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I am getting exception File is used by another Process while moving files in C#. I am moving files in a Windows service from a source folder to another folder as configured.

What I have tried:

My code is as below:
C#
Common.MoveFile(FilewithPath, LocalFilePath + FileName)
 public static bool MoveFile(string sourcefile, string destinationfile)
        {
            try
            {

                Common.WriteLogService
                ("File Movement Process Started", "MoveFile()", false);
                if (File.Exists(sourcefile))
                {
                    if (File.Exists(destinationfile)) //delete destination 
                    // file if it already exists to avoid exception 
                    //of file already exists
                    {
                        File.Delete(destinationfile);
                    }
                    File.Move(sourcefile, destinationfile);
                    Common.WriteLogService("File:" + sourcefile + 
                    " Moved to" + destinationfile, "MoveFile()", false);
                }

                Common.WriteLogService("File Movement Process Completed", 
                                       "MoveFile()", false);
            }
            catch (Exception ex)
            {
                Common.WriteLogService("File Movement Process failed 
                     with Exception: " + ex.Message + Environment.NewLine
                     + " with Inner Exception: " + ex.InnerException + 
                     Environment.NewLine + " at Stack Trace: " + 
                     ex.StackTrace, "MoveFile()", true);
                return false;               
            }
            return true;
        }
Posted
Updated 19-Sep-23 10:52am
v2
Comments
Dave Kreskowiak 18-Sep-23 7:50am    
Are you using a FileSystemWatcher to move files written by a different app?

1 solution

You can't "avoid" it: if a file is opened for writing and not closed then the OS applies a lock on the file, and it remains locked until the original code either closes the file or exits and it's process resources are released back to the OS.

At a guess, somewhere in your code you are accessing the file, but not closing it: you need to find out where and deal with it, but we can't help you do that - we have no access to your code!
 
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