要使用任意编码加载XML文件,我有以下代码：
- Encoding encoding;
- using (var reader = new XmlTextReader(filepath))
- {
- reader.MoveToContent();
- encoding = reader.Encoding;
- }
- var settings = new XmlReaderSettings { NaMetable = new NaMetable() };
- var xmlns = new XmlNamespaceManager(settings.NaMetable);
- var context = new XmlParserContext(null,xmlns,"",XmlSpace.Default,encoding);
- using (var reader = XmlReader.Create(filepath,settings,context))
- {
- return XElement.Load(reader);
- }
这有效,但打开文件两次似乎有点低效.是否有更好的方法来检测编码,以便我可以这样做：
- 1. Open file
- 2. Detect encoding
- 3. Read XML into an XElement
- 4. Close file
好的,我应该早点想到这个. XmlTextReader(它给我们编码)和XmlReader.Create(允许我们指定编码)接受Stream.那么首先打开一个FileStream,然后将它与XmlTextReader和XmlReader一起使用,如下所示：
- using (var txtreader = new FileStream(filepath,FileMode.Open))
- {
- using (var xmlreader = new XmlTextReader(txtreader))
- {
- // Read in the encoding info
- xmlreader.MoveToContent();
- var encoding = xmlreader.Encoding;
- // Rewind to the beginning
- txtreader.Seek(0,SeekOrigin.Begin);
- var settings = new XmlReaderSettings { NaMetable = new NaMetable() };
- var xmlns = new XmlNamespaceManager(settings.NaMetable);
- var context = new XmlParserContext(null,encoding);
- using (var reader = XmlReader.Create(txtreader,context))
- {
- return XElement.Load(reader);
- }
- }
- }
