求高手解答，急~~~~

string countryDHLId = "Area" + countryInfo.DHLArea.ToString();

var info = from df in db.DHLFreights
  where df.WeightMax >= weight && df.WeightMin <= weight
  select new
  {
  countryDHLId
  };

double dhlFreight = double.Parse(info.First().countryDHLId);

我想查DHLFreights 的某一个字段 countryDHLId 可能是Area1~~~Area9，可是为什么不能把这个字段的数据查出来呢
[解决办法]

string countryDHLId = "Area" + countryInfo.DHLArea.ToString();

var info = from df in db.DHLFreights
  where df.WeightMax >= weight && df.WeightMin <= weight
  select GetPropertyValue(df,countryDHLId);



private static object GetPropertyValue(object obj, string property)
{
    System.Reflection.PropertyInfo propertyInfo=obj.GetType().GetProperty(property);
    return propertyInfo.GetValue(obj, null);
}