简单问题：如何在xml的声明部分加入encoding内容

[lbl20020123]

xml的声明部分一般由三部分构成，version，encoding和standalone。我现在有一个xml文件，我要根据他的内容生成另外一个xml文件。
新文件的声明部分只有version，请问：如何在程序中加入encoding内容？？

[孟子E章]

你用用File FileInfo写入文件

str = "<?xml version='1.0' encoding='gb2312'?>" + xmlDom.OuterXml;
StreamWrite w = new .....
w.Write(str)

[saucer]

the above suggetion is a hack, you should let the writer to output the right encoding, for example, try something like


using System;
using System.Xml;

class TestWriteXml
{
static void Main()
{
XmlDocument doc = new XmlDocument();
doc.LoadXml("<root><child>1</child><child>2</child></root>");

XmlTextWriter xtw = new XmlTextWriter("myfile.xml",System.Text.Encoding.GetEncoding("GB2312"));
xtw.Formatting = Formatting.Indented;
xtw.WriteStartDocument();
doc.Save(xtw);
//the following is also fine
//xtw.WriteNode(new XmlNodeReader(doc.DocumentElement), true);
xtw.WriteEndDocument();
xtw.Close();
}
}