.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 == 1)
    {
        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;
}