Remove duplication row in gridview

问题

I have four column, facilities_id, name, date and quantity for my gridview. My problem is it have same facilities_id in my result. So how can i settle it, anyone can help me? Thanks..

In additional, i hope can find the top 2 row in gridview. Mean just show up the top 2 row.. Thanks

    DataClassesDataContext db = new DataClassesDataContext();


    var query = from p in db.Facilities
                join v in db.Reservations on p.facilities_id equals v.facilities_id
                join c in db.Reservation_Details on v.reservation_id equals 
                c.resevation_id

                where SqlMethods.Like(c.date, "%" + DropDownList1.Text + "%")
                select new
                {
                    p.facilities_id,
                    p.name,
                    c.date,
                    Quantity = p.Reservations.Count()

                };

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

Here is my output, how to remove the same facilities_id.

facilities_id  name    date        quantity
  F001           aa    12/01/2014      1
  F001           aa    12/01/2014      12
  F002           bb    12/01/2014      1
  F003           cc    12/01/2014      1

i hope can become like this.

facilities_id  name    date        quantity
  F001           aa    12/01/2014      13
  F002           bb    12/01/2014      1
  F003           cc    12/01/2014      1

回答1:

GridView1.DataSource = query.DistinctBy( i => i.facilities_id);

You can use GroupBy() and select the first item of each group to achieve what you want - assuming you want to pick one item for each distinct facilities_idproperty:

  GridView1.DataSource  = query.GroupBy(x => x.facilities_id)
                         .Select(g => g.First())
                         .ToList();

回答2:

This is the code for unique facilities_id. I dont know that you are getting data from dataset or table.

I have return a code which is retrieving the code in dataset and that dataset going to be unique.

And also your quantity will be added but facilities_id will not be repeated.

     var sells = from row in ds.Tables["cartTable"].AsEnumerable() ("Write here your table name as I dont know your table name ")
                    group row by row.Field<string>("facilities_id") into rowGroup
                    select new
                    {
                        facilities_id = rowGroup.Key,

                        name = string.Join(" ", rowGroup.Select(row => row.Field<string>("name")).Distinct().ToArray()),

                        date = string.Join(" ", rowGroup.Select(row => row.Field<string>("date")).Distinct().ToArray()),

                        price = string.Join(" ", rowGroup.Select(row => row.Field<decimal>("price")).Distinct().ToArray()),

                        Quantity = rowGroup.Sum(r => r.Field<int>("quantity")),

                    };


I hope this code will be useful to you......!!!!

来源：https://stackoverflow.com/questions/22454013/remove-duplication-row-in-gridview

标签

ASP.NET

gridview