i have this query and i wanna to change to linq query methods:
select o.OrderID,o.OrderNo, o.OrderDate, SUM(TotalAmount) Total
from orders o inner join
OrderDetails e on o.OrderID=e.OrderID
group by o.OrderNo, o.OrderDate,o.OrderID order by o.OrderNo desc
i have been trying the follow:
public List<Orders>List()
{
var list = new List<Orders>();
try
{
using (var db = new MyDatabaseEntities())
{
list = db.Orders.Select(o => new { o.OrderID, o.OrderNo, o.OrderDate, o.OrderDetails.TotalAmount}).
GroupBy(x => new { x.OrderID, x.OrderNo, x.OrderDate }).
Select(o => new
{
o.Key,
id = o.OrderID,
order = o.NumOrder,
date = o.OrderDate,
Total = o.Sum(o.TotalAmount)
}).Tolist();
}
}
catch(Exception e)
{
throw new Exception(e.Message);
}
return list;
}
Someone can Help me?
I think try this:
var list=db.Orders.Join(OrderDetails,
o=>o.OrderID
e=>e.OrderID
(o,e)=>new{Orders=o,OrderDetails=e})
.GroupBy(o=>new {o.OrderNo, o.OrderDate,o.OrderID})
.OrderBy(x=>x.Key.OrderNo)
.Select(o=>new{
o.Key.OrderID,
o.Key.OrderNo,
o.Key.OrderDate,
Total=o.SUM(x=>x.TotalAmount)})
.ToList();
Try this :
Sql like syntax
from t in TblOrders
join d in TblOrderDetails
on t.Id equals d.OrderId
group d by new {t.Id, t.OrderNo, t.OrderDate} into g
orderby g.Key.OrderNo descending
select new
{
ID = g.Key.Id,
OrderNo = g.Key.OrderNo,
OrderDate = g.Key.OrderDate,
amount = g.Sum(x=>x.Rate)
}
lambda like:
TblOrders
.Join (
TblOrderDetails,
t => t.Id,
d => d.OrderId,
(t, d) =>
new
{
t = t,
d = d
}
)
.GroupBy (
temp0 =>
new
{
Id = temp0.t.Id,
OrderNo = temp0.t.OrderNo,
OrderDate = temp0.t.OrderDate
},
temp0 => temp0.d
)
.OrderByDescending (g => g.Key.OrderNo)
.Select (
g =>
new
{
ID = g.Key.Id,
OrderNo = g.Key.OrderNo,
OrderDate = g.Key.OrderDate,
amount = g.Sum (x => x.Rate)
}
)
Related
I've been searching for a while now. But all the solutions seems to be different than what I expect.
So this is my query in SQL:-
Select * from
(
select Name,Description Descr from CourseTbl
union all
select MainDesc Name,MainDesc Descr from CoursedescTbl
union all
select SubHeading Name,SubDesc Descr from CourseSubDesc
union all
select Name,Descr as Descr from InternTbl
)A where A.Name like '%D%' or A.Descr like '%D%'
I want to execute the above query using LINQ or EF. and return the list in Json format. So I tried many failed attempts and this is one of them:-
public JsonResult SearchDetail()
{
string SearchKey = Request.Form["SearchName"].ToString();
IEnumerable<SearchList> QueryResult;
using (EBContext db = new EBContext())
{
try
{
QueryResult =
(from x in db.Courses
select new { A = x.Name, B = x.Description })
.Concat(from y in db.CourseDesc
select new { A = y.MainHeading, B = y.MainDesc })
.Concat(from z in db.CourseSubDesc
select new { A = z.SubDesc, B = z.SubHeading })
.Concat(from w in db.Interns
select new { A = w.Name, B = w.Descr })
.ToList();
}
catch (Exception ex)
{
return new JsonResult
{
Data = ex.Message,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
return new JsonResult
{
Data = QueryResult,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
}
And my SearchList Class is like this:-
public class SearchList
{
public string Name { get; set; }
public string Descr { get; set; }
}
I'm not able to put the where clause in linq query which will search in all table.
I'm getting error when I assign queryresult to my ef query. It says cannot cast to Innumerable.
Thanks in Advance.
Could you explain more on the error you are getting?
Also, have you tried using .Union() in linq?
QueryResult = db.Courses.Select(x=> new { A = x.Name, B= x.Description})
.Union(db.CourseDesc.Select(y=> new {A = y.MainHeading, B = y.MainDesc })
.Union( //so on
.ToList(); //this isn't necessary
Edit: There are two ways to input where clause, either with each search, or at the end:
QueryResult = db.Courses.Where(x=>x.Name == "Name").Select(x=> new { A = x.Name, B= x.Description})
.Union(db.CourseDesc.Where(y=>y.MainHeading == "Name").Select(y=> new {A = y.MainHeading, B = y.MainDesc })
.Union( //so on
.ToList();
Or:
QueryResult = db.Courses.Where(x=>x.Name == "Name").Select(x=> new { A = x.Name, B= x.Description})
.Union(db.CourseDesc.Where(y=>y.MainHeading == "Name").Select(y=> new {A = y.MainHeading, B = y.MainDesc })
.Union( //so on
//Where can go either before or after .ToList
.Where(item=>item.A == "Name")
.ToList();
You did not say what error/exception you are getting. But your QueryResult is of type IEnumerable<SearchList> and you appear to be assigning it an enumerable of anonymous type { A, B }.
Try this:
QueryResult = (from x in db.Courses
select new SearchList { Name = x.Name, Descr = x.Description })
.Concat(...)
.ToList();
Or
QueryResult = db.Courses.Select(x => new SearchList
{ Name = x.Name, Descr = x.Description})
.Concat(...)
.ToList();
UPDATE
Your #2 issue will be fixed if you changed your select to new up a SearchList as I did above, instead of new-ing an anonymous type.
As for your issue #1, you should insert the Where() before your Select():
result1 = db.Courses
.Where(x => x.Name.Contains('D') || x.Description.Contains('D'))
.Select(x => new SearchList { Name = x.Name, Descr = x.Description});
result2 = db.CourseDesc
.Where(y => y.MainHeading.Contains('D') || y.MainDesc.Contains('D'))
.Select(y => new SearchList { Name = y.MainHeading, Descr = y.MainDesc});
result3 = db.CourseSubDesc
.Where(...)
.Select(...);
QueryResult = result1.Concat(result2).Concat(result3).ToList();
Doing Where() as part of the query on each table is important so you do not fetch all records from that table, unlike if you do the Where() after Concat(). Also note that Concat() may throw an ArgumentNullException.
Take the lists Separately and query and concat
check this example
List<string> a = new List<string>() { "a", "b", "c" };
List<string> b = new List<string>() { "ab", "bb", "cb" };
IEnumerable<SearchList> QueryResult =
a.Where(x => x.Contains("a")).Select(x => new SearchList() { Name = x, Descr = x })
.Concat(b.Where(x => x.Contains("a")).Select(x => new SearchList() { Name = x, Descr = x }));
I have a problem in group by with link to sql
first I have this tables :
client : Id_client , nom , prenom , villeId
ville: id_ville , nom
Code:
justiceDataContext dbContext = new justiceDataContext();
GridView1.DataSource = from client in dbContext.Client
join ville in dbContext.Commande
on client.villeId equals ville.Id_ville
group client by ville.nom into g
select new { City = g.Key, NumberOfClients = g.Count() };
GridView1.DataBind();
My objective is to get number of client by city (ville)
thank you
dbContext.Client
.GroupBy(c => c.villeId)
.Select(g => new {
CityName = dbContext.Villes.Where(v => v.Id_ville == g.Key),
NumberOfClient = g.Count()
}).ToList();
Another approach:
var result = dbContext.Villes
.Join(dbContextClients, v => v.IdVille, c => c.IdVille, (v, c) => new { client = c, ville = v })
.GroupBy(j => j.ville.IdVille)
.Select(g => new {
VilleName = g.First().ville.Name,
NumberOfClients = g.Count()
}).ToList();
Actually I want to return the data from different lists based on Date. When i'm using this i'm getting data upto #Var result but i'm unnable to return the data. The issue with this is i'm getting error #return result. I want to return the data #return result. I'm using Linq C#. Can anyone help me out?
