This is my method that returns IQueryable query. I want to generate serial no based on number of records.
public IQueryable<CompanyModel> GetCompanyData()
{
var query = (from e in Context.tblCompany
where e.Cmp_Id == this.CompanyId
&& e.TenantId == this.TenantId
select new CompanyModel()
{
CmpId = e.Cmp_Id,
SrNo = 0,
});
return query;
}
You can try below code may it help you
public IQueryable<CompanyModel> GetCompanyData()
{
List<CompanyModel> query = (from e in Context.tblCompany
where e.Cmp_Id == this.CompanyId
&& e.TenantId == this.TenantId
select new CompanyModel()
{
CmpId = e.Cmp_Id,
SrNo = 0,
}).ToList();
int counter=0;
query.Foreach(x=>x.SrNo = counter++);
return query;
}
As far as I am aware, the only way to have sequence number generated by the query itself is using "Select" method overload with 2 parameters, however it doesn't work with IQueryable, so your query will look like:
Context.tblCompany.Where(e => e.Cmp_Id == this.CompanyId && e.TenantId == this.TenantId)
.Select(e => new { CmpId = e.Cmp_Id })
.AsEnumerable()
.Select((e, i) => new CompanyModel { CmpId = e.CmpId, SrNo = i });
Obviously, this sequence number will be generated on the client and the resulting expression can't be treated as IQueryable anymore. At the same time, the part before "AsEnumerable" will be successfully translated into SQL.
Related
I want to concat multiple string value into single string with comma separated,i tried using aggregate function but it shows cannot convert string to how to fix this issue,
I tried below code
var res = (from e in WYNKContext.SurgeryAssigned.Where(x => x.CmpID == cmpid && x.IsCancelled == false)
select new
{
ID = e.SAID,
UIN = e.UIN,
SurgeryDate = e.SurgeryDate,
SurgeryID = e.SurgeryID,
Surgery = ((from st in WYNKContext.SurgeryTran.
Where(x => x.SurgeryID == e.SurgeryID)
select new
{
desc = icdmaster
.Where(x => x.ID ==
st.IcdSpecialityCode).Select(x =>
x.SpecialityDescription).FirstOrDefault(),
}).ToList()).Aggregate((a, b) => a.desc + "," + b.desc),
}).ToList();
I want Output like inside surgery property like = string1,string 2 ,etc....
without using aggregate i am getting as count in Surgery Property
var res = (from e in WYNKContext.SurgeryAssigned.Where(x => x.CmpID == cmpid && x.IsCancelled == false)
select new
{
ID = e.SAID,
UIN = e.UIN,
SurgeryDate = e.SurgeryDate,
SurgeryID = e.SurgeryID,
Surgery = (from st in WYNKContext.SurgeryTran.Where(x => x.SurgeryID == e.SurgeryID)
select new
{
icd = icdmaster.Where(x => x.ID == st.IcdSpecialityCode).Select(x => x.SpecialityDescription).FirstOrDefault(),
}).ToList(),
}).ToList();
also tried string join :
Surgery = string.Join(",", (from st in WYNKContext.SurgeryTran.Where(x => x.SurgeryID == e.SurgeryID)
select new
{
icd = icdmaster.Where(x => x.ID == st.IcdSpecialityCode).Select(x => x.SpecialityDescription).FirstOrDefault(),
}).ToList()),
but in output i am getting like this
Surgery ={ icd = CORNEA },{ icd = CATARACT/IOL }
can some one tell what i did wrong in string.join.....
The string class has a static method named Join, which takes in a collection of items and a string to join them with, which should work for you here.
If I'm reading your code correctly, it would look something like this:
Surgery = string.Join(",", WYNKContext.SurgeryTran
.Where(surgTran => surgTran.SurgeryID == e.SurgeryID)
.Select(surgTran => icdmaster
.Where(icd => icd.ID == surgTran.IcdSpecialityCode)
.Select(icd => icd.SpecialityDescription)
.FirstOrDefault())),
I want to build an advanced multiple parameters search for a website.
