在日期时间上使用分组依据-Linq查询

Question

I am trying to do a group depending on the DateTime field from the SQLServer Database using Linq query. Below is what I am trying

        var result = _context.sRProject
                             .Where(x => x.r_Project == rep)
                             .GroupBy(x => new { x.s_Date }).ToList();
        return result;

Here s_Date is the DateTime field within the DB. I get the below error on the result like

Cannot implicitly convert type 'System.Collections.Generic.List, Model.sRProject>>' to 'System.Collections.Generic.List'

I have in the model class like

    public class sRProject : IsRProject
  {
    public DateTime? s_Date { get; set; }
    public string delivery { get; set; }
    public DateTime? delDate { get; set; }
    public string po { get; set; }
    public string so { get; set; }
    public string r_Project { get; set; }
  }

The SQL query I am trying to achieve is like below

   SELECT   [s_Date],[delivery],[delDate],[po],[so],[r_Project]
              FROM [sDev].[dbo].[PrjDetails] 
              where [r_Project] = @rep  
              group by [s_Date],[delivery],[delDate],[po],[so],[r_Project]

What am I missing here?

Answer 1

Frame a LINQ query like below:

var result = _context.sRProject
                             .Where(x => x.r_Project == rep)
                             .GroupBy(x => new { x.s_Date }).Select(x=>new sRProject{s_Date =x.Key.s_Date, delivery =x.Key.delivery, delDate=x.Key.delDate, po =x.Key.po, so =x.Key.so, r_Project=x.Key.r_Project }).ToList();
        return result;

Return type of your method should be sRProject