一。读取xml 如果时间不对就添加一个。如何对的就修改当前时间添加1.

public class RederXml    {        private static string path = AppDomain.CurrentDomain.BaseDirectory + "XML/TaoBaoNum.xml";        public static void Readxml()        {            using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))            {                XmlDocument doc = new XmlDocument();                doc.Load(fs);                XmlNode root = doc.SelectSingleNode("root");                XmlNode Num = root.SelectSingleNode(String.Format("Num[@name='{0}']", DateTime.Now.ToString("yyyy-MM-dd")));                if (Num == null)                {                    XmlElement xe1 = doc.CreateElement("Num");//创建一个﹤book﹥节点                     xe1.SetAttribute("name", DateTime.Now.ToString("yyyy-MM-dd"));//设置该节点genre属性                     xe1.InnerText = "1";//设置节点的文本值                     root.AppendChild(xe1);                }                else                {                    long num = Convert.ToInt64(Num.InnerText.ToString());                    num++;                    Num.InnerText = num.ToString();                }                doc.Save(path);//保存。             }        }    }

 xml

       
      
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      //调用  XML.RederXml.Readxml();