c# - 如何在 C# 中同时返回一个字符串和一个元素列表？

Question

在c#中有没有办法返回一个字符串参数和一个列表给方法？

List<cCountry> countries = new List<cCountry>();
            countries = GetCountries(userProfile.Country);


     private List<cCountry> GetCountries(string p)
            {
                inputCollection = new cDTOCollection<cDTOBase>();
                outputCollection = new cDTOCollection<cDTOBase>();
                outputCollection = UpdateProfileBizobj.ProcessRequest(ActionConstants.ActionGetCountriesList, null);
                List<cCountry> countries = new List<cCountry>();
                cDTOSingleValue SelectedCountryID = new cDTOSingleValue();
                foreach (cDTOCountry countryItem in outputCollection)
                {
                    if (p == countryItem.CountryName)
                        SelectedCountryID.Id = countryItem.CountryID;

                    countries.Add(Mapper.Map<cDTOCountry, cCountry>(countryItem));
                }
                countries.Remove(countries[0]);
                return countries;
            }

Like in the method above I need to return a parameter SelectedCountryID and also the countries list.Is there any way to return both?

Answer 1

填充并返回一个对象。

public class ReturnObject
{
    public List<cCountry> Countries { get; set; }
    public guid SelectedCountryID { get; set; } // don't think you defined what type SelectedCountryID is in your question
}

但是如果您发现自己需要返回超过 1 个东西，这可能表明您的方法做的太多了，应该重构。

为什么不能重用发送给方法的值？