access to item of List structure in C#

Question

1.00/5 (1 vote)

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

C#

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)
}

Posted 16-Jun-15 21:43pm

ngthtra

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Tomas Takac 17-Jun-15 3:53am

We don't do your homework.

5 solutions

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OriginalGriff · Answer 1 · 2015-06-16T21:56:00

Try:

C#

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

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

C#

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

[.edit]

CoNFiDeNT-HaKaN · Answer 2 · 2015-06-16T22:02:00

Solution 2

C#

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

Posted 16-Jun-15 22:02pm

CoNFiDeNT-HaKaN

sasanka sekhar panda · Answer 3 · 2015-06-16T22:10:00

Solution 3

C#

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

Posted 16-Jun-15 22:10pm

sasanka sekhar panda

Updated 16-Jun-15 22:11pm

sasanka sekhar panda · Answer 4 · 2015-06-16T23:35:00

Solution 5

C#

  public  IEnumerable<person> searchPerson(person abc)
   {


IEnumerable<person> p = lstPerson.Where(x => x.name == abc.name || x.age==abc.age);
return p;
   }

Posted 16-Jun-15 23:35pm

sasanka sekhar panda

Updated 16-Jun-15 23:37pm

v2

ngthtra · Answer 5 · 2015-06-16T23:15:00

Solution 4

how to search dynamic field in list?
ex: search base on age, or any field if this structure have many feild

Posted 16-Jun-15 23:15pm