Develop Reference

Use Path.GetFileNameWithoutExtension method in C# to get the file name but the display is not complete

This is the simple C# code I wrote :
string file = #"D:\test(2021/02/10).docx";
var fileName = Path.GetFileNameWithoutExtension(file);
Console.WriteLine(fileName);
I thought I would get the string "test(2021/02/10)" , but I got this result "10)".
How can I solve such a problem?

I just wonder why would you want such behavior. On windows slashes are treated as separator between directory and subdirectory (or file).
So, basically you are not able to create such file name.
And since slashes are treated as described, it is very natural that method implementation just checks what's after last slash and extracts just filename.
If you are interested on how the method is implemented take a look at source code

How to getFiles from a directory path that uses wildcards

This question is similar:
Possible to specify directory path with a wildcard?
However in my case I want to obtain all files from every single folder named 'data' that is a first child of all folders in my directory.
Hypothetically what I would need is the following:
string[] files = System.IO.Directory.GetFiles(directory + "\\Share\\*\\data");
*'directory' is simply a string of the directory path
Wildcards are not accepted in both GetFiles and GetDirectories methods and it is my understanding, they must be used as filters as a second parameter (both these methods have that overload). However in the GetFiles case, it is specifically to filter files and not directories, and in the GetDirectories case, it is giving me the same error, as if the filter was only applicable on the lowest level directories (or something of the sort).
I could do this with multiple calls to GetDirectories and GetFiles in
a loop, but I'd rather find a more
elegant solution. (i.e. What I want to avoid:: Get all directories
under my directory\Share, loop through and add get all files for each
\data directory of those, agglomerate all of that into a list of
strings for my file names etc...)
EDIT - SOLUTION:: Actually #Steve Wong pointed me towards the solution I went with (hopefully regexes aren't a big no-no):
Regex reg = new Regex(#"^\\" + directory + #"\\Share\\.*\\data\\.*\.xml$");
List<string> files = System.IO.Directory.GetFiles(connect + "\\Share","*.*",SearchOption.AllDirectories).Where(path => reg.IsMatch(path)).ToList();
Thanks for the help!

You could try this:
string rootDirectory = directory + "\\Share\\";
var files = Directory.GetDirectories(rootDirectory, "*", SearchOption.AllDirectories).Where(
(directoryPath) => StringComparer.OrdinalIgnoreCase.Compare(Path.GetFileName(directoryPath), "Data") == 0).SelectMany(
(directoryPath) => Directory.GetFiles(directoryPath, "*"));
The Where clause will return all folder paths that end with a "Data/data" folder, and then the SelectMany returns all files in those folders.

How to search Top Level Directory and Only One Child Directory

I have a directory structure something this:
parent
file1
file2
childFolder1
childFolder2
.
.
.
specialChildFolder
file3
file4
Basically I want to get a list of all the files in the parent and specialChildFolder. I did find this question C# Searching for files and folders except in certain folders which excludes particular child folders. There is only one child folder in my case that needs to be searched for files, so creating a long list of folders to be excluded seems backwards to me. It seems to me there should be a way to use a combination of Directory.GetFiles and SearchOption.AllDirectories to match the specific child directory, but I haven't been able to figure out the correct way to do that yet.
EDIT:
The current code is:
string someFileLoc = Assembly.GetExecutingAssembly().Location;
string fileLocation = Path.GetDirectoryName(someFileLoc);
string[] files = Directory.GetFiles(fileLocation);
This currently gets the files from the parent folder (which is really bin), but not the child folder.
DISCLAIMER: I only have roughly a month of C# experience so this might be a painfully easy problem.

Well, you can use recursion to test do perform a directory of the CURRENT folder and pass in a "level" parameter (int) which you reduce every time you call against a SUB folder. Only recurse further if the level is > 0. That way you can run it against any arbitary number of sub folders.
Can you provide the code you have so far and we can show you how to do this.

Concatenation when creating a file name

I am trying to check if a file exists in a specific folder on the local machine. The file name is created by concatenation of the first and last names. I am not sure how to pass the file name into the file.exists since the file name changes each time? I am using the following statement to check the folder.
Code:
if(File.Exists(#"C:\TestDocuments\filename.xml"))
{
MessageBox.Show("The File Already Exists");
}

Path.Combine(String, String) concatenate the two strings, with an intervening separator character. I think here you need is string.format may be like
if(File.Exists(string.Format(#"C:\TestDocuments\{0}{1}.xml",firstName,lastName))

Kevin, as #Dai said you will want to use Path.Combine.
Your code afterwards might look something like this:
if(File.Exists(Path.Combine(directoryPath, filePath)))
{
MessageBox.Show("The File Already Exists");
}
This will combine a say "C:\TestDocuments" with "filename.xml" and can be used for other file names too.

You could essentially do something like this:
public static string CheckFileName(string name)
{
if(string.IsNullOrEmpty(name))
throw new ArgumentNullException();
int i = 0;
string file = Path.Combine(ConfigurationManager.AppSettings[#"FolderPath"], name);
while(File.Exist(file))
file = String.Format(file-{0}, i++);
return file;
}
That is an incredibly rough implementation, as it doesn't handle file extensions and or null values. But if the file exist it should auto increment until a file name that is free exist. This will alleviate files being overridden, but it all depends on your goal.
The above Does:
Pulls the path from your app.config, which would allow you to encrypt it.
Auto increments
Validates that the parameter isn't null.
Since it is a method, it is reusable.
The above Doesn't
Handle extensions in the file name.
Remove previous file, there isn't any overwriting.
When dealing with file paths, you often need Path.Combine to avoid any errors in slashes. That is where String.Format can run into issues, unless a separator exist. The Microsoft Developer Network has some great information on this.
You should check System.IO.

c# Search text files for specific string and get file path

Using c# in a Windows Form I need to search a directory "C:\XML\Outbound" for the file that contains an order number 3860457 and return the path to the file that contains the order number so I can then open the file and display the contents to the user in a RickTextBox.
The end user will have the order number but will not know what file contains that order number so that is why I need to search all files till it finds the filecontaining the order number and return the path (e.g. "C:\XML\Outbound\some_file_name_123.txt")
I am somewhat new to c# so I am not even sure where to start with this. Any direction for this?
Sorry the order number is inside the file so I need to search each file contents for the order number and once the file containing the order number is found return the path to that file. Order number is not part of the file name.

Straight answer:
public string GetFileName(string search){
List<string> paths = Directory.GetFiles(#"C:\XML\Outbond","*.txt",SearchOption.AllDirectories).ToList();
string path = paths.FirstOrDefault(p=>File.ReadAllLines(p).Any(line=>line.IndexOf(search)>=0));
return path;
}
Not-so straight answer:
Even though the above function will give you the path for given string (some handling of errors and edge cases may be nice) it will be terribly slow, especially if you have lots of files. If that's the case you need to tell us more about your environment because chances are you're doing it wrong (: