在类的字段中动态搜索(每次都由其他字段)

Question

在我的'Person'课程中,我有一些字段,如'firstname','lastname','nickname'等等.

我想编写动态搜索的代码,有时候是'firstname',有时是'nickname'字段.

以常规方式,代码将是:

If(SearchBy == "firstname") 
{
     Person result = ListOfPerson.Where(p => p.firstname== "exp").FirstOrDefault();
}
else If(SearchBy == "nickname") 
{
      Person result = ListOfPerson.Where(p => p.nickname== "exp").FirstOrDefault();
}

但是我想写的代码应该是这样的:(每次保存if)

Object someVariable  = "firstname";

Person result = ListOfPerson.Where(p => p.someVariable == "exp").FirstOrDefault();

任何人都可以知道它是否可能？

Answer 1

这样的事情怎么样:

Func<Person, bool> searchDelegate;

switch (searchMode){
    case "firstname":
        searchDelegate = (p => p.firstname == searchValue);
        break;
    case "lastname":
        searchDelegate = (p => p.lastname == searchValue);
        break;
    case "nickname":
        searchDelegate = (p => p.nickname == searchValue);
        break;
    default:
        throw new Exception("searchMode is invalid");
}

return ListOFPerson.Where(seachDelegate).FirstOrDefault();