XML读取的小例子

   public void CalculateLeave(string userAcount, string xml)   //传过来的是xml内容
         {
             try
             {
                 var xmlDoc = new System.Xml.XmlDataDocument();   //生成一个xml操作对象
                 xmlDoc.LoadXml(xml);    //加载xml内容文本      注意Load加载的是物理路径
                 var xmlRoot = xmlDoc.DocumentElement;        //使用 XmlDocument读取的方法，还有LINQ和XmlTextReader
                 if (xmlRoot == null) return;
                 var node = xmlRoot.SelectNodes("Item");    //找到所有的Item节点
                 if (node == null) return;
                 decimal sum = ;
                 foreach (XmlNode xn in node)
                 {
                     var singleNode = xn.SelectSingleNode("ExpenseType");  //SelectNodes和SelectSingleNode就是所有和单个的区别
                     if (singleNode == null || singleNode.InnerText != "年休假") continue;
                     var selectSingleNode = xn.SelectSingleNode("Days");
                     if (selectSingleNode == null) continue;
                     var day = selectSingleNode.InnerText;
                     sum += Convert.ToDecimal(day);
                 }
                 var user = BLL.MasterDataSservice.UserConfigureService.GetInstance().Get(userAcount);

                 user.Annualleave = Convert.ToDecimal(user.Annualleave) - sum;
                 BLL.MasterDataSservice.UserConfigureService.GetInstance().Update(user);
             }
             catch (Exception)
             {

             }
         }