public List<CustomerWiseMonthlySalesReportDetails> GetAllCustomerWiseMonthlySalesReportCustomer()
{
var cbsalesreeport = (from cb in db.cashbilldescriptions
join c in db.cashbills on cb.CashbillId equals c.CashbillId
join p in db.products on cb.ProductId equals p.ProductId
select new
{
Productamount = cb.Productamount,
ProductName = p.ProductDescription,
CashbillDate = c.Date
}).AsEnumerable().Select(x => new ASZ.AmoghGases.Model.CustomerWiseMonthlySalesReportDetails
{
Productdescription = x.ProductName,
Alldates = x.CashbillDate,
TotalAmount = x.Productamount
}).ToList();
var invsalesreeport = (from inv in db.invoices
join invd in db.invoicedeliverychallans on inv.InvoiceId equals invd.InvoiceId
select new
{
Productamount = invd.Total,
ProductName = invd.Productdescription,
InvoiceDate = inv.Date
}).AsEnumerable().Select(x => new ASZ.AmoghGases.Model.CustomerWiseMonthlySalesReportDetails
{
Productdescription = x.ProductName,
Alldates = x.InvoiceDate,
TotalAmount = x.Productamount
}).ToList();
var abc = cbsalesreeport.Union(invsalesreeport).ToList();
var result = (from i in abc
group i by new { Date = i.Alldates.ToString("MMM"), Product = i.Productdescription } into grp
select new { Month = grp.Key, Total = grp.Sum(i => i.TotalAmount) });
**return result;**
}
You can either convert your result to a List before returning it using return result.ToList() or make your method return an IEnumerable<CustomerWiseMonthlySalesReportDetails> instead of List.
As your result is an enumeration of anonymous types you have to convert them to your CustomerWiseMonthlySalesReportDetails-type first:
select new CustomerWiseMonthlySalesReportDetails{ Month = grp.Key, Total = grp.Sum(i => i.TotalAmount) });
Assuming your type has exactly the members returned by the select.
EDIT: So your code should look like this:
var result = (from i in abc
group i by new { Date = i.Alldates.ToString("MMM"), Product = i.Productdescription } into grp
select new CustomerWiseMonthlySalesReportDetails{ Month = grp.Key, Total = grp.Sum(i => i.TotalAmount) });
return result.ToList();
You can assume Alldates property if is date of one of groups that month of date is in right place:
var result = (from i in abc
group i by new { Date = i.Alldates.ToString("MMM"), Product = i.Productdescription }
into grp
select new CustomerWiseMonthlySalesReportDetails{
Productdescription = grp.Key.Product,
TotalAmount = grp.Sum(i => i.TotalAmount),
Alldates =grp.First(i=>i.Alldates ) })
.ToList();
I have an EF query that contains a number of aggregate sub queries (Count, Sum and Max). There are two problems.
I need the joins on the sub queries to be left joins so that records are returned even if there are no results in the aggregate sub queries. At present, records are only returned if all sub queries return records.
The resulting list of WholesaleCustomerAndAggregateOrders objects that are returned contain a Contact object that needs to also include Addresses and Counties. I added Include(c => c.Addresses.Select(a => a.Country)) to the query but the Contact objects don't contain any Address objects.
Any assistance with either issue would be appreciated. Full query below.
var month1Date = DateTime.Today.AddMonths(-1);
var month3Date = DateTime.Today.AddMonths(-3);
var month6Date = DateTime.Today.AddMonths(-6);
var month12Date = DateTime.Today.AddMonths(-12);
var db = GetNewContext();
var qry = from c in db.Contacts
.Include(c => c.Addresses.Select(a => a.Country))
join orderCount in
(
from o in db.WholesaleOrders
group o by o.ContactId into g
select new
{
ContactId = g.Key,
TotalOrders = g.Count()
}
) on c.Id equals orderCount.ContactId
join month1Value in
(
from o in db.WholesaleOrders
where o.OrderDate >= month1Date
group o by o.ContactId into g
select new
{
ContactId = g.Key,
TotalValue = g.Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price))
}
) on c.Id equals month1Value.ContactId
join month3Value in
(
from o in db.WholesaleOrders
where o.OrderDate >= month3Date
group o by o.ContactId into g
select new
{
ContactId = g.Key,
TotalValue = g.Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price))
}
) on c.Id equals month3Value.ContactId
join month6Value in
(
from o in db.WholesaleOrders
where o.OrderDate >= month6Date
group o by o.ContactId into g
select new
{
ContactId = g.Key,
TotalValue = g.Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price))
}
) on c.Id equals month6Value.ContactId
join month12Value in
(
from o in db.WholesaleOrders
where o.OrderDate >= month12Date
group o by o.ContactId into g
select new
{
ContactId = g.Key,
TotalValue = g.Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price))
}
) on c.Id equals month12Value.ContactId
join month12Quantity in
(
from o in db.WholesaleOrders
where o.OrderDate >= month12Date
group o by o.ContactId into g
select new
{
ContactId = g.Key,
OrderCount = g.Count()
}
) on c.Id equals month12Quantity.ContactId
join lastOrderDate in
(
from o in db.WholesaleOrders
group o by o.ContactId into g
select new
{
ContactId = g.Key,
LastOrderDate = g.Max(r => r.OrderDate)
}
) on c.Id equals lastOrderDate.ContactId
select new WholesaleCustomerAndAggregateOrders
{
Contact = c,
TotalOrders = orderCount.TotalOrders,
Month1Value = month1Value.TotalValue,
Month3Value = month3Value.TotalValue,
Month6Value = month6Value.TotalValue,
Month12Value = month12Value.TotalValue,
Month12OrderCount = month12Quantity.OrderCount,
LastOrderDate = lastOrderDate.LastOrderDate
};
return await qry.ToListAsync();
How about this:
db.WholesaleOrders
.GroupBy(o => o.ContactId)
.Select(a => new {
a.Key,
TotalOrders = a.Count(),
LastOrderDate = a.Max(r => r.OrderDate),
Month1Value = a.Where(b => b.OrderDate >= month1Date).Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price),
Month3Value = a.Where(b => b.OrderDate >= month3Date).Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price),
Month6Value = a.Where(b => b.OrderDate >= month6Date).Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price),
Month12Value = a.Where(b => b.OrderDate >= month12Date).Sum(r => r.LineItems.Sum(l => l.QuantityOrdered * l.Price)
}).ToListAsync();
UPDATE: Add another property to projection:
Addresses = db.Addresses.Where(ad => ad.ContactId == a.Key);
where db is your context, and ad.ContactId is FK of the contact in Address table.
For this to work, multipleactiveresultsets property of the connection must be set to True.
How do I change this query to an outer join so that customers with no orders still appear in the results?
Customers
.Join(
Orders,
c => c.ID,
r => r.ID,
(c, r) =>
new
{
Name = c.Name,
Address = c.Address,
OrderNumber = r.OrderNumber,
OrderDetails = r.OrderDetails
}
).ToList()
from c in context.Customers
join o in context.order on new { cid = c.cid } equals new { cid = o.cid } into ljoin
from l in ljoin.DefaultIfEmpty()
select new()
{
//whatever
};