如何从XmlTextWriter的使​​用C＃删除BOM？

问题描述

如何从正在创建一个XML文件中删除BOM？

我已使用新的UTF8Encoding（假）方法试过，但它不工作。这里是code我有：

 的XmlDocument xmlDoc中=新的XmlDocument（）;
XmlTextWriter的的XmlWriter =新的XmlTextWriter（文件名，新UTF8Encoding（假））;
xmlWriter.Formatting = Formatting.Indented;
xmlWriter.WriteProcessingInstruction（XML，版本='1.0'编码='UTF-8'）;
xmlWriter.WriteStartElement（项目）;
xmlWriter.Close（）;
xmlDoc.Load（文件名）;
XmlNode的根= xmlDoc.DocumentElement;
XmlElement的项目= xmlDoc.CreateElement（项目）;
root.AppendChild（项目）;
的XmlElement itemCategory = xmlDoc.CreateElement（类）;
XMLTEXT itemCategoryText = xmlDoc.CreateTextNode（测试）;
item.AppendChild（itemCategory）;
itemCategory.AppendChild（itemCategoryText）;
xmlDoc.Save（文件名）;
 

解决方案

您正在保存文件两次 - 以的XmlTextWriter 键和一次xmlDoc.Save 。与 xmlDoc.Save 节能是 - 从的XmlTextWriter 的不的加入BOM节约

只是保存到的TextWriter 来代替，这样就可以重新指定编码：

 使用（TextWriter的作家=新的StreamWriter（文件名，假的，
                                            新的UTF8Encoding（假））
{
    xmlDoc.Save（作家）;
}
 

How do remove the BOM from an XML file that is being created?

I have tried using the new UTF8Encoding(false) method, but it doesn't work. Here is the code I have:

XmlDocument xmlDoc = new XmlDocument();
XmlTextWriter xmlWriter = new XmlTextWriter(filename, new UTF8Encoding(false));
xmlWriter.Formatting = Formatting.Indented;
xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
xmlWriter.WriteStartElement("items");
xmlWriter.Close();
xmlDoc.Load(filename);
XmlNode root = xmlDoc.DocumentElement;
XmlElement item = xmlDoc.CreateElement("item");
root.AppendChild(item);
XmlElement itemCategory = xmlDoc.CreateElement("category");
XmlText itemCategoryText = xmlDoc.CreateTextNode("test");
item.AppendChild(itemCategory);
itemCategory.AppendChild(itemCategoryText);
xmlDoc.Save(filename);

解决方案

You're saving the file twice - once with XmlTextWriter and once with xmlDoc.Save. Saving from the XmlTextWriter isn't adding a BOM - saving with xmlDoc.Save is.

Just save to a TextWriter instead, so that you can specify the encoding again:

using (TextWriter writer = new StreamWriter(filename, false,
                                            new UTF8Encoding(false))
{
    xmlDoc.Save(writer);
}

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