C# check correct file name

Exists filePath ; if filePath. WriteLine "Please keep the filepath under chars so that you still are able to provide a name for the file. Make sure you enter a valid filename. CultureInvariant ; if fileName. I especially don't like: if filePath. Improve this question. Poplop Poplop 1 1 gold badge 1 1 silver badge 4 4 bronze badges. Add a comment. Active Oldest Votes. Improve this answer.

Guillaume Beauvois Guillaume Beauvois 3 3 silver badges 7 7 bronze badges. Mahesh Chand Updated date Jun 04, The Extension property of the FileInfo class returns the extension of a file. Here is a complete code example. C file extension FileInfo class FileInfo.

Extension get extension in. Next Recommended Reading. Net Core 6. Create A. But if I set that property ValidateNames on true, and so C wil check for valid file names, how can I check a priori if my file name is valid.

In order to replace it with a valid default file name. In C there must be a simple method for that I guess Some help woud be nice I do not know of any particular feature that does that. You would have to write your own function to test your filename.

This discussion thread is closed Start new discussion. Similar topics PHP. File Name case check. Is there a consensus on how to check a polymorphic instance? Any way to check a url. Specified argument was out of the range of valid values. Last Updated : 04 Apr, While developing an application that can be desktop or web in C , such kind of requirement to extract the filename from a given path where the path can be taken while selecting a file using File Open dialog box or any other sources can arise.

A path may contain the drive name, directory name s and the filename. This method is used to get the file name and extension of the specified path string. The returned value is null if the file path is null. Syntax: public static string GetFileName string path ; Here, path is the string from which we have to obtain the file name and extension. Return Value: This method will return the characters after the last directory separator character in path.

If the last character of the path is a directory or volume separator character, this method returns Empty. If the path is null, this method returns null.