JimBalter Unless I've misunderstood, it's not constructive because "infinite number of names composed only of valid characters that are forbidden" is rather meaningless if the rules for filenames are well-defined and themselves not infinite.
Nothing in this answer justified describing the possibilities as infinite in a way that is helpful or useful to the reader. Show 4 more comments. Jonathan Leffler Jonathan Leffler k gold badges silver badges bronze badges. And what about utf8? The files were all single-character file names, one per character that was permitted in a filename. Otherwise, it isn't much different — at the level of detail I'm discussing.
But don't expect this to happen reliably if you are moving to the OSX world, e. That caused some issues, as it created a new directory with the scheme in. Note that if a directory has a colon in its name, you cannot add the directory to a Unix PATH variable because colon is used as the separator semicolon on Windows.
So, programs in such a directory must either be run with a pathname that specifies where it is could be relative or absolute , or you must be in the directory and have dot. Add a comment. And what about my non-english-speaking users, who would all be screwed by this? We use a whitelist approach, but don't forget on Windows you have to manage reserved, case-independent strings, like device names prn, lpt1, con and.
I'm working on a project now involving media files in 20 languages, and the filenames need to reflect the title of the media item because end users will be finding the content that way. Many of the names use punctuation. Any restriction on filename characters carries a price, so in this case we have to minimize restrictions. In this use case, the range of characters that don't make sense in a filename is far shorter and simpler than those that do.
A reality for many programs these days is that you don't know who the customers will be, or what languages they will use. For example if you're publishing to the general public in an app store or Windows or Apple store.
You could make your software English-only or European-only by default, which is a common approach It can also be an avoidable loss of revenue for the developer. It doesn't take that much more effort to design programs to be largely script-agnostic. I'd say that any good code will say what it means. You're not disallowing impossible values, you're disallowing values that you're too afraid to test. Show 11 more comments.
BSMP 4, 8 8 gold badges 33 33 silver badges 43 43 bronze badges. I remember that it used to be like that. I just tried it in Windows 10 and that message box is not showing up anymore, but a sound is being played instead. I took the freedom to add a screenshot. Unfortunately, your link was dead. I updated it to an archive link , but it only works mediocre. Leonardo Herrera Leonardo Herrera 8, 4 4 gold badges 37 37 silver badges 62 62 bronze badges. Discussing different possible approaches Difficulties with defining, what's legal and not were already adressed and whitelists were suggested.
Wikipedia states , that for example the modifier letter colon [ See 7. Possible choices and research notes To keep things organized, I will always give the character, it's name and the hexadecimal number representation. With this knowledge, you have several options to produce these special characters including the use of code points to unicode converter or again the Unicode Lookup to reversely, convert the numerical representation into the unicode character - set the code point base below to decimal or hexadecimal respectively a one-liner makro in Autohotkey : :?
Be aware, that many programs do not fully support this windows feature for all of unicode as of time writing. M icro s oft Office is an exception where it usually works, some other OSes provide similar functionality. Cadoiz Cadoiz 12 12 silver badges 21 21 bronze badges. I've made a program to apply these changes at github. Let me know if there's any characters or patterns I've missed! Wojciech Sciesinski Wojciech Sciesinski 1 1 silver badge 4 4 bronze badges.
Kartik Soneji Kartik Soneji 1 1 gold badge 11 11 silver badges 21 21 bronze badges. Bret Cameron Bret Cameron 1 1 gold badge 3 3 silver badges 16 16 bronze badges.
Possible duplicate to stackoverflow. IgnoreCase ; if match. Append match. Append containsFolder? EndsWith " " built. EndsWith ". Substring 0, built. Groups["bad"]; if group. Append built. Substring index, match. Append group. Value ; builder. Charlie Rix Charlie Rix 51 1 1 bronze badge. I have three questions: 1. Why did you initialise StringBuilder with initial capacity value? Why did you add 12 to the length of the filename?
Was 12 chosen arbitrarily or was there some thought behind this number? Sorry for the delay, I just noticed this question 1 Initializing stringbuilder with a length is a bit of a micro optimization.
I don't remember exactly, but it starts with a small buffer and doubles each time the buffer size is exceeded. CodeMouse92 6, 12 12 gold badges 70 70 silver badges bronze badges. Dogg Bookins Dogg Bookins 49 1 1 bronze badge. IO provides the following functions for invalid file system characters: Path. GetInvalidPathChars Those functions should return appropriate results depending on the platform the.
That said, the Remarks in the documentation pages for those functions say: The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names. Duplicate of stackoverflow. Wally Brockway Wally Brockway 11 1 1 bronze badge. I took the freedom to improve your formatting for better readability. I also explained the same base idea above and now incorporated some of your suggestions, if that's okay.
Thank you! David Spector 1, 11 11 silver badges 20 20 bronze badges. Malayalam Character Map. Displays the characters of the text font you select. Character Map is a free program with extensive compatibility with all types of. Dec 03, Character Map 2. Character Map displays all of the characters for a selected font. Features: - Pastes any character into your current document.
Special characters can be translated into their HTML-equivalents. Uncrippled Shareware no nag-screens. Character Map is a very simple freeware Windows app designed to show all characters of a specific font package, while also providing a few other tools to quickly copy and paste some items. You may find the interface a bit annoying because it cannot be resized, but Character Map does show all characters of an installed font, giving you the power to instantly copy and paste any of them in an opened text document.
Obviously, the main window lets you select the font package you wish to verify, but also the font size, with two simple options to include font information and enable HTML translation. Do not assume case sensitivity. For more information, see CreateFile. Volume designators drive letters are similarly case-insensitive. Use any character in the current code page for a name, including Unicode characters and characters in the extended character set — , except for the following:.
Characters whose integer representations are in the range from 1 through 31, except for alternate data streams where these characters are allowed. For more information about file streams, see File Streams. Use a period as a directory component in a path to represent the current directory, for example ". For more information, see Paths. Use two consecutive periods..
Also avoid these names followed immediately by an extension; for example, NUL. For more information, see Namespaces. Do not end a file or directory name with a space or a period. Although the underlying file system may support such names, the Windows shell and user interface does not.
However, it is acceptable to specify a period as the first character of a name. For example, ". When you create a long file name, Windows may also create a short 8.
This 8. Not all file systems follow the tilde substitution convention, and systems can be configured to disable 8. Therefore, do not make the assumption that the 8. To request 8. This is true even if a long file name contains extended characters, regardless of the code page that is active during a disk read or write operation.
Files using long file names can be copied between NTFS file system partitions and Windows FAT file system partitions without losing any file name information. In this case, the short file name is substituted if possible. The path to a specified file consists of one or more components , separated by a special character a backslash , with each component usually being a directory name or file name, but with some notable exceptions discussed below. It is often critical to the system's interpretation of a path what the beginning, or prefix , of the path looks like.
This prefix determines the namespace the path is using, and additionally what special characters are used in which position within the path, including the last character. Each component of a path will also be constrained by the maximum length specified for a particular file system. In general, these rules fall into two categories: short and long.
Note that directory names are stored by the file system as a special type of file, but naming rules for files also apply to directory names. To summarize, a path is simply the string representation of the hierarchy between all of the directories that exist for a particular file or directory name. For Windows API functions that manipulate files, file names can often be relative to the current directory, while some APIs require a fully qualified path.
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