如何保存XmlDocument 速结!!!
Answersheet she = PaperAnalyseManager.GetAnswer(paperID, USERManager.GetUserById(userID).Name);
string AnswerStr = she.Results;
XmlDocument Xml = new XmlDocument();
Xml.LoadXml(AnswerStr);
XmlElement eleProblem = (XmlElement)Xml.DocumentElement.SelectSingleNode("PR[@PID=" + problemID + "]");
eleProblem.SetAttribute("SCORE", value);
eleProblem.SetAttribute("SCORED", "1");
Xml.Save(AnswerStr);
AnswerStr="<PRESULT><PR PID="1" TYPE="3"><ANSWER MARKED="0"><MAIN /><SUBS><SUB><![CDATA[fdsfds]]></SUB></SUBS></ANSWER><RESULT RIGHT="0" SCORED="0" SCORE="0" /><TIME SPEND="0" /></PR><PR PID="28" TYPE="3"><ANSWER MARKED="0"><MAIN /><SUBS><SUB><![CDATA[fds]]></SUB></SUBS></ANSWER><RESULT RIGHT="0" SCORED="0" SCORE="0" /><TIME SPEND="0" /></PR><PR PID="47" TYPE="3">......";
保存的时候失败 如何解决这个问题