This is my DBML and ORM schema:
In this advanced multiple parameters search user can search through Estates with multiple parameters as like size, floor, city, price and so on.
This is the function that I coded to handle this part.
private DataTable linq_search_by_details()
{
myDBMLDataContext ctx = new myDBMLDataContext(address);
var query = ctx.Estates.AsQueryable();
query = query.Where(c => c.eshId == int.Parse(ddlEshape.SelectedValue.ToString()));
query = query.Where(c => c.cityId == int.Parse(ddlcity.SelectedValue.ToString()));
query = query.Where(c => c.ETId == int.Parse(ddlType.SelectedValue.ToString()));
query = query.Where(c => c.dealingId == int.Parse(ddldeal.SelectedValue.ToString()));
query = query.Where(c => c.deedId == int.Parse(ddldeed.SelectedValue.ToString()));
if (!string.IsNullOrEmpty(txtPrepaymentFrom.Value.Trim()))
{
query = query.Where(c => int.Parse(c.prepayment) <= int.Parse(txtPrepaymentFrom.Value));
}
if (!string.IsNullOrEmpty(txtPrepaymentTo.Value.Trim()))
{
query = query.Where(c => int.Parse(c.prepayment) >= int.Parse(txtPrepaymentTo.Value));
}
if (!string.IsNullOrEmpty(txtPrepaymentFrom.Value.Trim()) && !string.IsNullOrEmpty(txtPrepaymentTo.Value.Trim()))
{
query = query.Where(c => int.Parse(c.prepayment) <= int.Parse(txtPrepaymentFrom.Value) && int.Parse(c.prepayment) >= int.Parse(txtPrepaymentTo.Value));
}
if (!string.IsNullOrEmpty(txtPriceFrom.Value.Trim()))
{
query = query.Where(c => int.Parse(c.price) <= int.Parse(txtPriceFrom.Value));
}
if (!string.IsNullOrEmpty(txtPriceTo.Value.Trim()))
{
query = query.Where(c => int.Parse(c.price) >= int.Parse(txtPriceTo.Value));
}
if (!string.IsNullOrEmpty(txtPriceFrom.Value.Trim()) && !string.IsNullOrEmpty(txtPriceTo.Value.Trim()))
{
query = query.Where(c => int.Parse(c.price) <= int.Parse(txtPriceFrom.Value) && int.Parse(c.price) >= int.Parse(txtPriceTo.Value));
}
if (!string.IsNullOrEmpty(txtFloor.Value.Trim()))
{
query = query.Where(c => c.eFloor == short.Parse(txtFloor.Value));
}
if (chbExchange.Checked)
{
query = query.Where(c => c.exchange == true);
}
var final = query.Select(c => new { c.esId,c.owId, c.City.cityName, c.EstateShape.eshName, c.EstateType.ETName, c.owner.owFname, c.owner.owLname, c.esSize, c.prepayment, c.price });
return Special.LINQResultToDataTable(final.ToList());
}
This function works perfectly but now I want more to add some parameres from EstateEquipment and EstateFacility.
As you can see in ORM the relation between Estate and EstateEquipment (also Estate and EstateFacility) is one to many.
Now I want to user can search through Estate in cityId = 1, size around 400m which has for example eqId = 1 and 2 from EstateEquipment then which has for example fId = 1 and 2 from EstateFacility.
