How to get only filenames within a directory using c#? - c#

When I use the line of code as below , I get an string array containing the entire path of the individual files .
private string[] pdfFiles = Directory.GetFiles("C:\\Documents", "*.pdf");
I would like to know if there is a way to only retrieve the file names in the strings rather than the entire paths.


You can use Path.GetFileName to get the filename from the full path
private string[] pdfFiles = Directory.GetFiles("C:\\Documents", "*.pdf")
.Select(Path.GetFileName)
.ToArray();
EDIT: the solution above uses LINQ, so it requires .NET 3.5 at least. Here's a solution that works on earlier versions:
private string[] pdfFiles = GetFileNames("C:\\Documents", "*.pdf");
private static string[] GetFileNames(string path, string filter)
{
string[] files = Directory.GetFiles(path, filter);
for(int i = 0; i < files.Length; i++)
files[i] = Path.GetFileName(files[i]);
return files;
}


You can use the method Path.GetFileName(yourFileName); (MSDN) to just get the name of the file.


You could use the DirectoryInfo and FileInfo classes.
//GetFiles on DirectoryInfo returns a FileInfo object.
var pdfFiles = new DirectoryInfo("C:\\Documents").GetFiles("*.pdf");
//FileInfo has a Name property that only contains the filename part.
var firstPdfFilename = pdfFiles[0].Name;


string[] fileEntries = Directory.GetFiles(directoryPath);
foreach (var file_name in fileEntries){
string fileName = file_name.Substring(directoryPath.Length + 1);
Console.WriteLine(fileName);
}


There are so many ways :)
1st Way:
string[] folders = Directory.GetDirectories(path, "*", SearchOption.TopDirectoryOnly);
string jsonString = JsonConvert.SerializeObject(folders);
2nd Way:
string[] folders = new DirectoryInfo(yourPath).GetDirectories().Select(d => d.Name).ToArray();
3rd Way:
string[] folders =
new DirectoryInfo(yourPath).GetDirectories().Select(delegate(DirectoryInfo di)
{
return di.Name;
}).ToArray();


You can simply use linq
Directory.EnumerateFiles(LoanFolder).Select(file => Path.GetFileName(file));
Note: EnumeratesFiles is more efficient compared to Directory.GetFiles as you can start enumerating the collection of names before the whole collection is returned.


using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace GetNameOfFiles
{
public class Program
{
static void Main(string[] args)
{
string[] fileArray = Directory.GetFiles(#"YOUR PATH");
for (int i = 0; i < fileArray.Length; i++)
{
Console.WriteLine(fileArray[i]);
}
Console.ReadLine();
}
}
}

Related

Cannot show the content properly in looping

I have write a c# code to retrieve all the file names follow by printing one of the information inside. Example File contains (file1.mht, file2.mht, file3.mht). Maybe the contain inside is (aaaaaa, bbbbbb, cccccc) follow the sequence of the file.
Example out output:
file1.mht aaaaaa
file2.mht bbbbbb
file3.mht cccccc
But I encounter the problem it cannot loop the file name follow by showing the content inside. Anyone can helps? Current result is it show all the directory first and only done the work for the first one in directory.
using HtmlAgilityPack;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Configuration;
using System.Collections.Specialized;
namespace ConsoleApp3
{
class Program
{
static void Main(string[] args)
{
DirectoryInfo mht_file = new DirectoryInfo(#"C:\Users\liewm\Desktop\SampleTest\");
FileInfo[] Files = mht_file.GetFiles("*.mht");
string str = "";
string mht_text = "";
string directory = "";
string listInfo = "";
foreach (FileInfo file in Files)
{
str = file.Name;
directory = mht_file + str;
Console.WriteLine(directory);
}
foreach (char filePath in directory)
{
//Here is my work to retrieve the data in the file
Console.WriteLine("Names:" + str + " " + "Component:" + component);
Console.ReadKey();
}
}
}
}

From your question I understand that you want to print the file name followed by the content of the same, if so you can try:
DirectoryInfo mht_file = new DirectoryInfo(#"C:\Users\liewm\Desktop\SampleTest\");
FileInfo[] Files = mht_file.GetFiles("*.mht");
foreach (FileInfo file in Files)
{
// read the content of the file
var content = File.ReadAllText(file.FullName);
// from your question "Example out output: file1.mht aaaaaa"
Console.WriteLine($"{file.Name} {content}");
}

only done the work for the last one in directory.
Yes, that's cause your directory variable is a string string directory = "" which will get overridden by the last value of loop iteration. You rather want to store in a string[] rather if you want to process all of them.
foreach (FileInfo file in Files)
{
str = file.Name;
directory = mht_file + str;
Console.WriteLine(directory);
}

Please try this.
foreach (FileInfo file in Files)
{
str = file.Name;
directory += mht_file + str;
Console.WriteLine(directory);
}

Get file names from a directory

I tried the following using C#:
using System.IO;
string[] FileName = Directory.GetFiles("dir");
for (int i = 0; i < dir.Length; i++)
{
comboBox1.Items.Add(Dirs[i]);
}
But for some reason it only gets 5 files from this folder. Is it possible to get all of the file's names and put them in the combobox?
Thanks in advance.

