Select more column from datatable with group and sum using linq

Question

1.00/5 (1 vote)

See more:

i am fresher in linq
datatable contain columns:

Idendity Name,
customer Name,
customer Contact Name,
Total Book Quantity,
Return Book Quality,
Quatan Book Qty,

group by contain three column Idendity Name, customer Name, customer Contact Name new column in select stamement Total Book contain ( total book quant+Quatan Book Qty-Return Book Quality) i want all column in gridview but grid contain Idendity Name, customer Name, customer Contact Name and total book columns missinf columns are ReturnBookQuality,QuatanBookQty please help me.

What I have tried:

C#

cmd = new SqlCommand(" ", con);

        da = new SqlDataAdapter(cmd);
        DataTable t_eight = new DataTable("t_eight");
        da.Fill(t_eight);//datatable "t_eight" fill

//linq query
    var query3 = (from a in t_eight.AsEnumerable()//t_eigth Datatable

                          group a by new
                          {//Group by with condition
    IdendityName = a.Field<string>("Idendity Name"),
    ContactPersonName = a.Field<string>("Contact Person Name"),
    CustomerName = a.Field<string>("Customer Name")
                          }
                              into g
                              select new
                              {
                                     IdendinyName = g.Key.IdendityName,
                                  ContactPersonName = g.Key.ContactPersonName,
                                  CurtomerName = g.Key.CustomerName,

    TotalBook = g.Sum(x => x.Field<int32>("Total Book Quantity")
                                      + x.Field<int32>("Quatan Book Qty") - x.Field<int32>("Return Book Quality"))
                              }
                  );

GridView1.DataSource = query3;
        GridView1.DataBind();

Posted 12-May-17 2:09am

Member 13196273

Updated 14-May-17 20:14pm

v3

Add a Solution

Comments

Richard Deeming 12-May-17 8:22am

So you've bound your grid to a query that returns four columns, and you're surprised that it's only displaying the four columns returned by your query?

If you want to display all of the columns from the DataTable, then just bind your grid to that DataTable.

Maciej Los 12-May-17 9:31am

Not clear! Please, be more specific and provide more details. Show us input data and expected result. This should help us to understand what you want to achieve.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Maciej Los · Answer 1 · 2017-05-12T03:38:00

If i understand you well...

On the first look, you have to group data only by Idendity Name and make some changes in your query code:

var query3 = (from a in t_eight.AsEnumerable()
                      group a by new
                      {
IdendityName = a.Field<string>("Idendity Name"),
ContactPersonName = a.Field<string>("Contact Person Name"),
CustomerName = a.Field<string>("Customer Name")
                      }
                          into g
                          select new
                          {
                              IdendinyName = g.Key.IdendityName,
                              ContactPersonName = g.Key.ContactPersonName,
                              CurtomerName = g.Key.CustomerName,
                              TotalBook = g.Sum(x => x.Field<int32>("Total Book Quantity"))
                                  + g.Sum(y => y.Field<int32>("Quatan Book Qty"))
                                  - g.Sum(z => z.Field<int32>("Return Book Quality"))
                          }
              ).ToList();

Let me know, if it's helpful...