asp.net读取Xml文件到DataSet，以及DataSet保存为Xml,利用自带的强大功能

<music>
<song>
<artist>The Chi-lites</artist>
<genre>Soul</genre>
<album>A lonely man</album>
<year>1972</year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>unknown</album>
<year></year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>The essential babyface</album>
<year>2001</year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>Grown and sexy</album>
<year>2005</year>
</song>
<song>
<artist>Maria Arredondo</artist>
<genre>Pop</genre>
<album>Not going under</album>
<year>2004</year>
</song>
<song>
<artist>Leona Lewis</artist>
<genre>Pop</genre>
<album>Unknown</album>
<year>2008</year>
</song>
<song>
<artist>Usher</artist>
<genre>R&B</genre>
<album>Usher</album>
<year>2008</year>
</song>
<song>
<artist>Christina Aguilera</artist>
<genre>Blues</genre>
<album>Back to basics</album>
<year>2004</year>
</song>
<song>
<artist>Sting</artist>
<genre>Pop</genre>
<album>Shape of my heart</album>
<year></year>
</song>
</music>

            DataSet ds = new DataSet();
TextReader reader = new StringReader(@"
<music>
<song>
<artist>The Chi-lites</artist>
<genre>Soul</genre>
<album>A lonely man</album>
<year>1972</year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>unknown</album>
<year></year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>The essential babyface</album>
<year>2001</year>
</song>
<song>
<artist>Babyface</artist>
<genre>R&B</genre>
<album>Grown and sexy</album>
<year>2005</year>
</song>
<song>
<artist>Maria Arredondo</artist>
<genre>Pop</genre>
<album>Not going under</album>
<year>2004</year>
</song>
<song>
<artist>Leona Lewis</artist>
<genre>Pop</genre>
<album>Unknown</album>
<year>2008</year>
</song>
<song>
<artist>Usher</artist>
<genre>R&B</genre>
<album>Usher</album>
<year>2008</year>
</song>
<song>
<artist>Christina Aguilera</artist>
<genre>Blues</genre>
<album>Back to basics</album>
<year>2004</year>
</song>
<song>
<artist>Sting</artist>
<genre>Pop</genre>
<album>Shape of my heart</album>
<year></year>
</song>
</music>
");
//读取Xml字符串 用来接收WebService返回数据
//ds.ReadXml(reader, XmlReadMode.Auto);

//读取Xml文件
ds.ReadXml(Server.MapPath("XML/Song.xml"));

//生成Xml文件
//ds.WriteXml(Server.MapPath("xml/song_bak.xml"));
GridView1.DataSource = ds;
GridView1.DataBind();

//读取txt文件
Stream stream = new FileStream(Server.MapPath("XML/demo.txt"), FileMode.OpenOrCreate, FileAccess.Read);
StreamReader readStream = new StreamReader(stream, System.Text.Encoding.GetEncoding("GB2312"));
string SourceCode = readStream.ReadToEnd();
readStream.Close();
Response.Write(SourceCode);