritingtasks--;
});
if(_currentwritingtasks == _maxwritingprocess)
task.Wait();
_currentwritingtasks--;
}
The next point the ContextSwitchDeadlock is a Threading problem and i thing your pbProcess is the source. What does that Process do i don't see anything of that process and i don't thing it is Impotent for your copy

convert a FileInfo array into a String array C#

I create a FileInfo array like this
try
{
DirectoryInfo Dir = new DirectoryInfo(DirPath);
FileInfo[] FileList = Dir.GetFiles("*.*", SearchOption.AllDirectories);
foreach (FileInfo FI in FileList)
{
Console.WriteLine(FI.FullName);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
And this array holds all the file names in folder = DirPath
I thought of looping through the FileInfo array and copy it to a String array. Is this ok or is there a much cleaner method ?

Using LINQ:
FileList.Select(f => f.FullName).ToArray();
Alternatively, using Directory you can get filenames directly.
string[] fileList = Directory.GetFiles(DirPath, "*.*",
SearchOption.AllDirectories);

If you want to go the other way (convert string array into FileInfo's) you can use the following:
string[] files;
var fileInfos = files.Select(f => new FileInfo(f));
List<FileInfo> infos = fileInfos.ToList<FileInfo>();

the linq is a great soluction, but for the persons who don't want to use linq, i made this function:
static string BlastWriteFile(FileInfo file)
{
string blasfile = " ";
using (StreamReader sr = file.OpenText())
{
string s = " ";
while ((s = sr.ReadLine()) != null)
{
blasfile = blasfile + s + "\n";
Console.WriteLine();
}
}
return blasfile;
}

Try this one
DirectoryInfo directory = new DirectoryInfo("your path");
List<string> Files = (directory.GetFiles().Where(file => file.LastWriteTime >= date_value)).Select(f => f.Name).ToList();
If you don't want a filter with date, you can simply convert with the below code
List<string> logFiles = directory.GetFiles().Select(f => f.Name).ToList();
If you need the full path of the file, you can use FullName instead of Name.

C#:Getting all image files in folder

I am trying to get all images from folder but ,this folder also include sub folders. like /photos/person1/ and /photos/person2/ .I can get photos in folder like
path= System.IO.Directory.GetCurrentDirectory() + "/photo/" + groupNO + "/";
public List<String> GetImagesPath(String folderName)
{
DirectoryInfo Folder;
FileInfo[] Images;
Folder = new DirectoryInfo(folderName);
Images = Folder.GetFiles();
List<String> imagesList = new List<String>();
for (int i = 0; i < Images.Length; i++)
{
imagesList.Add(String.Format(#"{0}/{1}", folderName, Images[i].Name));
// Console.WriteLine(String.Format(#"{0}/{1}", folderName, Images[i].Name));
}
return imagesList;
}
But how can I get all photos in all sub folders? I mean I want to get all photos in /photo/ directory at once.

Have a look at the DirectoryInfo.GetFiles overload that takes a SearchOption argument and pass SearchOption.AllDirectories to get the files including all sub-directories.
Another option is to use Directory.GetFiles which has an overload that takes a SearchOption argument as well:
return Directory.GetFiles(folderName, "*.*", SearchOption.AllDirectories)
.ToList();

I'm using GetFiles wrapped in method like below:
public static String[] GetFilesFrom(String searchFolder, String[] filters, bool isRecursive)
{
List<String> filesFound = new List<String>();
var searchOption = isRecursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
foreach (var filter in filters)
{
filesFound.AddRange(Directory.GetFiles(searchFolder, String.Format("*.{0}", filter), searchOption));
}
return filesFound.ToArray();
}
It's easy to use:
String searchFolder = #"C:\MyFolderWithImages";
var filters = new String[] { "jpg", "jpeg", "png", "gif", "tiff", "bmp", "svg" };
var files = GetFilesFrom(searchFolder, filters, false);

