C#LINQ在表上旋转

我有以下输入数据：

type    name    dept    salary
senior  ABC     123     2000
junior  ABC     456     1000
senior  IJK     456     3000
senior  LMN     123     2000
junior  LMN     123     1500
senior  STQ     123     2000

我希望获得以下旋转输出：

name    dept    junior_salary   senior_salary
ABC     123     0               2000
ABC     456     1000            0
IJK     456     0               3000
LMN     123     1500            2000
STQ     123     0               2000

以下是我编写的LINQ代码：

List<Posting> posting = getData();
posting.GroupBy(x=>new{x.type, x.name, x.dept})
       .Select(x=>new {
             name = x.Key.name,
             dept = x.Key.dept,
             junior_salary = x.Where(z=>x.Key.type=="junior").Sum(y=>y.salary),
             senior_salary = x.Where(z=>x.Key.type=="senior").Sum(y=>y.salary)
         }).ToList();

下面是我为运行示例而创建的小提琴：

我需要帮助

var pivotList = posting.GroupBy(x=>new{x.name, x.dept})
   .Select(x=>new {
         name = x.Key.name,
         dept = x.Key.dept,
         junior_salary = x.Where(z=>z.type == "junior").Sum(y=>y.salary),
         senior_salary = x.Where(z=>z.type == "senior").Sum(y=>y.salary)
     }).ToList();

修复方法是从GROUPBY子句中删除类型

这就是您需要的：

var pivotList =
    posting
        .GroupBy(x => new { x.name, x.dept })
        .Select(x => new
        {
            name = x.Key.name,
            dept = x.Key.dept,
            junior_salary = x.Where(z => z.type == "junior").Sum(y => y.salary),
            senior_salary = x.Where(z => z.type == "senior").Sum(y => y.salary)
        })
        .ToList();

---

您不应该按

类型分组

不正确的结果？您希望我们对该语句做什么？您不需要进行名称检查，因为您是根据名称分组的，组中的所有值都将与键中的名称匹配。此外，还应指定修复程序从分组中删除类型。

var pivotList =
    posting
        .GroupBy(x => new { x.name, x.dept })
        .Select(x => new
        {
            name = x.Key.name,
            dept = x.Key.dept,
            junior_salary = x.Where(z => z.type == "junior").Sum(y => y.salary),
            senior_salary = x.Where(z => z.type == "senior").Sum(y => y.salary)
        })
        .ToList();