I have a wpf c# app.
I have to list collections.
I want to join these 2 lists and return the results that match a criteria.
I want the result to be loaded into a new list/model.
This is my code so far:
var Results = from j in res
join c in Customer.GetBaseData() on j.CustomerRef equals c.CustomerRef
where j.JobStatusRef == jobStatusRef
select new {
c.CustomerRef,
c.CustomerId,
c.Add1,
c.Town,
c.FName,
c.SName,
j.DateReq,
j.JobId,
j.JobRef,
j.JobStatus
};
This is my destination model:
public class CustomerJobs
{
public int JobId { get; set; }
public string CustomerRef { get; set; }
public string DateReq { get; set; }
public string JobRef { get; set; }
public string JobStatus { get; set; }
public int CustomerId { get; set; }
public string SName { get; set; }
public string FName { get; set; }
public string Add1 { get; set; }
public string Town { get; set; }
}
I do not know how to do this final step?
Instead of creating an anonymous type with new { ... }, directly use your model in the select:
var Results = from j in res
join c in Customer.GetBaseData() on j.CustomerRef equals c.CustomerRef
where j.JobStatusRef == jobStatusRef
// Note the "new CustomerJobs" part.
select new CustomerJobs {
c.CustomerRef,
c.CustomerId,
c.Add1,
c.Town,
c.FName,
c.SName,
j.DateReq,
j.JobId,
j.JobRef,
j.JobStatus
};
When you select in linq you can specify the type of the object like:
var Results = from j in res
join c in Customer.GetBaseData() on j.CustomerRef equals c.CustomerRef
where j.JobStatusRef == jobStatusRef
select new CustomerJobs {
CustomerRef = c.CustomerRef,
CustomerId = c.CustomerId,
Add1 = c.Add1,
Town = c.Town,
FName = c.FName,
SName = c.SName,
DateReq = j.DateReq,
JobId = j.JobId,
JobRef = j.JobRef,
JobStatus = j.JobStatus
};
Related
My question is, inside my join of IDs, is it possible to add another column with an ID?
This is what I am trying to do:
My Index:
var orders= db.Orders.ToList();
var colers = db.Colors.ToList();
var result = (from c in orders
join st in colers on c.ID_Orders equals st.id into table1
select new OrderWithColorsViewModel { order =c, colers = table1.ToList()
}).ToList();
return View(result);
My classes:
public partial class Orders
{
public int ID_Orders { get; set; }
public Nullable<System.DateTime> Data_Registo { get; set; }
public string Num_Encomenda { get; set; }
public string Ref_Cliente { get; set; }
}
public partial class Colors
{
public int ID_Orders { get; set; }
public int ID_Line_Color { get; set; }
public string Color{ get; set; }
}
public partial class Quantities
{
public int ID_Orders { get; set; }
public int ID_Line_Color { get; set; }
public int quantity{ get; set; }
}
Of what I am learning right now I have this from my join:
and:
But what I want (I think):
If i am wrong in thinking, correct me, thanks
I leave my solution here for those who need it
var result1 = (from o in order
join c in coler
on o.ID_Programa equals c.ID_Programa into co
group new { o, co } by o.ID_Programa into g
from i in g
select new { order = i.o, colors = i.co }).ToList();
var result2 = (from r1 in result1
from c in r1.colors
join q in quant
on new { orderId = c.ID_Programa, colorlineId = c.ID_Linha_Cor } equals new { orderId = q.ID_Programa, colorlineId = q.ID_Linha_Cor } into p1
from p in p1
join s in statu
on new { orderId = p.ID_Programa, colorlineId = p.ID_Linha_Cor } equals new { orderId = s.ID_Programa, colorlineId = s.ID_Linha_Cor } into q
group new ColorsAndQuantities { coler = c, quant = p1.ToList(), status = q.ToList() } by c.ID_Programa).ToList();
var result = (from r1 in result1
join m in fabric
on r1.order.ID_Programa equals m.ID_Programa into t
from t1 in t
join r2 in result2
on t1.ID_Programa equals r2.Key
select new OrdersColorsViewModel
{
order = r1.order,
malhas = t1,
colers = r2.ToList()
}).ToList();
I have code that looks something like this bug getting error: the specified type member 'TimeBandDescription' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported. How do I make this AsEnuermable?
public partial class TimeBand
{
public TimeBand()
{
}
public int Id { get; set; }
public string Name { get; set; }
public long From { get; set; }
public long To { get; set; }
[NotMapped]
public string TimeBandDescription => $"{Name} ({TicksToHhMmFormat(From)} - {TicksToHhMmFormat(To)})";
private static string TicksToHhMmFormat(long ticks)
{
if (ticks == long.MaxValue)
{
return "Max";
}
var timeSpan = new TimeSpan(ticks);
return $"{(int)timeSpan.TotalHours}{timeSpan.ToString(#"\:mm")}";
}
}
public class SuplierService : ISuplierService
{
public SupplierInfoModel GetSupplierList(int supplierId)
{
var query = (from s in suppliers
join tb in TimeBands on s.fkTimeBandId equals tb.Id
where s.supplierId == supplierId
select new SupplierInfoModel
{
SupplierId = supplierId,
SupplierEmail = s.Email,
Phone = s.Phone,
Fax = s.Fax,
TimeBandDescription = tb.TimeBandDescription,
I have a working solution but not the prettiest.
join tb in TimeBands on s.fkTimeBandId equals tb.Id
from tband in timeband.DefaultIfEmpty()
var Results = (from s in suppliers
join tb in TimeBands on s.fkTimeBandId equals tb.Id
where s.supplierId == supplierId
select new
{
TimeBand = tband,
Supplier = new HotelInfoModel
{
SupplierId = supplierId,
SupplierEmail = s.Email,
Phone = s.Phone,
Fax = s.Fax,
//TimeBandDescription = tb.TimeBandDescription, // no longer needed
. . .
}
}).ToList();
foreach (var result in Results)
{
result.Supplier.TimeBandDescription = result.TimeBand?.TimeBandDescription ?? "No Time Band Desc";
}
var suppliers = Results.Select(s => s.Supplier).ToList();
I have this linq query:
var investorData = from investor in db.Investors
join investorLine in db.InvestorStatementLines
on investor.InvestorID equals investorLine.InvestorID
where investor.UserId == userId
select new InvestorViewModel()
{
InvestorId = investor.InvestorID,
InvestorName = investor.Name,
FundingDate = investor.FundingDate,
DueDate = investor.DueDate,
FundsCommitted = investor.FundsCommitted,
FundsInvested = investor.FundsInvested,
StatementLines =
db.InvestorStatementLines.Where(s => s.InvestorID == investor.InvestorID)
.Select(t => new InvestorStatementLineVM
{
Balance = t.Balance,
Credit = t.Credit,
Debit = t.Debit,
InvestorStatementLineDetails = t.Details,
Date = t.Date
}).ToList()
};
The viewmodel:
public class InvestorViewModel
{
public int InvestorId { get; set; }
public string InvestorName { get; set; }
public DateTime FundingDate { get; set; }
public DateTime? DueDate { get; set; }
public Decimal? FundsCommitted { get; set; }
public Decimal? FundsInvested { get; set; }
public List<InvestorStatementLineVM> StatementLines { get; set; }
}
What is happening is once I'm executing the query I'm getting 125 records, and that's the number of the StatementLines for that investor. So I'm getting 125 same records but I'm expecting one result which will have 125 statement lines in the inner list.
Is this query correct?
This is how you can do that with navigation properties
var investorData = from investor in db.Investors
where investor.UserId == userId
select new InvestorViewModel()
{
InvestorId = investor.InvestorID,
InvestorName = investor.Name,
FundingDate = investor.FundingDate,
DueDate = investor.DueDate,
FundsCommitted = investor.FundsCommitted,
FundsInvested = investor.FundsInvested,
StatementLines = investor.InvestorStatementLines
.Select(t => new InvestorStatementLineVM
{
Balance = t.Balance,
Credit = t.Credit,
Debit = t.Debit,
InvestorStatementLineDetails = t.Details,
Date = t.Date
}).ToList()
};
Use GroupJoin instead of Join: (_join x in y on x.a equals y.a
into z_)
var investorData = from investor in db.Investors
join investorLine in db.InvestorStatementLines
on investor.InvestorID equals investorLine.InvestorID
into investorLine
where investor.UserId == userId
select new InvestorViewModel()
{
InvestorId = investor.InvestorID,
InvestorName = investor.Name,
FundingDate = investor.FundingDate,
DueDate = investor.DueDate,
FundsCommitted = investor.FundsCommitted,
FundsInvested = investor.FundsInvested,
StatementLines = investorLine
.Select(t => new InvestorStatementLineVM
{
Balance = t.Balance,
Credit = t.Credit,
Debit = t.Debit,
InvestorStatementLineDetails = t.Details,
Date = t.Date
}).ToList()
};
Also instead of performing the sub-query just use the data from the join you just performed.
A better option, using entity framework, is using navigation properties and then you do not need to perform a join but you just have
InvestorStatementLines as a property of your investor.
To set the navigation properties:
public class InvestorViewModel
{
public int InvestorId { get; set; }
public string InvestorName { get; set; }
public DateTime FundingDate { get; set; }
public DateTime? DueDate { get; set; }
public Decimal? FundsCommitted { get; set; }
public Decimal? FundsInvested { get; set; }
public virtual ICollection<InvestorStatementLineVM> StatementLines { get; set; }
}
And the query will be as simple as:
var investorData = from investor in db.Investors
where investor.UserId == userId
select new InvestorViewModel()
{
InvestorId = investor.InvestorID,
....
StatementLines = investor.InvestorStatementLines.Select(....)
