Develop Reference

GEt only filename instead of whole path

I am making project on getting all text files from a selected drive. The thing is I am getting names of all text files along with path but all I need is name. I don't want to even get the extension, all I want is name of that text file. I have searched all over the internet but couldn't find the right answer. I am storing all those names in a listbox. here is my code:
String[] dir1 = System.IO.Directory.GetDirectories(#"F:\");
for (int i = 0; i < dir1.Length; i++)
{
FileAttributes attributes = File.GetAttributes(dir1[i]);
if ((attributes & FileAttributes.Hidden) != fileAttributes.Hidden)
{
string folder = #""+ dir1[i];
txtfiles = Directory.GetFiles(folder, "*.txt");
listBox1.Items.AddRange(txtfiles);
}
}
How can I get only names, instead of whole path and extension?

The Path.GetFileNameWithoutExtension method will do this for you.
https://msdn.microsoft.com/en-us/library/system.io.path.getfilenamewithoutextension(v=vs.110).aspx
Returns the file name of the specified path string without the extension.
Pass the results of GetFiles into the method and it should return what you need.

Take a look at System.IO.Path.GetFileNameWithoutExtension()
You could do something like
txtfiles = Directory.GetFiles(folder, "*.txt");
var fileNames = txtfiles.Select(System.IO.Path.GetFileNameWithoutExtension).ToList();

You need to use Path.GetFileName method which will just extract the file name only from the path back, so what you can do is project the txtfiles to get the collection of just filename like:
listBox1.Items.AddRange(txtfiles.Select(file=>Path.GetFileName(file));
and if you only need path, not actually reading them, you can use EnumerateFiles method which would be better in memory performance which would be :
listBox1.Items.AddRange(txtDirectory.EnumerateFiles(folder, "*.txt")
.Select(file=>Path.GetFileName(file))
);
Also if you only need name of file without extension then you can do as Valuator answer suggested.

Trying to delete multiple files from a single directory whose names match\contain a particular string

I wish to delete image files. The files are named somefile.jpg and somefile_t.jpg, the file with the _t on the end is the thumbnail. With this delete operation I wish to delete both the thumbnail and original image.
The code works up until the foreach loop, where the GetFiles method returns nothing.
The string.Substring operation successfully returns just the file name with no extension and no _t e.g: somefile.
There are no invalid characters in the file names I wish to delete.
Code looks good to me, only thing I can think of is that I am somehow not using the searchpattern
function properly.
filesource = "~/somedir/somefile_t.jpg"
var dir = Server.MapPath(filesource);
FileInfo FileToDelete = new FileInfo(dir);
if (FileToDelete.Exists)
{
var FileName = Path.GetFileNameWithoutExtension(FileToDelete.Name);
foreach(FileInfo file in FileToDelete.Directory.GetFiles(FileName.Substring(0, FileName.Length - 2), SearchOption.TopDirectoryOnly).ToList())
{
file.Delete();
}
}

DirectoryInfo.GetFiles Method (String, SearchOption)
You need to ensure that the first parameter, searchPattern, is proper. In you're case you are supplying FileName.Substring(0, FileName.Length - 2), which would be "somefile". The reason the method returns nothing is because you are looking for files literally named somefile. What you meant to do was to use a wildcard in addition to the base filename: String.Concat(FileName.Substring(0, FileName.Length - 2), "*"), which would be "somefile*" ... at least I think you're looking for that searchPattern as opposed to any other one.

This code works for me:
var file_path = #"K:\Work\IoCToy\IoCToy\image.jpg";
var dir = Path.GetDirectoryName(file_path);
var fileNameWithoutExtension = Path.GetFileNameWithoutExtension(file_path);
var files = Directory.EnumerateFiles(dir, string.Format("{0}*", fileNameWithoutExtension), SearchOption.TopDirectoryOnly);
Of course, you have to delete the files by the returned file names. I am assuming here that your folder contains only the image and the thumbnail file which start with the "image" substring.

How to get folder/directory path from input?

How do you get the last folder/directory out of user-input regardless of if the input is a path to a folder or a file? This is when the folder/file in question may not exist.
C:\Users\Public\Desktop\workspace\page0320.xml
C:\Users\Public\Desktop\workspace
I'm trying to get out the folder "workspace" out of both examples, even if the folder "workspace" or file "page0320.xml" doesn't exist.
EDIT: Using BrokenGlass's suggestion, I got it to work.
String path = #"C:\Users\Public\Desktop\workspace";
String path2 = #"C:\Users\Public\Desktop\workspace\";
String path3 = #"C:\Users\Public\Desktop\workspace\page0320.xml";
String fileName = path.Split(new char[] { '\\' }).Last<String>().Split(new char[] { '/' }).Last<String>();
if (fileName.Contains(".") == false)
{
path += #"\";
}
path = Path.GetDirectoryName(path);
You can substitute any of the path variables and the output will be:
C:\Users\Public\Desktop\workspace
Of course, this is working under the assuption that files have extensions. Fortunately, that assumption works for my purposes.
Thanks all. Been a long-time lurker and first-time poster. It was really impressive how fast and helpful the responses were :D

use Path.GetDirectoryName :
string path = Path.GetDirectoryName(#"C:\Users\Public\Desktop\workspace\page0320.xml");
string path2 = Path.GetDirectoryName(#"C:\Users\Public\Desktop\workspace\");
Note the trailing backslash in the path though in the second example - otherwise workspace will be interpreted as file name.

