DataSet转成XML的编码问题？

Question

我的代码如下                
                stream = new MemoryStream();
                //从stream装载到XmlTextReader
                writer = new XmlTextWriter(stream, Encoding.Unicode);                //用WriteXml方法写入文件.
                xmlDS.WriteXml(writer);
                int count = (int)stream.Length;
                byte[] arr = new byte[count];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(arr, 0, count);                //返回Unicode编码的文本
                UnicodeEncoding utf = new UnicodeEncoding();
                StreamWriter sw = new StreamWriter(xmlFile);
                //sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
                sw.WriteLine(utf.GetString(arr).Trim());
                sw.Close();
问题出现在用上面的方法把dataset转成XML文件后，当我再把XML转回Dataset后发现里面的字符类型数据不能正常排序，在网上找了找原因说可能是utf-8编码的问题于是我把sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");这句话注释了，但是注释后发现问题还是有，还是不能正常排序，所以想请各位大侠帮帮忙，指点一下。

Answer 1

试试这样呢dataSet.WriteXml("c:/a.txt");

Answer 2

不是有个方法吗 WriteXml（）

Answer 3

都是高手...
麻烦来个人帮我把我昨天发的帖子顶下,问题已经自己解决了,但是没任回复.总不能无满意结贴吧,来者有分.谢谢!
http://topic.csdn.net/u/20090312/09/20c77597-eeba-43cf-a87c-73c0bf1c0b6c.html?762718896

Answer 4

StringBuilder sb = new StringBuilder();
ds.WriteXml(new System.IO.StringWriter(sb), XmlWriteMode.DiffGram);

Answer 5

..ds.WriteXml(文件名) 即可，你用字节流有可能会解析不正常的

Answer 6

这是我们再用的一个xml转化方法        public static void ConvertDataSetToXMLFile(DataSet xmlDS, string xmlFile)
        {
            MemoryStream stream = null;
            XmlTextWriter writer = null;            try
            {
                stream = new MemoryStream();
                //从stream装载到XmlTextReader
                writer = new XmlTextWriter(stream, Encoding.Unicode);
                //用WriteXml方法写入文件.
                xmlDS.WriteXml(writer);
                int count = (int)stream.Length;
                byte[] arr = new byte[count];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(arr, 0, count);                //返回Unicode编码的文本
                UnicodeEncoding utf = new UnicodeEncoding();
                StreamWriter sw = new StreamWriter(xmlFile);
                sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
                sw.WriteLine(utf.GetString(arr).Trim());
                sw.Close();
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (writer != null)
                    writer.Close();
                if (stream != null)
                    stream.Close();
            }            
        }  

Answer 7

没看出来哪有dataset啊
#region write/read dataset using xml file
        public static void WriteXML(string descDirectory, string fileName, DataSet ds)
        {
            if (!Directory.Exists(descDirectory))
            {
                Directory.CreateDirectory(descDirectory);
            }
            ds.WriteXml(descDirectory + @"\" + fileName + ".xml");
            ds.WriteXmlSchema(descDirectory + @"\" + fileName + ".xsd");
        }        public static DataSet ReadXML(string descDirectory, string fileName)
        {
            XmlDataDocument document = new XmlDataDocument();
            document.DataSet.ReadXml(descDirectory + @"\" + fileName + ".xml");
            return document.DataSet;        }
        #endregion