[英]Add An XML Declaration To String Of XML
我有一些看起来像的xml数据..
<Root>
<Data>Nack</Data>
<Data>Nelly</Data>
</Root>
我想在此字符串中添加"<?xml version=\\"1.0\\"?>"
。 然后将xml保存为字符串。
我试了几件事......
这会破坏并丢失原始的xml字符串
myOriginalXml="<?xml version=\"1.0\"?>" + myOriginalXml;
这没有做任何事情,只保留原始的xml数据,没有附加声明。
XmlDocument doc = new XmlDocument();
doc.LoadXml(myOriginalXml);
XmlDeclaration declaration = doc.CreateXmlDeclaration("1.0", "UTF-8","no");
StringWriter sw = new StringWriter();
XmlTextWriter tx = new XmlTextWriter(sw);
doc.WriteTo(tx);
string xmlString = sw.ToString();
这似乎也没有任何影响..
XmlDocument doc = new XmlDocument();
doc.LoadXml(myOriginalXml);
XmlDeclaration declaration = doc.CreateXmlDeclaration("1.0", "UTF-8", "no");
MemoryStream xmlStream = new MemoryStream();
doc.Save(xmlStream);
xmlStream.Flush();
xmlStream.Position = 0;
doc.Load(xmlStream);
StringWriter sw = new StringWriter();
XmlTextWriter tx = new XmlTextWriter(sw);
doc.WriteTo(tx);
string xmlString = sw.ToString();
使用xmlwritersettings可以更好地控制保存。 XmlWriter.Create接受该设置(而不是默认的构造函数)
var myOriginalXml = @"<Root>
<Data>Nack</Data>
<Data>Nelly</Data>
</Root>";
var doc = new XmlDocument();
doc.LoadXml(myOriginalXml);
var ms = new MemoryStream();
var tx = XmlWriter.Create(ms,
new XmlWriterSettings {
OmitXmlDeclaration = false,
ConformanceLevel= ConformanceLevel.Document,
Encoding = UTF8Encoding.UTF8 });
doc.Save(tx);
var xmlString = UTF8Encoding.UTF8.GetString(ms.ToArray());
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