.NET获取城市信息（将三字代码转换成城市名）

整理代码，发现有一个从两张表里读取城市列表，然后linq和lambda表达式来获取城市名的函数，代码如下：

 public static string GetCityHotelText(string city, int VerNum)
 {
     string ucbcField, airPortField;
     string cityText = ucbcField = airPortField = "";
     //vernum控制中英文显示版本
     if (VerNum == )
     {
         ucbcField = "CityNameEN";
         airPortField = "CityName_en";
     }
     else
     {
         ucbcField = "CityNameCN";
         airPortField = "CityName_zh";
     }
     //两张表，datatable，读表的方法就不写了
     DataTable ucbcs = null;
     DataTable airPorts =null;
     try
     {
         var query = ucbcs.AsEnumerable().Where(ucbc => ucbc.Field<string>("CityCode").ToLower() == city.ToLower());
         if (query.Any())
         {
             cityText = query.First().Field<string>(ucbcField);
         }
         else
         {
             var query2 = from airPort in airPorts.AsEnumerable()
                                  where airPort.Field<string>("Code").ToLower() == city.ToLower()
                                  select airPort;
             if (query2.Any())
             {
                 cityText = query2.First().Field<string>(airPortField);
             }
         }
     }
     catch (Exception e)
     {
     }
     if (string.IsNullOrEmpty(cityText))
     {
         cityText = city;
     }
     return cityText;
 }