If private external storage is enabled, reading a multimedia attribut…

…e from the database (stored in DB) created a temporary file in external storage with an invalid _url. This issue occurred because the presigned URL's private segment was not properly considered. (#1092)

dotnet/src/dotnetframework/GxClasses/Domain/GXFileIO.cs

@@ -444,8 +444,8 @@ public GxExternalFileInfo(string objectPath, ExternalProvider provider, GxFileTy
 			string folderName = ((ExternalProviderBase)provider).Folder;
 			if (!string.IsNullOrEmpty(folderName) && fileType.HasFlag(GxFileType.Attribute) && !_name.StartsWith(folderName))
 			{
-				_url = $"{provider.GetBaseURL()}{_name}";
 				_name = $"{folderName}{StorageUtils.DELIMITER}{_name}";
+				_url = provider.GetUrl(_name, fileType, 0);
 			}
 		}
 	}