In C# check that filename is *possibly* valid (not that it exists) [duplicate]

by

Just do;

System.IO.FileInfo fi = null;
try {
  fi = new System.IO.FileInfo(fileName);
}
catch (ArgumentException) { }
catch (System.IO.PathTooLongException) { }
catch (NotSupportedException) { }
if (ReferenceEquals(fi, null)) {
  // file name is not valid
} else {
  // file name is valid... May check for existence by calling fi.Exists.
}

For creating a FileInfo instance the file does not need to exist.

More Related Contents:

  1. How do I hide information in a file? [closed]
  2. Writing data into CSV file in C#
  3. Regex Email validation
  4. Rename a file in C#
  5. Nested using statements in C#
  6. How to change the timeout on a .NET WebClient object
  7. Save and load MemoryStream to/from a file
  8. Best way to resolve file path too long exception
  9. Better way to check if a Path is a File or a Directory?
  10. Email address validation using ASP.NET MVC data type attributes
  11. How to Validate a DateTime in C#?
  12. Why can’t I use System.IO.File methods in an MVC controller?
  13. How to get files in a relative path in C#
  14. ASP .NET MVC Disable Client Side Validation at Per-Field Level
  15. Validation using Validating event and ErrorProvider – Show Error Summary
  16. Proper validation with MVVM
  17. How to check if System.Net.WebClient.DownloadData is downloading a binary file?
  18. Extracting Windows File Properties (Custom Properties) C#
  19. Open a file with Notepad in C#
  20. What is the difference between File and FileInfo in C#?
  21. Find all files in a folder
  22. Email model validation with DataAnnotations and DataType
  23. How to split a large file into chunks in c#?
  24. Customize automatic response on validation error
  25. .NET 4.5 file read performance sync vs async
  26. C#: How to open Windows Explorer windows with a number of files selected
  27. Encrypt SQLite database in C#
  28. c# open file, path starting with %userprofile%
  29. Using DataAnnotations to compare two model properties
  30. Why does System.IO.File.Exists(string path) return false?

Leave a Comment