Nested Loops problem

Question

I am trying to achieve the bottom result .So far I tried with nested loops without sucsees.Any other sugestions?

Vulpes · Answer

I think you'll find it easier if you sort the DataTable by EmpID to start with. I've done it again without using LINQ but using the data in my first post so I can check it's giving the same results, which it is: using System; using System.Data; class Program { static void Main() { DataTable dt = new DataTable(); dt.Columns.Add("EmpID"); dt.Columns.Add("Mon", typeof(int)); dt.Columns.Add("Tue", typeof(int)); dt.Columns.Add("Wed", typeof(int)); dt.Columns.Add("Thu", typeof(int)); dt.Columns.Add("Fri", typeof(int)); dt.Columns.Add("Sat", typeof(int)); dt.Columns.Add("Sun", typeof(int)); // mix them up a bit dt.Rows.Add("Emp1",4,0,0,0,0,0,0); dt.Rows.Add("Emp2",0,4,0,0,0,0,0); dt.Rows.Add("Emp1",0,0,0,5,0,0,0); dt.Rows.Add("Emp2",0,0,5,0,0,0,0); dt.Rows.Add("Emp2",0,0,0,0,0,0,3); dt.Rows.Add("Emp1",0,0,0,0,8,0,0); DataView dv = dt.DefaultView; dv.Sort = "EmpID"; // sort by EmpID DataTable dt2 = dv.ToTable(); DataTable dt3 = dt.Clone(); string id = ""; string temp = null; int[] total = new int[7]; object[] oa = null; DataRow r = null; foreach(DataRow dr in dt2.Rows) { temp = dr[0].ToString(); if (id == "") { id = temp; } else if (id != temp) { r = dt3.NewRow(); oa = new object[8]; oa[0] = id; for(int i = 1; i r.ItemArray = oa; dt3.Rows.Add(r); id = temp; Array.Clear(total, 0, 7); } for(int i = 0; i { total[i] += (int)dr[i + 1]; } } // add the final row to the combined table r = dt3.NewRow(); oa = new object[8]; oa[0] = id; for(int i = 1; i r.ItemArray = oa; dt3.Rows.Add(r); // check it worked foreach(DataRow dr in dt3.Rows) { foreach(object o in dr.ItemArray) { Console.Write("{0} ", o); } Console.WriteLine(); } Console.ReadKey(); } }

Lio Liov · Answer

Thank you very much, I spend one day trying to acomplish that. I realy appreciate your help. I tried to add first and last name. and so far I god this code, but it is erroring out.

Lio Liov · Answer

Thanks. Unfortunately I dont have Linq avaliable in my framework.

Vulpes · Answer

Assuming that the data is held in a DataTable as per your previous thread ( http://www.c-sharpcorner.com/Forums/Thread/245498/iteration-throug-array.aspx ), then you can do it using LINQ as follows: using System; using System.Data; using System.Linq; class Program { static void Main() { DataTable dt = new DataTable(); dt.Columns.Add("EmpID"); dt.Columns.Add("Mon", typeof(int)); dt.Columns.Add("Tue", typeof(int)); dt.Columns.Add("Wed", typeof(int)); dt.Columns.Add("Thu", typeof(int)); dt.Columns.Add("Fri", typeof(int)); dt.Columns.Add("Sat", typeof(int)); dt.Columns.Add("Sun", typeof(int)); dt.Rows.Add("Emp1",4,0,0,0,0,0,0); dt.Rows.Add("Emp1",0,0,0,5,0,0,0); dt.Rows.Add("Emp1",0,0,0,0,8,0,0); dt.Rows.Add("Emp2",0,4,0,0,0,0,0); dt.Rows.Add("Emp2",0,0,5,0,0,0,0); dt.Rows.Add("Emp2",0,0,0,0,0,0,3); DataTable dt2 = dt.Clone(); var query = from DataRow dr in dt.Rows group dr by dr[0] into g select new { EmpId = g.Key.ToString(), Mon = (from DataRow r in g select (int)r[1]).Sum(), Tue = (from DataRow r in g select (int)r[2]).Sum(), Wed = (from DataRow r in g select (int)r[3]).Sum(), Thu = (from DataRow r in g select (int)r[4]).Sum(), Fri = (from DataRow r in g select (int)r[5]).Sum(), Sat = (from DataRow r in g select (int)r[6]).Sum(), Sun = (from DataRow r in g select (int)r[7]).Sum() }; foreach(var r in query) { DataRow dr = dt2.NewRow(); object[] oa = {r.EmpId, r.Mon, r.Tue, r.Wed, r.Thu, r.Fri, r.Sat, r.Sun}; dr.ItemArray = oa; dt2.Rows.Add(dr); } // check it worked foreach(DataRow dr in dt2.Rows) { foreach(object o in dr.ItemArray) { Console.Write("{0} ", o); } Console.WriteLine(); } Console.ReadKey(); } } The output is: Emp1 4 0 0 5 8 0 0 Emp2 0 4 5 0 0 0 3

Nested Loops problem

Answers (4)