关于gb2312编码的xml解析

来源：互联网发布：windows安全配置手册编辑：程序博客网时间：2024/05/17 07:58

在ios项目中遇到这样一个问题，需要读取远程的xml文件，进行解析，但是目标xml是gb2312编码的，用System.Text.Encoding.GetEncoding("gb2312")并不奏效。提示“Encoding name 'GB2312' not supported”，查了下才知道GetEncoding只支持下面四个属性：

utf-8UTF8Encoding utf-16UnicodeEncoding (Little-endian)utf-16BEUnicodeEncoding (Big-endian)utf-16LE

后来查了下才知道，ios中不支持gb2312编码，需要另寻他法。最终找到了，文件下载：http://pan.baidu.com/s/1mgDgb48

下载解压出来是2个文件，放入你的程序中，demo代码如下：

private void DownloadXML(string coursenumber) {    var webClient = new WebClient();    webClient.DownloadStringCompleted += (s, e) = >{        var text = e.Result;        text = text.Replace("=\"gb2312\"", "=\"UTF-8\"");        string localFilename = "cc.xml";        string documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);        string localPath = Path.Combine(documentsPath, localFilename);        File.WriteAllText(localPath, text);        InvokeInBackground(() = >{            //XmlDocument doc = new XmlDocument ();            //doc.Load (localPath);            //XElement xe = XElement.Load (localPath);            //var x = xe.Elements ("course").Cast<CourseVido.Course> ();            Console.WriteLine("ok");        });    };    string xmlurl = string.Format("http://......./mobile/{0}/MP4/lessonPAD.xml", coursenumber);    Gb2312Encoding GB2312 = new Gb2312Encoding();    webClient.Encoding = GB2312;    webClient.DownloadStringAsync(new Uri(xmlurl));}

另一处理方式：

//下载文件WebClient client = new WebClient ();                        //Gb2312Encoding gb2312 = new Gb2312Encoding ();//client.Encoding = gb2312;client.DownloadFile (xmlurl, localPath);Stream str = client.OpenRead (xmlurl);//StreamReader reader = new StreamReader (str);byte[] mbyte = new byte[str.Length + 1];int allmybyte = mbyte.Length;int startmbyte = 0;while (allmybyte > 0) {int m = str.Read (mbyte, startmbyte, allmybyte);if (m == 0)break;startmbyte += m;allmybyte -= m;}//编码处理Gb2312Encoding gb2312 = new Gb2312Encoding ();string chinesestr = gb2312.GetString (mbyte, 0, mbyte.Length);chinesestr = chinesestr.Replace ("=\"gb2312\"", "=\"UTF-8\"");File.WriteAllText (localPath, chinesestr);str.Close ();//读取xml对象XmlSerializer serializer = new XmlSerializer (typeof(CourseVido.course));using (TextReader reader = new StreamReader (localPath)) {result = serializer.Deserialize (reader) as CourseVido.course;}return result;

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