System.IO.Packaging.PackagePart.CreateRelationship C# (CSharp) Méthode

        public PackageRelationship CreateRelationship(Uri targetUri, TargetMode targetMode, string relationshipType)
        {
            return CreateRelationship(targetUri, targetMode, relationshipType, null);
        }

        /// <summary>
        /// Creates a package-level or part-level relationship and its target part
        /// (if the target part wasn't already created before). If the sourceTargetFilePath does not exist,
        /// then both relationship and part will not be created.
        /// </summary>
        /// <param name="package"></param>
        /// <param name="sourcePart">Set to null for a package-level relationship</param>
        /// <param name="sourceTargetFilePath"></param>
        /// <param name="targetUri"></param>
        /// <param name="targetMimeType"></param>
        /// <param name="relationshipTypeUri"></param>
        /// <param name="targetPart">The target part that was created</param>
        /// <returns>True if relationship and part (if not already created before) was created,
        /// False if source file does not exist and thus relationship and part wasn't created.</returns>
        private static bool CreateRelationshipAndTargetPart(
            System.IO.Packaging.Package package, System.IO.Packaging.PackagePart sourcePart,
            string sourceTargetFilePath, string targetUri, string targetMimeType, string relationshipTypeUri,
            out System.IO.Packaging.PackagePart targetPart)
        {
            // TODO add console output for added parts and relationships

            targetPart = null;

            if (!File.Exists(sourceTargetFilePath))
            {
                Console.WriteLine(
                    "Warning: The following source file does not exist: " + sourceTargetFilePath +
                    ". Part and relationship will not be created.");
                return(false);
            }
            try
            {
                targetPart = package.CreatePart(
                    PackUriHelper.CreatePartUri(
                        new Uri(targetUri, UriKind.Relative)), targetMimeType, CompressionOption.Maximum);
                using (FileStream fileStream = new FileStream(sourceTargetFilePath, FileMode.Open, FileAccess.Read))
                {
                    fileStream.CopyTo(targetPart.GetStream());
                }
            }
            catch (InvalidOperationException)
            {
                Console.WriteLine(
                    "Warning: The following part URI already exists and will not be created again: " +
                    targetUri + ". Relationship will still be created.");
            }
            if (sourcePart == null)
            {
                package.CreateRelationship(
                    PackUriHelper.CreatePartUri(
                        new Uri(targetUri, UriKind.Relative)), TargetMode.Internal, relationshipTypeUri);
            }
            else
            {
                sourcePart.CreateRelationship(
                    PackUriHelper.CreatePartUri(
                        new Uri(targetUri, UriKind.Relative)), TargetMode.Internal, relationshipTypeUri);
            }
            return(true);
        }