System.IO.Packaging.Package.GetRelationships C# (CSharp) Méthode

        public PackageRelationshipCollection GetRelationships()
        {
            // Ensure the Relationships dict is instantiated first.
            ICollection<PackageRelationship> rels = Relationships.Values;
            relationshipsCollection.Relationships.Clear();
            relationshipsCollection.Relationships.AddRange(rels);
            return relationshipsCollection;
        }

        public static int ExtractFiles(string packagefile, string destFolder)
        {
            //extract the package content to temp folder
            string tempfolder = Path.Combine(destFolder,
                                             Path.GetFileNameWithoutExtension(packagefile));

            // Path.GetFileNameWithoutExtension(fileFullPath)
            if (Directory.Exists(tempfolder))
            {
                Directory.Delete(tempfolder, true);
                //Wait till folder is deleted
                Thread.Sleep(1000);
            }
            Directory.CreateDirectory(tempfolder);
            try
            {
                using (System.IO.Packaging.Package ABpackage = System.IO.Packaging.Package.Open(@packagefile, FileMode.Open, FileAccess.Read, FileShare.Read))
                {
                    PackageRelationshipCollection relationships = ABpackage.GetRelationships();
                    PackagePartCollection         parts         = ABpackage.GetParts();
                    List <ZipEntry> files = GetPackageFile(packagefile);
                    if (files.Count() - 1 != parts.Count()) //[Content_Types].xml is not considered as file part
                    {
                        if (files.Count() - 1 > parts.Count())
                        {
                            Console.WriteLine(String.Format("Package {0} is corrupt. Additional files found", packagefile));
                            return(-1);
                        }
                        else if (files.Count() - 1 < parts.Count())
                        {
                            Console.WriteLine(String.Format("Package {0} is corrupt. Some files are missing", packagefile));
                            return(-1);
                        }
                    }

                    List <PackagePart> originalParts = new List <PackagePart>();

                    foreach (PackagePart item in parts)
                    {
                        if ((item.ContentType == "application/vnd.openxmlformats-package.relationships+xml") ||
                            (item.ContentType == "application/vnd.openxmlformats-package.digital-signature-origin") ||
                            (item.ContentType == "application/vnd.openxmlformats-package.digital-signature-xmlsignature+xml"))
                        {
                        }
                        else
                        {
                            originalParts.Add(item);
                        }
                    }
                    //if (originalParts.Count != relationships.Count() - 1)
                    //{
                    //    if (originalParts.Count > relationships.Count() - 1)
                    //    {
                    //   //     ErrorBase.WriteToLog(String.Format("Package {0} is corrupt. Additional files found", packagefile));
                    //        return -1;
                    //    }
                    //    else if (originalParts.Count > relationships.Count() - 1)
                    //    {
                    //        //ErrorBase.WriteToLog(String.Format("Package {0} is corrupt. Some files are missing", packagefile));
                    //        return -1;
                    //    }
                    //}

                    foreach (PackageRelationship rel in relationships)
                    {
                        PackagePart packagePart = ABpackage.GetPart(rel.TargetUri);
                        if (!packagePart.ContentType.Contains("part/"))
                        {
                            continue;
                        }

                        string   lastModified = String.Empty;
                        ZipEntry entry        = files.Find(e => e.Name.Equals(packagePart.Uri.ToString().TrimStart('/'), StringComparison.InvariantCultureIgnoreCase));
                        if (entry == null)
                        {
                            continue;
                        }

                        //prepare file path information
                        string partRelativePath = Uri.UnescapeDataString(packagePart.Uri.ToString());

                        //partRelativePath = (partRelativePath.TrimStart('/')).Replace("%20", " ");
                        //partRelativePath = partRelativePath.Replace("%7b", "{");
                        //partRelativePath = partRelativePath.Replace("%7d", "}");
                        //partRelativePath = partRelativePath.Replace("%7B", "{");
                        //partRelativePath = partRelativePath.Replace("%7D", "}");
                        //partRelativePath = partRelativePath.Replace("%C2%A0", " ");
                        //partRelativePath = partRelativePath.Replace("%C3%84", "Ä");
                        //partRelativePath = partRelativePath.Replace("%C3%A4", "ä");
                        //partRelativePath = partRelativePath.Replace("%C3%96", "Ö");
                        //partRelativePath = partRelativePath.Replace("%C3%B6", "ö");
                        //partRelativePath = partRelativePath.Replace("%C3%9C", "Ü");
                        //partRelativePath = partRelativePath.Replace("%C3%BC", "ü");
                        //partRelativePath = partRelativePath.Replace("%C3%9F", "ß");
                        //partRelativePath = partRelativePath.Replace("/", "\\");
                        string absolutePath = Path.Combine(tempfolder, partRelativePath.TrimStart('/'));
                        if (!Directory.Exists(Path.GetDirectoryName(absolutePath)))
                        {
                            Directory.CreateDirectory(Path.GetDirectoryName(absolutePath));
                        }

                        FileInfo extractFileInfo = new FileInfo(absolutePath);
                        //Hp --> Logic: Check if the zip entry is older than the file system version
                        //if yes don't overwrite the file system version.
                        if ((extractFileInfo.Exists) &&
                            (DateTime.Compare(extractFileInfo.LastWriteTime, entry.DateTime) >= 0))
                        {
                            continue;
                        }
                        // Create the file with the Part content
                        using (FileStream fileStream = new FileStream(absolutePath, FileMode.Create))
                        {
                            //ErrorBase.WriteToLog("Extracting file: " + absolutePath);
                            try
                            {
                                packagePart.GetStream().CopyTo(fileStream);
                            }
                            catch (Exception ex)
                            {
                                //ErrorBase.WriteToLog(ex.Message);
                                return(1);
                            }
                        }

                        extractFileInfo.Refresh();
                        //Hp --> Always remove ReadOnly file attribute
                        extractFileInfo.Attributes &= ~FileAttributes.ReadOnly;
                        //set creation and modification date to zipped file date
                        extractFileInfo.CreationTime  = entry.DateTime;
                        extractFileInfo.LastWriteTime = entry.DateTime;
                    }
                }
                return(1);
            }
            catch (Exception ex)
            {
                //ErrorBase.WriteToLog(packagefile + "extraction encountered an exception." + ex.Message);
                //ErrorBase.WriteToLog("Cleanup extracted files / folders...");
                if (Directory.Exists(tempfolder))
                {
                    Directory.Delete(tempfolder, true);
                    //Wait till folder is deleted
                    Thread.Sleep(1000);
                }
                return(-1);
            }
        }