Problem : You are getting all the FileNames into FileName string array but you are only getting 5 because you are not using FileName string array in your code.
Solution : You need to use FileName String Array instead of dir.
Try This:
string[] FileName = Directory.GetFiles("dir");
for (int i = 0; i < FileName.Length; i++)
{
comboBox1.Items.Add(FileName[i]);
}
OR
string [] FileNames = Directory.GetFiles("dir");
foreach (var filename in FileName)
{
comboBox1.Items.Add(filename);
}

Probably you are looking for this:
string[] FileName = Directory.GetFiles("dir","*",SearchOption.AllDirectories);

foreach(string fileName in Directory.GetFiles("dir", "*", SearchOption.AllDirectories))
{
comboBox1.Items.Add(fileName));
}

C# Searching for files and folders except in certain folders

Is there any way to exclude certain directories from SearchOption using LINQ command like this
string path = "C:\SomeFolder";
var s1 = Directory.GetFiles(path , "*.*", SearchOption.AllDirectories);
var s2 = Directory.GetDirectories(path , "*.*", SearchOption.AllDirectories);
The path consists of Sub1 and Sub2 Folders with certain files in it. I need to exclude them from directory search.
Thanks
This Worked:
string[] exceptions = new string[] { "c:\\SomeFolder\\sub1",
"c:\\SomeFolder\\sub2" };
var s1 = Directory.GetFiles("c:\\x86", "*.*",
SearchOption.AllDirectories).Where(d => exceptions.All(e =>
!d.StartsWith(e)));
This helped with Exceptions

No there isn't as far as I know. But you could use very simple LINQ to do that in a single line.
var s1 = Directory.GetFiles(path , "*.*", SearchOption.AllDirectories).Where(d => !d.StartsWith("<EXCLUDE_DIR_PATH>")).ToArray();
You can easily combine multiple exclude DIRs too.

You can't do exactly what you want with simple LINQ methods. You will need to write a recursive routine instead of using SearchOption.AllDirectories. The reason is that you want to filter directories not files.
You could use the following static method to achieve what you want:
public static IEnumerable<string> GetFiles(
string rootDirectory,
Func<string, bool> directoryFilter,
string filePattern)
{
foreach (string matchedFile in Directory.GetFiles(rootDirectory, filePattern, SearchOption.TopDirectoryOnly))
{
yield return matchedFile;
}
var matchedDirectories = Directory.GetDirectories(rootDirectory, "*.*", SearchOption.TopDirectoryOnly)
.Where(directoryFilter);
foreach (var dir in matchedDirectories)
{
foreach (var file in GetFiles(dir, directoryFilter, filePattern))
{
yield return file;
}
}
}
You would use it like this:
var files = GetFiles("C:\\SearchDirectory", d => !d.Contains("AvoidMe", StringComparison.OrdinalIgnoreCase), "*.*");
Why the added complexity? This method completely avoids looking inside directories you're not interested in. The SearchOption.AllDirectories will, as the name suggests, search within all directories.
If you're not familiar with iterator methods (the yield return syntax), this can be written differently: just ask!
Alternative
This has almost the same effect. However, it still finds files within subdirectories of the directories you want to ignore. Maybe that's OK for you; the code is easier to follow.
public static IEnumerable<string> GetFilesLinq(
string root,
Func<string, bool> directoryFilter,
string filePattern)
{
var directories = Directory.GetDirectories(root, "*.*", SearchOption.AllDirectories)
.Where(directoryFilter);
List<string> results = new List<string>();
foreach (var d in directories)
{
results.AddRange(Directory.GetFiles(d, filePattern, SearchOption.TopDirectoryOnly));
}
return results;
}

try this
var s2 = Directory.GetDirectories(dirPath, "*", SearchOption.AllDirectories)
.Where(directory => !directory.Contains("DirectoryName"));

///used To Load Files And Folder information Present In Dir In dir
private void button1_Click(object sender, EventArgs e)
{
FileInfo[] fileInfoArr;
StringBuilder sbr=new StringBuilder();
StringBuilder sbrfname = new StringBuilder();
string strpathName = #"C:\Users\prasad\Desktop\Dll";
DirectoryInfo dir = new DirectoryInfo(strpathName);
fileInfoArr = dir.GetFiles("*.dll");
//Load Files From RootFolder
foreach (FileInfo f in fileInfoArr)
{
sbrfname.AppendLine(f.FullName);
}
DirectoryInfo[] dirInfos = dir.GetDirectories("*.*");
//Load Files from folder folder
foreach (DirectoryInfo d in dirInfos)
{
fileInfoArr = d.GetFiles("*.dll");
foreach (FileInfo f in fileInfoArr)
{
sbrfname.AppendLine(f.FullName);
}
sbr.AppendLine(d.ToString());
}
richTextBox1.Text = sbr.ToString();
richTextBox2.Text = sbrfname.ToString();
}

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

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