在 Linq 中将行数据转换为列 [重复]

Question

我在变量“结果”中有如下数据

StaffName   ProjectName    Month      Weeks
Venkat      Project1       January    4
Venkat      Project1       February   2
Venkat      Project2       January    3
Kumar       Project1       March      5
Kumar       Project4       December   3

现在我想要下面的输出

StaffName   ProjectName   Jan   Feb  Mar  Dec   Total
Venkat       Project1      4     2               6
Venkat       Project2      3                     3
Kumar        Project1                 5          5
Kumar        Project4                      3     3

如果你有任何想法，请帮助我

Answer 1

我认为您想以动态方式执行此操作，但没有简单的方法。

所以只需使用GroupBy，卢克。像这样：

var res = data.GroupBy(x => new { x.StaffName, x.ProjectName })
    .Select(x => new
    {
        StaffName = x.Key.StaffName,
        ProjectName = x.Key.ProjectName,
        Jan = x.Where(y => y.Month == "January").Sum(y => y.Weeks),
        Feb = x.Where(y => y.Month == "February").Sum(y => y.Weeks),
        Mar = x.Where(y => y.Month == "March").Sum(y => y.Weeks),
        Dec = x.Where(y => y.Month == "December").Sum(y => y.Weeks),
        //Add more month here
        Total = x.Sum(y => y.Weeks)
    });

这是fiddle