convert linq query results to datatable C#

Question

I want to convert the linq query results to datatable so that I can assign datatable to GridView to show it on asp page.

However I am not able to convert the results

Answer 1

You should get DataTableExtensions.CopyToDataTable

Remove ToList().

CopyToDataTable is an IEnumerable extension (unfortunately).

There is a solution with custom CopyToDataTable extension method below.

var gradeData = (from data in oAngieCtxt.prc_ShopInstanceCustomersData(
                 Convert.ToInt32(this.ShopInstanceID), 10000, false)
                .Where( row => row.RecievedPoints != "n/a" )
                .GroupBy(row => new { row.Name })
                .Select(g => new
                {
                    Name = g.Key.Name,
                    TotalPoints = g.Sum(x => Convert.ToDouble(x.RecievedPoints) 
                    * (x.Weightage.ToString() == "0.00" ? 1 
                      : Convert.ToDouble(x.Weightage)))
                })
                 select data);

var dt = gradeData.CopyToDataTable();

Edit:

Here is a more useful implementation of CopyToDataTable There is no type constraint to DataRow.

  public static class DataSetLinqOperators
  {
    public static DataTable CopyToDataTable(this IEnumerable source)
    {
        //you find the ObjectShredder implementation on the blog wich was linked.
        return new ObjectShredder().Shred(source, null, null);
    }

    public static DataTable CopyToDataTable(this IEnumerable source, 
                                     DataTable table, LoadOption? options)
    {
        return new ObjectShredder().Shred(source, table, options);
    }

  }