I will use DirectoryInfo in this way:
DirectoryInfo dif = new DirectoryInfo(path);
if(dif.Exist == true)
// Now we have a true directory because DirectoryInfo can't be fooled by
// existing file names.
else
// Now we have a file or directory that doesn't exist.
// But what we do with this info? The user input could be anything
// and we cannot assume that is a file or a directory.
// (page0320.xml could be also the name of a directory)

You can use GetFileName after GetDiretoryName from the Path class in the System.IO namespace.
GetDiretoryName will get the path without the filename (C:\Users\Public\Desktop\workspace).
GetFileName then returns the last part of the path as if it is a extensionless file (workspace).
Path.GetFileName(Path.GetDirectoryName(path));
EDIT: the path must have a trailing path separator to make this example work.

If you can make some assumptions then its pretty easy..
Assumption 1: All files will have an extension
Assumption 2: The containing directory will never have an extension
If Not String.IsNullOrEmpty(Path.GetExtension(thePath))
Return Path.GetDirectoryName(thePath)
Else
Return Path.GetFileName(thePath)
End If

Like said before, there's not really a feasible solution but this might also do the trick:
private string GetLastFolder(string path)
{
//split the path into pieces by the \ character
var parts = path.Split(new[] { Path.DirectorySeparatorChar, });
//if the last part has an extension (is a file) return the one before the last
if(Path.HasExtension(path))
return parts[parts.Length - 2];
//if the path has a trailing \ return the one before the last
if(parts.Last() == "")
return parts[parts.Length - 2];
//if none of the above apply, return the last element
return parts.Last();
}
This might not be the cleanest solution but it will work. Hope this helps!

Recursively looping through a drive and replacing illegal characters

I have to create an app that drills into a specific drive, reads all file names and replaces illegal SharePoint characters with underscores.
The illegal characters I am referring to are: ~ # % & * {} / \ | : <> ? - ""
Can someone provide either a link to code or code itself on how to do this? I am VERY new to C# and need all the help i can possibly get. I have researched code on recursively drilling through a drive but i am not sure how to put the character replace and the recursive looping together. Please help!

The advice for removing illegal characters is here:
How to remove illegal characters from path and filenames?
You just have to change the character set to your set of characters that you want to remove.
If you have figured out how to recurse the folders, you can get all of the files in each folder with:
var files = System.IO.Directory.EnumerateFiles(currentPath);
and then
foreach (string file in files)
{
System.IO.File.Move(file, ConvertFileName(file));
}
The ConvertFileName method you will write to accept a filename as a string, and return a filename stripped of the bad characters.
Note that, if you are using .NET 3.5, GetFiles() works too. According to MSDN:
The EnumerateFiles and GetFiles
methods differ as follows: When you
use EnumerateFiles, you can start
enumerating the collection of names
before the whole collection is
returned; when you use GetFiles, you
must wait for the whole array of names
to be returned before you can access
the array. Therefore, when you are
working with many files and
directories, EnumerateFiles can be
more efficient.
How to recursively list directories
string path = #"c:\dev";
string searchPattern = "*.*";
string[] dirNameArray = Directory.GetDirectories(path, searchPattern, SearchOption.AllDirectories);
// Or, for better performance:
// (but breaks if you don't have access to a sub directory; see 2nd link below)
IEnumerable<string> dirNameEnumeration = Directory.EnumerateDirectories(path, searchPattern, SearchOption.AllDirectories);
How to: Enumerate Directories and Files
How to recursively list all the files in a directory in C#?

Not really an answer, but consider both of the following:
The following characters are not valid in filenames anyways so you don't have to worry about them: /\:*?"<>|.
Make sure your algorithm handles duplicate names appropriately. For example, My~Project.doc and My#Project.doc would both be renamed to My_Project.doc.

A recursive method to rename files in folders is what you want. Just pass it the root folder and it will call itself for all subfolders found.
private void SharePointSanitize(string _folder)
{
// Process files in the directory
string [] files = Directory.GetFiles(_folder);
foreach(string fileName in files)
{
File.Move(fileName, SharePointRename(fileName));
}
string[] folders = Directory.GetDirectories(_folder);
foreach(string folderName in folders)
{
SharePointSanitize(folderName);
}
}
private string SharePointRename(string _name)
{
string newName = _name;
newName = newName.Replace('~', '');
newName = newName.Replace('#', '');
newName = newName.Replace('%', '');
newName = newName.Replace('&', '');
newName = newName.Replace('*', '');
newName = newName.Replace('{', '');
newName = newName.Replace('}', '');
// .. and so on
return newName;
}
Notes:
You can replace the '' in the SharePointRename() method to whatever character you want to replace with, such as an underscore.
This does not check if two files have similar names like thing~ and thing%

