/////////////////////////////////////////////////////////////////////////////// // Description: Gets the target part of a relationship with the 'Internal' target mode. /////////////////////////////////////////////////////////////////////////////// private static void GetRelationshipTargetPart(IOpcPartSet partSet, // Set of the parts in the package. IOpcRelationship relationship, // Relationship that targets the required part. string expectedContentType, // Content type expected for the target part. out IOpcPart targetPart // Recieves pointer to target part. Method may return a valid // pointer even on failure, and the caller must always release if a non-default value is returned. ) { targetPart = null; OPC_URI_TARGET_MODE targetMode = relationship.GetTargetMode(); if (targetMode != OPC_URI_TARGET_MODE.OPC_URI_TARGET_MODE_INTERNAL) { // The relationship's target is not a part. var relationshipType = relationship.GetRelationshipType(); Console.Error.Write("Invalid music bundle package: relationship with type {0} must have Internal target mode.\n", relationshipType); // Set the return code to an error. throw new InvalidOperationException(); } // Relationship's target is a part; the target mode is 'Internal'. // Get the URI of the relationship source. IOpcUri sourceUri = relationship.GetSourceUri(); // Get the URI of the relationship target. IUri targetUri = relationship.GetTargetUri(); // Resolve the target URI to the part name of the target part. IOpcPartUri targetPartUri = sourceUri.CombinePartUri(targetUri); // Check that a part with the resolved part name exists in the part set. var partExists = partSet.PartExists(targetPartUri); if (!partExists) { // The part does not exist in the part set. Console.Error.Write("Invalid music bundle package: the target part of relationship does not exist.\n"); // Set the return code to an error. throw new InvalidOperationException(); } // Get the part. targetPart = partSet.GetPart(targetPartUri); // Get the content type of the part. var contentType = targetPart.GetContentType(); if (contentType != expectedContentType) { // Content type of the part did not match the expected content type. Console.Error.Write("Invalid music bundle package: the target part does not have correct content type.\n"); // Set the return code to an error. throw new InvalidOperationException(); } }
/////////////////////////////////////////////////////////////////////////////// // Description: Opens a stream to the path and file name specified, and deserializes the file's content as the content of the part. /////////////////////////////////////////////////////////////////////////////// private static void WriteFileContentToPart(IOpcFactory opcFactory, string filePath, // Directory where the file is located. string fileName, // Name of file whose content will be deserialized. IOpcPart opcPart // Part into which the file content is deserialized. ) { // Get the full file name of the file. GetFullFileName(filePath, fileName, out var fullFileName); // Create a read-only stream over the file. opcFactory.CreateStreamOnFile(fullFileName, OPC_STREAM_IO_MODE.OPC_STREAM_IO_READ, default,