1

我有下面的 Employee 类，它有 3 个重要字段

public class Employee
{
    public string Name
    {
        get;
        set;
    }

    public string Department
    {
        get;
        set;
    }

    public double Salary
    {
        get;
        set;
    }
}

我有一份此类员工的名单。我想从每个部门中找出其部门中薪水最高的员工姓名。

我写了下面的查询，但它不起作用。

List<Employee> list = new List<Employee>();
        list.Add(new Employee { Name="Hemant",Salary=10,Department="PTS"});
        list.Add(new Employee { Name = "Gunjan", Salary = 11, Department = "PTS" });
        list.Add(new Employee { Name = "Akshay", Salary = 8, Department = "PTS" });
        list.Add(new Employee { Name = "Omkar", Salary = 10, Department = "EBG" });
        list.Add(new Employee { Name = "Hemant1", Salary = 14, Department = "EBG" });

        var query1 = from e in list
                    group e by e.Department into g
                    select new { Dept = g.Key,MaxSal = g.Max((e) => e.Salary )};

        foreach (var item in query1)
        {
            Console.WriteLine("Department : " + item.Dept + "  :  " + " Salary is : " + item.MaxSal);                
        }

但是上面的代码不起作用，我无法选择员工姓名。我想我必须使用升序/降序子句并选择第一条或最后一条记录。但我无法弄清楚。有人可以帮忙吗。

问候， Hemant Shelar

4

1 回答 1

3

是的，你应该OrderByDescending然后得到First：

var query1 = list.GroupBy(x => x.Department)
                 .Select(g => g.OrderByDescending(x => x.Salary).First());

下面是控制台代码：

foreach (var item in query1)
{
    string output = string.Format("Deparment: {0}, Name: {1}, Max Salaray: {2}",
                                  item.Department, item.Name, item.Salary
        );

    Console.WriteLine(output);
}
于 2013-05-05T05:52:02.573 回答