访问C＃中的List结构项 [英] access to item of List structure in C#

问题描述

大家好，

我的结构如下：

如何在列表中找到类型为结构的项目？

（don'使用For循环）

Hi all,
I have structure as below:
how to find item in list with type is structure?
(don't use For loop)

struct person{
 public int age;
 public string name;
}

public list<person> lstPerson;
public void getListPerson(){
    lstPerson = new list<person>();
    lstperson.Add(New person{age = 10, name="John"});
    lstperson.Add(New person{age = 20, name="John1"});
    lstperson.Add(New person{age = 30, name="John2"});
    lstperson.Add(New person{age = 40, name="John3"});
    lstperson.Add(New person{age = 50, name="John4"});
    lstperson.Add(New person{age = 60, name="John5"});
    lstperson.Add(New person{age = 70, name="John6"});
}

public person searchPerson(string name){
  // how to find person with name is John3 in lstPerson?(don't use loop: For or While)
}

推荐答案

尝试：

Try:

person p = lstPerson.Where(p => p.name == "John3").FirstOrDefault();
if (p != null)
   {
   ...
   }

[edit]

适用于课程，而不是结构 - 抱歉，我没有注意到。

[edit]
That works for classes, not structs - sorry, I didn't notice.

List<person> matches = lstPerson.Where(p => p.name == "John3").ToList();
if (matches.Count >= 1)
   {
   person p = matches[0];
   ...
   }

[.edit]

[.edit]

public person searchPerson(string name)
       {
           var objPers = lstPerson.Where(_ => _.name == name).FirstOrDefault();
           return objPers;
       }

public person searchPerson(string name){
   person _person = lstPerson.Where(x => x.name == name).FirstOrDefault();
   return _person;
}

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