How to build pivot table through linq using c#

Question

I have got this datatable in my c# code:

Date     | Employee | Job1 | Job2 |  Job3 |
---------|----------|------|---         


        

Answer 1

You won't be able to do this with LINQ due to the dynamic nature of the columns. LINQ to SQL needs a static way to map result set fields to property values. Instead, you can look into the PIVOT SQL statement and fill the results into a DataTable

http://msdn.microsoft.com/en-us/library/ms177410(v=sql.105).aspx

Answer 2

var query = from foo in db.Foos
            group foo by foo.Date into g
            select new {
                Date = g.Key,
                A = g.Where(x => x.Employee == "A").Sum(x => x.Job1),
                B = g.Where(x => x.Employee == "B").Sum(x => x.Job1),
                C = g.Where(x => x.Employee == "C").Sum(x => x.Job1),
                D = g.Where(x => x.Employee == "D").Sum(x => x.Job1),
                Total = g.Sum(x => x.Job1)
            };

You can also apply OrderBy(x => x.Date) to query.