This is how I tried to handle last part.
foreach (ListItem item in cblEquipment.Items)
{
if (item.Selected)
{
eq = true;
}
}
if(eq)
{
var eqQuery = ctx.EstateEquipments.AsQueryable();
foreach (ListItem item in cblEquipment.Items)
{
if (item.Selected)
{
eqQuery = eqQuery.Where(c => c.eqId == int.Parse(item.Value.ToString()));
}
}
var eqFinal = eqQuery.Select(c => new { c.Estate.esId, c.Estate.owner.owId, c.Estate.City.cityName, c.Estate.EstateShape.eshName, c.Estate.EstateType.ETName, c.Estate.owner.owFname, c.Estate.owner.owLname, c.Estate.esSize, c.Estate.prepayment, c.Estate.price });
DataTable dtEq = Special.LINQResultToDataTable(eqFinal.ToList());
if(dtEq.Rows.Count>0)
{
this.Build_search(dtEq);
}
else
{
msg = "No record found";
sysMsg.Attributes["class"] = "";
sysMsg.Attributes["class"] = "alert alert-warning";
}
}
Here, First I check which equipment is selected from the list. Then extended the query accordance with Items selected. But I don't know how to join this new result with last result and even EstateFacility result.
Thanks for any help.
Without being able to test my solution because of your rather complex case, I hope it at least puts you in the right direction.
I'd say try something like this:
if (cblEquipment.Items.Any(item => item.Selected))
{
var selectedEquipmentIds = cblEquipment.Items.Where(item => item.Selected).Select(item => int.Parse(item.Value.ToString()));
query = query.Where(c => ctx.EstateEquipments.Any(eq => eq.esId == c.esId && selectedEquipmentIds.Contains(eq.eqId)));
}
This goes in your first code snippet just before var final .... Second snippet will then not be used and therefore your error handling over there will also need to move...
I am having problems with subqueries in a linq-to-entities IQueryable query.
Can anybody tell me what is the correct way to do a sub query when building up an IQueryable query? Based on my full example below.
I get the following error when ToArray() is called on the query:
An exception of type 'System.NotSupportedException' occurred in System.Data.Entity.dll but was not handled in user code
Additional information: LINQ to Entities does not recognize the method 'System.Data.Entity.IDbSet`1[MyDomain.NewsWorthyPressReleases.NewsWorthyWire] Set[NewsWorthyWire]()' method,
and this method cannot be translated into a store expression.
So for example you can see one of my subqueries here:
BwIncluded = (from abw in Context.Set<NewsWorthyWire>()
where abw.WireId == PressWireIds.BUID
where abw.NewsWorthyCampaignId == nc.Id
select abw).Any(),
I am trying to populate BwIncluded with true or false if any() exists.
And the entire build up of the query is as follows, it is IMPORTANT to understand where the sub-queries are used:
private Func<EntityFramework.IDbContext, IQueryable<NewsWorthyPressRelease>> GetSearchNewsWorthyQuery(NewsWorthySearchFields searchFields)
{
return context =>
{
//domain models
var newsWorthyCampaigns = context.Set<NewsWorthyCampaign>();
var wires = context.Set<NewsWorthyWire>();
var campaigns = context.Set<Campaign>();
//predicates
var newsWorthyCampaignPredicate = PredicateBuilder.True<NewsWorthyCampaign>();
var wirePredicate = PredicateBuilder.True<NewsWorthyWire>();
var campaignPredicate = PredicateBuilder.True<Campaign>();
// build up the predicate queries
//Status was input
if (searchFields.StatusId.HasValue && searchFields.StatusId.Value > 0)
{
newsWorthyCampaignPredicate = newsWorthyCampaignPredicate.And(x => x.Id == searchFields.StatusId);
}
//Id was input
if (searchFields.Id.HasValue && searchFields.Id.Value > 0)
{
wirePredicate = wirePredicate.And(x => x.Id == searchFields.Id);
}
//Title was input
