XmlDocument xml = new XmlDocument();
xml.LoadXml(str); //str:具有xml格式的字符串
XmlNodeReader reader = new XmlNodeReader(xml);
DataSet ds = new DataSet();
ds.ReadXml(reader);
XmlDocument xml = new XmlDocument();
xml.LoadXml(str); //str:具有xml格式的字符串
XmlNodeReader reader = new XmlNodeReader(xml);
DataSet ds = new DataSet();
ds.ReadXml(reader);