提取xml文件显示

1\

/*** 提DataSet*/#region /*** 提DataSet*/
        /**//// <summary>
        /// 读取xml直接返回DataSet
        /// </summary>
        /// <param name="strXmlPath">xml文件相对路径</param>
        /// <returns></returns>
        public DataSet GetDataSetByXml(string strXmlPath)
        {
            try
            {
                DataSet ds = new DataSet();
                ds.ReadXml(strXmlPath);
                if(ds.Tables.Count > 0)
                {
                    return ds;
                }
                return null;
            }
            catch(Exception)
            {
                return null;
            }
        }
        #endregion

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DataSet ds = new DataSet();
   ds.ReadXml(p_strXmlPath);
     
   dataGrid1.DataSource=ds;
   dataGrid1.DataMember="user";

3\
  FileStream fs = new FileStream(p_strXmlPath,FileMode.Open,FileAccess.Read);
 StreamReader Reader = new StreamReader(fs,System.Text.Encoding.Default);
       
  DataSet ds = new DataSet();
  ds.ReadXml(Reader);
  txtName.Text=ds.GetXml();
  string physicalName =dt.Rows[0]["username"].ToString();
4\
XmlDocument xmlD = new XmlDocument();
   xmlD.Load(p_strXmlPath);
  //XmlNamespaceManager xmlns = new XmlNamespaceManager(xmlD.NameTable);   //带 xmlns的处理
    
  XmlNode root = xmlD.SelectSingleNode("myinfo");           //,xmlns;
  MessageBox.Show(root.InnerText);