c# - 在类的字段中动态搜索(每次通过其他字段)

Question

在我的“Person”类中，我有一些字段，如“firstname”、“lastname”、“nickname”等。

我想编写代码来动态搜索，有时按“名字”字段，有时按“昵称”字段。

按照常规方式，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();

谁能知道这是否可能？

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();