IoError

Error enum · namespace System · Since 0.05

error IoError

The errors of file and folder operations (File, Directory, FileStream).

A function returns IoError<T>: the result, or one of these codes. A switch can handle each code:

switch (File.ReadAllText(path))
{
    case string text: Console.WriteLine(text); break;
    case IoError.CannotOpen: Console.WriteLine("no such file"); break;
    case error e: Console.WriteLine(e.Message); break;
}

A typed result converts to a plain Error<T> (the code becomes an int).

Values

Value	Number	Description
CannotOpen	1	The file does not exist or cannot be read.
CannotWrite	2	Writing or closing failed (the disk is full, …).
CannotDelete	3	The file or folder cannot be deleted.
AlreadyExists	4	The target exists already (e.g. File.Copy without overwriting).
InvalidText	5	The content is not valid in the requested encoding (File.ReadAllText with an Encoding).
CannotCreate	6	The file cannot be created or truncated (a missing folder, no permission).
CannotMove	7	Moving or renaming failed (File.Move, Directory.Move), e.g. to another drive on AmigaOS or without permission.