class Program
{
private static Regex _pattern = new Regex("[~#%&*{}/\\|:<>?\"-]+");
static void Main(string[] args)
{
DirectoryInfo di = new DirectoryInfo("C:\\");
RecursivelyRenameFilesIn(di);
}
public static void RecursivelyRenameFilesIn(DirectoryInfo root)
{
foreach (FileInfo fi in root.GetFiles())
if (_pattern.IsMatch(fi.Name))
fi.MoveTo(string.Format("{0}\\{1}", fi.Directory.FullName, Regex.Replace(fi.Name, _pattern.ToString(), "_")));
foreach (DirectoryInfo di in root.GetDirectories())
RecursivelyRenameFilesIn(di);
}
}
Though this will not handle duplicates names as Steven pointed out.

File extension - c#

I have a directory that contains jpg,tif,pdf,doc and xls. The client DB conly contains the file names without extension. My app has to pick up the file and upload the file. One of the properties of the upload object is the file extension.
Is there a way of getting file extension if all i have is the path and name
eg:
C:\temp\somepicture.jpg is the file and the information i have through db is
c:\temp\somepicture

Use Directory.GetFiles(fileName + ".*"). If it returns just one file, then you find the file you need. If it returns more than one, you have to choose which to upload.

Something like this maybe:
DirectoryInfo D = new DirectoryInfo(path);
foreach (FileInfo fi in D.GetFiles())
{
if (Path.GetFileNameWithoutExtension(fi.FullName) == whatever)
// do something
}

You could obtain a list of all of the files with that name, regardless of extension:
public string[] GetFileExtensions(string path)
{
System.IO.DirectoryInfo directory =
new System.IO.DirectoryInfo(System.IO.Path.GetDirectoryName(path));
return directory.GetFiles(
System.IO.Path.GetFileNameWithoutExtension(path) + ".*")
.Select(f => f.Extension).ToArray();
}

Obviously, if you have no other information and there are 2 files with the same name and different extensions, you can't do anything (e.g. there is somepicture.jpg and somepicture.png at the same time).
On the other hand, usually that won't be the case so you can simply use a search pattern (e.g. somepicture.*) to find the one and only (if you're lucky) file.

Search for files named somepicture.* in that folder, and upload any that matches ?

Get the lowest level folder for each path. For your example, you would have:
'c:\temp\'
Then find any files that start with your filename in that folder, in this case:
'somepicture'
Finally, grab the extension off the matching filename. If you have duplicates, you would have to handle that in a unique way.

You would have to use System.IO.Directory.GetFiles() and iterate through all the filenames. You will run into issues when you have a collision like somefile.jpg and somefile.tif.
Sounds like you have bigger issues than just this and you may want to make an argument to store the file extension in your database as well to remove the ambiguity.

you could do something like this perhaps....
DirectoryInfo di = new DirectoryInfo("c:/temp/");
FileInfo[] rgFiles = di.GetFiles("somepicture.*");
foreach (FileInfo fi in rgFiles)
{
if(fi.Name.Contains("."))
{
string name = fi.Name.Split('.')[0].ToString();
string ext = fi.Name.Split('.')[1].ToString();
System.Console.WriteLine("Extension is: " + ext);
}
}

One more, with the assumption of no files with same name but different extension.
string[] files = Directory.GetFiles(#"c:\temp", #"testasdadsadsas.*");
if (files.Length >= 1)
{
string fullFilenameAndPath = files[0];
Console.WriteLine(fullFilenameAndPath);
}

From the crippled file path you can get the directory path and the file name:
string path = Path.GetDirectoryName(filename);
string name = Path.GetFileName(filename);
Then you can get all files that matches the file name with any extension:
FileInfo[] found = new DirectoryInfo(path).GetFiles(name + ".*");
If the array contains one item, you have your match. If there is more than one item, you have to decide which one to use, or what to do with them.

All the pieces are here in the existing answers, but just trying to unify them into one answer for you - given the "guaranteed unique" declaration you're working with, you can toss in a FirstOrDefault since you don't need to worry about choosing among multiple potential matches.
static void Main(string[] args)
{
var match = FindMatch(args[0]);
Console.WriteLine("Best match for {0} is {1}", args[0], match ?? "[None found]");
}
private static string FindMatch(string pathAndFilename)
{
return FindMatch(Path.GetDirectoryName(pathAndFilename), Path.GetFileNameWithoutExtension(pathAndFilename));
}
private static string FindMatch(string path, string filename)
{
return Directory.GetFiles(path, filename + ".*").FirstOrDefault();
}
Output:
> ConsoleApplication10 c:\temp\bogus
Best match for c:\temp\bogus is [None found]
> ConsoleApplication10 c:\temp\7z465
Best match for c:\temp\7z465 is c:\temp\7z465.msi
> ConsoleApplication10 c:\temp\boot
Best match for c:\temp\boot is c:\temp\boot.wim