Question

我有以下代码：

    MemoryStream ms = new MemoryStream();
    XmlWriter w = XmlWriter.Create(ms);

    w.WriteStartDocument(true);
    w.WriteStartElement("data");

    w.WriteElementString("child", "myvalue");

    w.WriteEndElement();//data
    w.Close();
    ms.Close();

    string test = UTF8Encoding.UTF8.GetString(ms.ToArray());

正确生成XML;但是，我的问题是字符串'test'的第一个字符是ï（char＃239），使得它对某些xml解析器无效：这是来自哪里？我究竟做错了什么？

我知道我可以通过在第一个角色之后开始解决问题，但我宁愿知道它为什么存在而不仅仅是修补问题。

谢谢！

Answer 1

在这里找到一个解决方案： http://www.timvw.be/generating-utf-8-with-systemxmlxmlwriter/

我在顶部错过了这个：

XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.Encoding = new UTF8Encoding(false);
MemoryStream ms = new MemoryStream();
XmlWriter w = XmlWriter.Create(ms, xmlWriterSettings);

感谢大家的帮助！

Answer 2

问题是当您使用UTF-8将其转换为字符串时，编写器生成的XML是UTF-16。试试这个：

StringBuilder sb = new StringBuilder();
using (StringWriter writer = new StringWriter(sb))
using (XmlWriter w = XmlWriter.Create(writer))
{
    w.WriteStartDocument(true);
    w.WriteStartElement("data");

    w.WriteElementString("child", "myvalue");

    w.WriteEndElement();//data
}

string test = sb.ToString();

Answer 3

你可以改变这样的编码：

w.Settings.Encoding = Encoding.UTF8;

Answer 4

如果您关心编辑使用的字节顺序标记（例如Visual Studio正确检测UTF8编码的XML和语法高亮显示），则所有这些都略有偏差。

这是一个解决方案：

MemoryStream stream = new MemoryStream();

XmlWriterSettings settings = new XmlWriterSettings();
settings.Encoding = Encoding.UTF8;
settings.Indent = true;
settings.IndentChars = "\t";

using (XmlWriter writer = XmlWriter.Create(stream, settings))
{
    // ... write

    // Make sure you flush or you only get half the text
    writer.Flush();

    // Use a StreamReader to get the byte order correct
    StreamReader reader = new StreamReader(stream,Encoding.UTF8,true);
    stream.Seek(0, SeekOrigin.Begin);
    result = reader.ReadToEnd();
}

我已经完整地获得了2个片段here

XmlWriter编码问题

5 个答案: