¶ÁдxmlËùÓнڵã¸öÈËС½á ºÍ ¶ÁÈ¡xml½ÚµãµÄÊý¾Ý×ܽá

//´ò¿ªÄ³Îļþ(¼ÙÉèweb.configÔÚ¸ùĿ¼ÖÐ)
     string filename=Server.MapPath("/") + @"WebApplication1\web.config";
     XmlDocument xmldoc= new XmlDocument();
     xmldoc.Load(filename);
     //µÃµ½¶¥²ã½ÚµãÁбí
     XmlNodeList topM=xmldoc.DocumentElement.ChildNodes;
     foreach(XmlElement element in topM)
     {
      if(element.Name.ToLower()=="appsettings")
      {
       //µÃµ½¸Ã½ÚµãµÄ×Ó½Úµã
       XmlNodeList nodelist=element.ChildNodes;
       if ( nodelist.Count >0 )
       {
        //DropDownList1.Items.Clear();
        foreach(XmlElement el in nodelist)//¶ÁÔªËØÖµ
        {
         //DropDownList1.Items.Add(el.Attributes["key"].InnerXml);
         //this.TextBox2.Text=el.Attributes["key"].InnerText;
         this.TextBox2.Text=el.Attributes["key"].Value;
         this.Label1.Text=el.Attributes["value"].Value;
             //ͬÑùÔÚÕâÀï¿ÉÒÔÐÞ¸ÄÔªËØÖµ,ÔÚºóÃæsave¡£
          //   el.Attributes["value"].Value=this.TextBox2.Text;
        }
       }
      }
     }
     xmldoc.Save(filename);
ÔÚij½ÚµãÏÂÔö¼ÓÒ»¸öÔªËØ£¬²¢ÉèÖÃÖµ£º
     if(element.Name.ToLower()=="appsettings")
     {
 &n