读写xml文件.txt

c#的知识类库

using System;
using System.Data;
using System.IO;
using System.Xml;
DataSet myDataSet=new DataSet();
			FileStream fsReadXml=new FileStream(myFilename,FileMode.Open);
			XmlTextReader myXmlReader=new XmlTextReader(fsReadXml);
			myDataSet.ReadXml(myXmlReader);
			myXmlReader.Close();
			//提出当前选票的个数的字符
			string votes=myDataSet.Tables[1].Rows[answer-1].ItemArray[1].ToString();
			int votesInt=int.Parse(votes);//转化为整数
			//int votesInt=Votes[answer];
			DataRow myVotesRow=myDataSet.Tables[1].Rows[answer-1];//提取当前操作行
			myVotesRow["Votes"]=(votesInt+1).ToString();//修改
			StreamWriter myStream=new StreamWriter(myFilename);//建立写流
			myDataSet.WriteXml(myStream,XmlWriteMode.IgnoreSchema);//保存文件
			myStream.Close();