Error when using FromSql and include (“The Include operation is not supported when calling a stored procedure.”)

问题

I used Asp.Net Core version 2 and code-first. I tried to use .FromSql to call a stored procedure. I did the same as Microsoft said:

var blogs = context.Blogs
                   .FromSql($"SELECT * FROM dbo.SearchBlogs({searchTerm})")
                   .Include(b => b.Posts)
                   .ToList();

and my stored procedure only contains the line of code

 ALTER PROCEDURE [dbo].[GetCouffierSearch]  
 AS
 BEGIN
     SET NOCOUNT ON;

     SELECT * 
     FROM AspNetUsers
END

My code in the API:

public IQueryable<ApplicationUser> SelectNearByUser()
{
    var query = "execute dbo.GetCouffierSearch";
    var res = _context.Users.FromSql(query);
    return res.Include(x => x.CoiffeurServiceLevels);
}

and my class ApplicationUser contains definition for CoiffeurServiceLevels with type of ICollection:

public class ApplicationUser: IdentityUser
{
        public ApplicationUser()
        {         
            //CoiffeurServiceLevels = new Collection<CoiffeurServiceLevel>();
            //Requests = new Collection<Request>();
            //Tickets = new Collection<Ticket>();        
            //UserRatings = new Collection<Rating>();
            //CouffierRatings = new Collection<Rating>();
        }

        public string PhotoUrl { get; set; }

        public string Lat { get; set; }
        public Language Language { get; set; }

        public string Address { get; set; }
        public string FullName { get; set; }
        public string Lng { get; set; }
        public string PersonalId { get; set; }

        public Place Places { get; set; }
        public long? PlaceId { get; set; }

        public int? CouffierNumber { get; set; } = 1;

        public long CityId { get; set; }
        public City City { get; set; }

        public bool IsSuspended { get; set; }
        public bool IsOnline { get; set; }
        public string ConfirmedToken { get; set; }
        public string ResetPasswordlToken { get; set; }
        public  DateTime BirthDate { get; set; }

        public bool Gender { get; set; } 

        //#region RelationsClass

        public virtual ICollection<CoiffeurServiceLevel> CoiffeurServiceLevels { get; set; }
        // public ICollection<Request> Requests { get; set; }
        ////public ICollection<Request> RequestsCouffier { get; set; }
        //public virtual ICollection<Ticket> Tickets { get; set; }
        public virtual ICollection<Rating> UserRatings { get; set; }
        //public virtual ICollection<Rating> UserRatingsBy { get; set; }
        //public ICollection<IdentityRole> Roles { get; set; }

        //Roles = new Collection<IdentityUserRole>();
        //#endregion
}

When I call it, I get this error:

Message: The Include operation is not supported when calling a stored procedure.
Source: Microsoft.EntityFrameworkCore.Relational

回答1:

You can explicitly load a navigation property via the DbContext.Entry(...) API. https://docs.microsoft.com/en-us/ef/core/querying/related-data#explicit-loading

public IQueryable<ApplicationUser> SelectNearByUser()
{
    var query = "execute dbo.GetCouffierSearch";
    var res = _context.Users.FromSql(query);
    _context.Entry(res)
            .Collection(x => x.CoiffeurServiceLevels)
            .Load();
    return res;
}

回答2:

I had the same issue and have found that if you load both entities separately they auto-link together as long as the data model supports this.

I have customer entities loaded via a stored procedure with a showroom ID and I wanted to display the name of the showroom from the showroom table:

First I populate the showrooms:

Showroom = await _context.Showroom.ToListAsync();

Then I call my stored procedure for the customer object:

Customer = await _context.Customer
            .FromSql("EXEC sp_GetCustomerList @SearchString, @SortString", searchParam, sortParam)
            .ToListAsync();

Lastly I can now access the values from the showrooms list using this syntax:

@Html.DisplayFor(modelItem => item.Showroom.ShowroomName)

I am not sure if there is much of a performance impact doing it this way as you are essentially executing two queries rather than one.

回答3:

I Used Ado.net And Call Procedure

DataTable dt = new DataTable();
            using (SqlConnection sqlConn = new SqlConnection(_context.Database.GetDbConnection().ConnectionString))
            {
                string sql = "<ProcedureName>";
                using (SqlCommand sqlCmd = new SqlCommand(sql, sqlConn))
                {
                    sqlCmd.CommandType = CommandType.StoredProcedure;
                    sqlCmd.Parameters.AddWithValue("@ServiceId", string.Join(',', servicesIds.ToArray()));

                    sqlCmd.Parameters.AddWithValue("@Page", page);
                    sqlCmd.Parameters.AddWithValue("@PageSize", pageSize);
                    sqlConn.Open();
                    using (SqlDataAdapter sqlAdapter = new SqlDataAdapter(sqlCmd))
                    {
                        sqlAdapter.Fill(dt);
                    }
                }
            }

来源：https://stackoverflow.com/questions/47122425/error-when-using-fromsql-and-include-the-include-operation-is-not-supported-wh