There's a good one-liner solution for this on a similar thread:
get all files recursively then filter file extensions with LINQ
Or if LINQ cannot be used, then use a RegEx to filter file extensions:
var files = Directory.GetFiles("C:\\path", "*.*", SearchOption.AllDirectories);
List<string> imageFiles = new List<string>();
foreach (string filename in files)
{
if (Regex.IsMatch(filename, #"\.jpg$|\.png$|\.gif$"))
imageFiles.Add(filename);
}

I found the solution this Might work
foreach (string img in Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.Desktop),"*.bmp" + "*.jpg" + "SO ON"))

You need the recursive form of GetFiles:
DirectoryInfo.GetFiles(pattern, searchOption);
(specify AllDirectories as the SearchOption)
Here's a link for more information:
MSDN: DirectoryInfo.GetFiles

This allows you to use use the same syntax and functionality as Directory.GetFiles(path, pattern, options); except with an array of patterns instead of just one.
So you can also use it to do tasks like find all files that contain the word "taxes" that you may have used to keep records over the past year (xlsx, xls, odf, csv, tsv, doc, docx, pdf, txt...).
public static class CustomDirectoryTools {
public static string[] GetFiles(string path, string[] patterns = null, SearchOption options = SearchOption.TopDirectoryOnly) {
if(patterns == null || patterns.Length == 0)
return Directory.GetFiles(path, "*", options);
if(patterns.Length == 1)
return Directory.GetFiles(path, patterns[0], options);
return patterns.SelectMany(pattern => Directory.GetFiles(path, pattern, options)).Distinct().ToArray();
}
}
In order to get all image files on your c drive you would implement it like this.
string path = #"C:\";
string[] patterns = new[] {"*.jpg", "*.jpeg", "*.jpe", "*.jif", "*.jfif", "*.jfi", "*.webp", "*.gif", "*.png", "*.apng", "*.bmp", "*.dib", "*.tiff", "*.tif", "*.svg", "*.svgz", "*.ico", "*.xbm"};
string[] images = CustomDirectoryTools.GetFiles(path, patterns, SearchOption.AllDirectories);

You can use GetFiles
GetFiles("*.jpg", SearchOption.AllDirectories)

GetFiles("*.jpg", SearchOption.AllDirectories) has a problem at windows7. If you set the directory to c:\users\user\documents\, then it has an exception: because of windows xp, win7 has links like Music and Pictures in the Documents folder, but theese folders don't really exists, so it creates an exception. Better to use a recursive way with try..catch.

This will get list of all images from folder and sub folders and it also take care for long file name exception in windows.
// To handle long folder names Pri external library is used.
// Source https://github.com/peteraritchie/LongPath
using Directory = Pri.LongPath.Directory;
using DirectoryInfo = Pri.LongPath.DirectoryInfo;
using File = Pri.LongPath.File;
using FileInfo = Pri.LongPath.FileInfo;
using Path = Pri.LongPath.Path;
// Directory and sub directory search function
public void DirectoryTree(DirectoryInfo dr, string searchname)
{
FileInfo[] files = null;
var allFiles = new List<FileInfo>();
try
{
files = dr.GetFiles(searchname);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
if (files != null)
{
try
{
foreach (FileInfo fi in files)
{
allFiles.Add(fi);
string fileName = fi.DirectoryName + "\\" + fi.Name;
string orgFile = fileName;
}
var subDirs = dr.GetDirectories();
foreach (DirectoryInfo di in subDirs)
{
DirectoryTree(di, searchname);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
public List<String> GetImagesPath(String folderName)
{
var dr = new DirectoryInfo(folderName);
string ImagesExtensions = "jpg,jpeg,jpe,jfif,png,gif,bmp,dib,tif,tiff";
string[] imageValues = ImagesExtensions.Split(',');
List<String> imagesList = new List<String>();
foreach (var type in imageValues)
{
if (!string.IsNullOrEmpty(type.Trim()))
{
DirectoryTree(dr, "*." + type.Trim());
// output to list
imagesList.Add = DirectoryTree(dr, "*." + type.Trim());
}
}
return imagesList;
}

var files = new DirectoryInfo(path).GetFiles("File")
.OrderByDescending(f => f.LastWriteTime).First();
This could gives you the perfect result of searching file with its latest mod