WCF Image Service is Locking Files

Question

I'm doing a c# wcf service in which I receive a bunch of images and the service merge them in a multiimage Tiff file. At the end of the service I want to delete the original files but I'm receiving an error that some other process is locking the file.

This is the code that receives the images (as a byte[] list) and write them to disk

public static List<string> SaveByteImagesToFile(List<byte[]> bytesToCopyIntoFiles, string imageReferenceType, string imageReferenceValue)
        {
            _applicationLogger.Debug(MethodBase.GetCurrentMethod().DeclaringType.Name, MethodBase.GetCurrentMethod().Name);

            string imageFinalPath = string.Empty;
            string joinImagesFilePath = string.Empty;

            List<string> imagesFilePath = new List<string>();

            int count = 1;

            try
            {
                if (bytesToCopyIntoFiles.Count == 0)
                {
                    throw new ArgumentNullException("bytesToCopyIntoFiles");
                }
                else
                {
                    joinImagesFilePath = SettingsManager.GetServiceSetting(AppSettingsKeys.CopyImagesToFilePath, "NO_VALID_FILEPATH");

                    if (joinImagesFilePath.IsValidFilePath(out string errorMessage, true, true))
                    {

                        foreach (byte[] image in bytesToCopyIntoFiles)
                        {
                            var imageFileName = imageReferenceType + "_" + imageReferenceValue + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + count.ToString();
                            imageFinalPath = joinImagesFilePath + Path.DirectorySeparatorChar + imageFileName + ".tiff";

                            using (FileStream stream = new FileStream(imageFinalPath, FileMode.Create, FileAccess.ReadWrite))
                            {
                                stream.Write(image, 0, image.Length);
                                stream.Flush();
                            }

                            imagesFilePath.Add(imageFinalPath);
                            count++;
                        }
                    }
                    else
                    {
                        exceptionMessageType = MainRepository.GetExceptionMessage("E171");
                        throw new IOException(exceptionMessageType.ExceptionMessage + " " + errorMessage);
                    }
                }
                return imagesFilePath;
            }
            catch
            {
                throw;
            }
        }

How or what can I use to prevent the service or any process to lock the file. As you can see I'm using the using scope for filestream without any luck.

Any ideas? Thanks

Sometimes virus scanners can cause this issue. Try process monitor to see who /what is accessing the file — Mike, Sep 12 '18 at 19:27
the iis worker is the one locking the file. That is what I'm seeing in process monitor — Ray, Sep 15 '18 at 03:15

score 0 · Accepted Answer · answered Sep 19 '18 at 01:23

0

Resolved! By organizing the files in a certain order, when creating the multipage tiff, by the time the logic ends the worker already unlock the resources and I'm able now to delete them without any issue.

answered Sep 19 '18 at 01:23

Ray

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WCF Image Service is Locking Files

1 Answers1