how to find rows having same id and sum values in datatable

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Hi
I have a datatable having values

Date value
1/7/11 100
2/7/11 10
2/7/11 700
3/7/11 40

I want the datatable as

Date value
1/7/11 100
2/7/11 710
3/7/11 40

i want to sum the value column havind duplicate rows

Any help wil b appreciated

regards
chinnu

Posted 13-Jul-11 20:44pm

chinnu11

Updated 30-Nov-17 21:01pm

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3 solutions

Solution 3

var result = dt_UnSort.AsEnumerable().GroupBy(dr => dr.Field<string>("Datevalue")).Select(group => new { Datevalue= group.Key, Count = group.Sum(col => col.Field<int>("Count")) });

                DataTable dt_Sorted = dt_UnSort.Clone();
                foreach (var grp in result)
                    dt_Sorted.Rows.Add(grp.Datevalue, grp.Count);

Posted 30-Nov-17 21:01pm

waghniteen

Updated 24-May-18 19:53pm

v3

Comments

Kats2512 1-Dec-17 3:35am

6 year old question that has already got an accepted solution...

Member 13528638 31-Dec-17 15:47pm

This helped me :D

Solution 2

hi Al Moje

i used Dictionary<key,value>

Posted 14-Jul-11 17:40pm

chinnu11

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Al Moje · Accepted Answer · 2011-07-13T21:25:00

Hi,

Try this if could help...

DataTable x = new DataTable();
         IEnumerable<DataRow> dtrow = x.AsEnumerable();
         var dt = dtrow.GroupBy(dtl => dtl.Field<string>("TransDate"))
             .Select(dtg => new dtg
             {
                 dtl.Field<string>("TransDate") = dtg.Key,
                  dtrow.Sum(d => d.Field<double>("Amount"))
             }).ToList();

Regards,

Algem