The method replace file in C This method replace file uses the contents of a specified file with the file described by the current FileInfo object, deletes the original file, and creates a backup of the replaced file. It also specifies whether to ignore merge errors in C. Destinationbackupilename string The name of a file with which to create a backup of the file described by the destfilename parameter.
Ignoremetadataerrors boolean This method is true to ignore merge errors such as attributes and ACLs from the replaced file to the replacement file; otherwise false. Returns FileInfo A fileinfo object that encapsulates information about the file described by the destfilename parameter. Attributes comvisibleattribute Exceptions argumentexception The path described by the destfilename parameter was not of a legal form -or- the path described by the destBackupFileName parameter was not of a legal form.
Argumentnullexception The destfilename parameter is null. Filenotfoundexception The file described by the current FileInfo object could not be found -or- the file described by the destinationfilename parameter could not be found. Platformnotsupportedexception The current operating system is not Microsoft windows NT or later. Examples The following example uses the replace method to replaces a file with another file and create a backup of the replaced file in c.
It is a tested. NET framework method. The file class in the system. IO namespace provides this convenient method. It performs a fast rename of the file you target. It sometimes throws exceptions. Using move method in a file in C The move. The move method deletes the original file. The method that renames files is called file. You must include the System.
IO namespace at the top with a using directive or specify the fully qualified name "System. Important: This method works across disk volumes, and it does not throw an exception if the source and destination are the same file. Note that if you attempt to replace a file by moving a file of the same name into that directory, an IOException is thrown. Creates or overwrites a file in the specified path, specifying a buffer size and options that describe how to create or overwrite the file.
Creates or overwrites a file in the specified path, specifying a buffer size, options that describe how to create or overwrite the file, and a value that determines the access control and audit security for the file. NET Framework and. NET Core versions older than 2.
You can query for invalid characters by using the GetInvalidPathChars method. The following example creates a file in the specified path, writes some information to the file, and reads from the file. The FileStream object created by this method has a default FileShare value of None ; no other process or code can access the created file until the original file handle is closed. This method is equivalent to the Create String, Int32 method overload using the default buffer size of 4, bytes.
The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see GetCurrentDirectory.
If the specified file does not exist, it is created; if it does exist and it is not read-only, the contents are overwritten. ReadWrite Thanks in advance. Improve this question.
Jeremy Thompson 55k 26 26 gold badges silver badges bronze badges. Frustrated Guy Frustrated Guy 1 1 gold badge 7 7 silver badges 10 10 bronze badges. Add a comment. Active Oldest Votes. There are a fair few other posts on this topic. Detecting whether a file is locked by another process or indeed the same process How to check for file lock?
The solution appears to be: Try 'Code to read file if its not locked by another app Catch as System. IOException Also just an FYI that your log file is unmanaged resource so deterministic finalization will help with this resource contention issue.
ReadWrite, FileShare. ReadWrite fs. SetLength 0 file. Save fs fs. Flush End Using. Improve this answer. Community Bot 1 1 1 silver badge. Jeremy Thompson Jeremy Thompson 55k 26 26 gold badges silver badges bronze badges. I have a scheduled process that writes to a log file. If someone logs into the server and leaves file explorer up, with that log file selected, the scheduled process gets this exception and either fails to run, or can't write to its log file.
So annoying. File explorer should open the file, display the preview, and close it; but no, it holds the file open as long as the file is selected.
I can't kill file explorer from the scheduled process, doing that creates a bad problem. Android Eve Android Eve The program that is logging only actually writes data every minutes, I'm trying to clear the data from the log in between those writes, it's only complicated by the fact that the program doing the logging doesn't release it's lock on the text file in between writes.
I'm okay with the concept that if I clear it in the middle of writing I would end up with weird data. Do you have control over the other program? If you can modify it in any way and guarantee synchronization between the two programs, make it Close the file after each write.
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