c# - 使用指定为“utf-16”的编码解析 xml 时出现 XmlException

Question

我在解析具有 utf-16 编码的 XML 时遇到问题，但它与 utf-8 完美配合。
任何人都可以帮助我解决这个问题吗？

我收到以下错误：

System.Web.HttpUnhandledException' was thrown.
System.Xml.XmlException: There is no Unicode byte order mark.
Cannot switch to Unicode

XML 标头：

<?xml version="1.0" encoding="utf-16"?>
<RiskAssessmentRequestValue xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

C# 代码隐藏：

    rptTransformedXml.DataSource = parser.ExtractData(xml);
    rptTransformedXml.DataBind();


    public List<XmlDataExtract> ExtractData(string xml)
    {
        MemoryStream stream = new MemoryStream(Encoding.ASCII.GetBytes(xml));
        return ExtractData(stream);
    }


    public List<XmlDataExtract> ExtractData(Stream xmlStream)
    {
        XmlReaderSettings settings = new XmlReaderSettings
                                         {
                                             IgnoreComments = true,
                                             IgnoreWhitespace = true,
                                             CloseInput = true
                                         };

        XmlReader reader = XmlReader.Create(xmlStream, settings);
        XmlPathBuilder pathBuilder = new XmlPathBuilder(reader);
        List<XmlDataExtract> xmlDataList = new List<XmlDataExtract>();

        while (reader.Read())
        {
            if (reader.NodeType == XmlNodeType.XmlDeclaration)
                continue;
            pathBuilder.Add();
            CollectAttributeData(reader, xmlDataList, pathBuilder);
            CollectElementData(reader, xmlDataList, pathBuilder);
        }
        return xmlDataList;
    }

Answer 1

您可以根据 xml 内容的编码创建编码器：

string encoding = "UTF-8"; // should match encoding in XML
string xml = @"<?xml version='1.0' encoding='UTF-8'?><table><row>1</row></table>";

var ms = new MemoryStream(Encoding.GetEncoding(encoding).GetBytes(xml));

var xdrs = new XmlReaderSettings()
    {IgnoreComments = true,
    IgnoreWhitespace = true,
    CloseInput = true};

var xdr = XmlReader.Create(ms, xdrs);
while (xdr.Read())
 {
    Console.Write("qqq");
 }

有关编码的更多信息，有一个相关的问题