XmlReader & XElement 遍历大文件xml，不使用内存。测试可以读取6G的xml

[TestMethod]

       public void TestMethod1()

        {

           //try

           //{

           //string result = new BoDowJonesWatchlistAutoUpdate().StartCheck();

           var xmlFile = "C:\\D\\ ShareFolder\\PFA2_201703102200_D.xml";

 

           //var xeList = ReadPFA.ReadXElements(xmlFile, "SanctionsReferencesList");

 

            using (XmlReader reader = XmlReader.Create(xmlFile))

            {

               //var list = ReadPFA.Load(reader);

 

                reader.MoveToContent();

               while (!reader.EOF)

                {

                   while (reader.Read())

                    {

                       if (reader.NodeType == XmlNodeType.Element && reader.Name == "SanctionsReferencesList")

                        {

                           //string content = reader.ReadInnerXml();

 

                            //string formated = string.Format("<SanctionsReferencesList>{0}</SanctionsReferencesList>", content);

 

 

                           //XElement xEl = XElement.Parse(formated);

                           //XElement xEl = XElement.Load(reader);

                            XElement xEl = XElement.ReadFrom(reader) as XElement;

 

                           //IEnumerable<XElement> querys = from el in xEl.Elements("ReferenceName").Elements()

                           //                               select el;

 

                           var t1 = xEl.HasAttributes;

                           var t2 = xEl.HasElements;

                           var t3 = xEl.Elements();

 

                            IEnumerable<XElement> querys = from el in xEl.Elements()

                                                          select el;

 

                           var sanctionsReferencesList = GetSanctionsReferencesList(querys);

 

                            GetDistinctList(sanctionsReferencesList);

 

                        }

                    }

                }

            }

           //}

           //catch

           //{

           //    throw;

           //}

        }