//利用XmlDoc只能以二級為單位插入
			string Nowmy=System.DateTime.Now.ToString();
			doc.Load("history.xml");
			int total=listViewReco.Items.Count;
			for(int i=0;i<total;i++)			{
				XmlElement newRecord=doc.CreateElement("record");
				newRecord.SetAttribute("name",listViewReco.Items[i].SubItems[0].Text.Trim());
				newRecord.SetAttribute("mobile",listViewReco.Items[i].SubItems[1].Text.Trim());
				newRecord.SetAttribute("content",listViewReco.Items[i].SubItems[2].Text.Trim());
				newRecord.SetAttribute("SendDate",Nowmy);	
				doc.DocumentElement.AppendChild(newRecord);				
			}
			XmlTextWriter tr=new XmlTextWriter("history.xml",null);
			tr.Formatting=Formatting.Indented;
			doc.WriteContentTo(tr);
			tr.Close();