};
I created an EF Join. The frameStart has 19 records and frameEnd has 42 records, but when I do the join ( framing ), there are only 10 records. I believe there are only 10 records because it is joining records that can be grouped with the matching key. The code is below. How do I make it so that when it does the join, I get a list of all the records, even the ones that do not "match"?
public class s84_Report_FrameLabor
{
public int CustomerID { get; set; }
public string CustomerName { get; set; }
public int SubdivisionID { get; set; }
public string SubdivisionName { get; set; }
public int LotNumber { get; set; }
public string InstallManagerStart { get; set; }
public string InstallManagerComplete { get; set; }
public DateTime FrameLaborStart { get; set; }
public DateTime FrameLaborComplete { get; set; }
public int Duration { get; set; }
/*
Frame Labor Start ------ Product ID: 26
Frame Labor Complete ------ Product ID: 8
*/
public static List<s84_Report_FrameLabor> getDurationReport()
{
using (var context = PrimaryConnection.returnNewConnection())
{
var frameStart = (from c in context.s84_Schedule
where c.ProductID == 26 && c.Completed == false
select new
{
CustomerID = c.CustomerID,
CustomerName = c.s84_Customer.CustomerName,
SubdivisionID = c.SubdivisionID,
SubdivisionName = c.s84_Subdivision.SubdivisionName,
LotNumber = c.LotNumber,
FrameLaborStart = c.CustomerExpectedDate
}).ToList();
var frameEnd = (from c in context.s84_Schedule
where c.ProductID == 8 && c.Completed == false
select new
{
CustomerID = c.CustomerID,
SubdivisionID = c.SubdivisionID,
LotNumber = c.LotNumber,
FrameLaborComplete = c.CustomerExpectedDate
}).ToList();
var framing = from c in frameStart
join e in frameEnd on new { c.CustomerID, c.SubdivisionID, c.LotNumber } equals new { e.CustomerID, e.SubdivisionID, e.LotNumber }
select new s84_Report_FrameLabor
{
CustomerID = c.CustomerID,
CustomerName = c.CustomerName,
SubdivisionID = c.SubdivisionID,
SubdivisionName = c.SubdivisionName,
LotNumber = c.LotNumber,
FrameLaborStart = c.FrameLaborStart,
FrameLaborComplete = e.FrameLaborComplete,
Duration = (e.FrameLaborComplete - c.FrameLaborStart).Days
};
return framing.ToList();
}
}
}
Thanks to Andre, stuartd, and James R., I found out the solution was to use the EntityFramework DefaultIfEmpty().
var framing = from c in frameStart
join e in frameEnd on new { c.CustomerID, c.SubdivisionID, c.LotNumber } equals new { e.CustomerID, e.SubdivisionID, e.LotNumber } into jointable
from z in jointable.DefaultIfEmpty()
select new s84_Report_FrameLabor
{
CustomerID = c.CustomerID,
CustomerName = c.CustomerName,
SubdivisionID = c.SubdivisionID,
SubdivisionName = c.SubdivisionName,
LotNumber = c.LotNumber,
FrameLaborStart = c.FrameLaborStart,
FrameLaborComplete = z.FrameLaborComplete,
Duration = c.FrameLaborStart == null ? z.FrameLaborComplete == null ? (z.FrameLaborComplete - c.FrameLaborStart).Days : 0 : 0
};
return framing.ToList();
I am getting this error
Cannot implicitly convert type
System.Collections.Generic.List<AnonymousType#1> to
System.Collections.Generic.List<FirstApp.Model.TeamDetails>
What's wrong with my code?
Here is my code
TeamDetails Class
public class TeamDetails
{
[Key]
public int TeamId { get; set; }
public string TeamName { get; set; }
public string Description { get; set; }
public int? UserCount { get; set; }
}
ViewModel
public class ViewTeamList
{
public List<TeamDetails> TeamNext { get; set; }
}
Controller
public ActionResult Next(int dataid)
{
ViewTeamList viewTeamList = new ViewTeamList();
var a = from t in tDbContext.Teams
join u in tDbContext.Users on t.TeamId equals u.TeamId into g
where t.Deleted != true
select new { TeamId= t.TeamId,TeamName = t.TeamName, Description = t.Description, UserId = g.Count() };
var next = a.OrderBy(t1 => t1.TeamId).Where(t1 => t1.TeamId > dataid).FirstOrDefault();
viewTeamList.TeamNext = a.ToList();
return PartialView("_ViewTeamDetails", viewTeamList);
}
I'm not able to assign this value to
viewTeamList.TeamNext = a....;
This constructs an anonymous type instead of TeamDetails
select new { TeamId= t.TeamId,TeamName = t.TeamName, Description = t.Description, UserId = g.Count() }
You should change it to below
select new TeamDetails { TeamId = t.TeamId, TeamName = t.TeamName, Description = t.Description, UserCount = g.Count() }
so a.ToList() would be a List<FirstApp.Model.TeamDetails>