XmlWriter.WriteString() problem__“.”(十六进制值 0x00)是无效的字符。

Tom Delany wrote:
> According to the Microsoft documentation, the .NET class
> System.Xml.XmlWriter.WriteString() does the following:
>
> "Character values in the range 0x-0x1F (excluding white space characters
> 0x9, 0xA, and 0xD) are replaced with numeric character entities (�
> through &#0x1F)."
>
> However, when we call WriteString() in an application we have written, we
> are seeing the following exception being thrown:
>
> System.ArgumentException: '', hexadecimal value 0x12, is an invalid
> character.
> at System.Xml.XmlUtf8RawTextWriter.InvalidXmlChar(Int32 ch, Byte*
> pDst, Boolean entitize)
> at System.Xml.XmlUtf8RawTextWriter.WriteElementTextBlock(Char* pSrc,
> Char* pSrcEnd)
> at System.Xml.XmlUtf8RawTextWriter.WriteString(String text)
> at System.Xml.XmlUtf8RawTextWriterIndent.WriteString(String text)
> at System.Xml.XmlWellFormedWriter.WriteString(String text)
>
> Anyone ever seen anything like this? Any idea what I am doing wrong?

XmlTextWriter in the .NET framework 1.0/1.1 did that and XmlTextWriter
in the .NET framework 2.0 still does that but the normal XmlWriter you
create with e.g. XmlWriter.Create has been fixed to be compliant with
the XML 1.0 specification and to ensure (by default) that the output is
well-formed and even escaping those characters is not allowed in the XML
1.0 specification.
So use new XmlTextWriter to create an XmlTextWriter or if you want to
use XmlWriter.Create, then use XmlWriterSettings with CheckCharacters
set to false e.g.

XmlWriterSettings writerSettings = new XmlWriterSettings();
writerSettings.CheckCharacters = false;
using (XmlWriter xmlWriter = XmlWriter.Create("file.xml",
writerSettings))
{
// ...
}

writerSettings.CheckCharacters = false;设置为false将不检查字符 就不会出现“.”(十六进制值 0x00)是无效的字符。类似的情况了,哇咔咔