编写linq查询以获取所选名称计数

Question

Here I need to get the total count of name Murugan my output should be "2" . How to write Linq Query for that

Linq:

Person[] names = {new Person { Name = "Murugan", Money = 15000 },
                                 new Person{Name="Vel",Money=17000},
                                 new Person{Name="Murugan",Money=1000},
                                  new Person{Name="Subramani",Money=18000},
                                 new Person{Name="Vel",Money=2500}};
var result = from val in names
         where val.Name == "Murugan" 
         select val;
Console.WriteLine(result);
Console.ReadLine();

Answer 1

尝试这个：

var count = names.Count(x=>x.Name=="Murugan");

Answer 2

You can use this,

var result = (from val in names
                          where val.Name == "Murugan"
                          select val).Count();

Answer 3

you can use this:

  var result = from val in names
               where val.Name == "Murugan"
               group val by val.Name into g
               select new { Count = g.Count()                   
               };

Answer 4

try:

Person[] names = { new Person { Name = "Murugan", Money = 15000 },
                   new Person{Name="Vel",Money=17000},
                   new Person{Name="Murugan",Money=1000},
                   new Person{Name="Subramani",Money=18000},
                   new Person{Name="Vel",Money=2500} };

var result = (from val in names
              where val.Name == "Murugan"
              select val).ToList();

Console.WriteLine(result.Count);
Console.ReadLine();

Answer 5

var result = (from val in names
                         where val.Name == "Murugan"
                         select val).Count ();

linq returns IEnumerable which has Count ()