if (!string.IsNullOrEmpty(searchFields.Title))
{
wirePredicate = wirePredicate.And(x => x.Title.Contains(searchFields.Title));
}
//Wire was input
if (searchFields.PressWireId.HasValue && searchFields.PressWireId.Value > 0)
{
wirePredicate = wirePredicate.And(x => x.Id == searchFields.PressWireId);
}
//Created By was chosen
if (searchFields.CreatedById.HasValue && searchFields.CreatedById.Value > 0)
{
campaignPredicate = campaignPredicate.And(x => x.IdentityId == searchFields.CreatedById);
}
//Create Date From was chosen
if (searchFields.DateCreatedFrom.HasValue)
{
campaignPredicate = campaignPredicate.And(y => y.CreationDate >= searchFields.DateCreatedFrom);
}
//Create Date To was chosen
if (searchFields.DateCreatedTo.HasValue)
{
campaignPredicate = campaignPredicate.And(y => y.CreationDate <= searchFields.DateCreatedTo);
}
//the query
var nwprQuery = (from nc in newsWorthyCampaigns.Where(newsWorthyCampaignPredicate)
join w in wires.Where(wirePredicate)
on nc.Id equals w.NewsWorthyCampaignId
join c in campaigns.Where(campaignPredicate)
on nc.CampaignId equals c.Id
select new NewsWorthyPressRelease
{
Id = nc.Id,
Title = w.Title,
//BwIncluded = false,
//GnIncluded = false,
//PrIncluded = false,
BwIncluded = (from abw in Context.Set<NewsWorthyWire>()
where abw.WireId == PressWireIds.BUID
where abw.NewsWorthyCampaignId == nc.Id
select abw).Any(),
GnIncluded = (from agw in Context.Set<NewsWorthyWire>()
where agw.WireId == PressWireIds.GLID
where agw.NewsWorthyCampaignId == nc.Id
select agw).Any(),
PrIncluded = (from anw in Context.Set<NewsWorthyWire>()
where anw.WireId == PressWireIds.PRID
where anw.NewsWorthyCampaignId == nc.Id
select anw).Any(),
CreatedBy = c.CreatedBy.FirstName + " " + c.CreatedBy.Surname,
CreateDate = c.CreationDate,
Status = nc.NewsWorthyStatus.Name,
}).AsNoTracking();
return nwprQuery;
};
}
Can anyone help with this?
Thanks
This is my Code where I am fetching data.
var list = (from u in _dbContext.Users
where u.IsActive
&& u.IsVisible
&& u.IsPuller.HasValue
&& u.IsPuller.Value
select new PartsPullerUsers
{
AvatarCroppedAbsolutePath = u.AvatarCroppedAbsolutePath,
Bio = u.Bio,
CreateDateTime = u.CreationDate,
Id = u.Id,
ModifieDateTime = u.LastModificationDate,
ReviewCount = u.ReviewsReceived.Count(review => review.IsActive && review.IsVisible),
UserName = u.UserName,
Locations = (from ul in _dbContext.UserLocationRelationships
join l in _dbContext.Locations on ul.LocationId equals l.Id
where ul.IsActive && ul.UserId == u.Id
select new PartsPullerLocation
{
LocationId = ul.LocationId,
Name = ul.Location.Name
}),
Rating = u.GetPullerRating()
});
Now Here is my Extension.
public static int GetPullerRating(this User source)
{
var reviewCount = source.ReviewsReceived.Count(r => r.IsActive && r.IsVisible);
if (reviewCount == 0)
return 0;
var totalSum = source.ReviewsReceived.Where(r => r.IsActive && r.IsVisible).Sum(r => r.Rating);
var averageRating = totalSum / reviewCount;
return averageRating;
}
I have check this Post LINQ to Entities does not recognize the method
And I come to know I need to use
public System.Linq.Expressions.Expression<Func<Row52.Data.Entities.User, int>> GetPullerRatingtest
But how ?
Thanks
You can use conditionals inside LINQ to Entity queries:
AverageRating = u.ReviewsReceived.Count(r => r.IsActive && r.IsVisible) > 0 ?
u.ReviewsReceived.Where(r => r.IsActive && r.IsVisible).Sum(r => r.Rating) /
u.ReviewsReceived.Count(r => r.IsActive && r.IsVisible)
: 0
This will be calculated by the server, and returned as part of your list. Although with 10 million rows like you said, I would do some serious filtering before executing this.
Code within LINQ (to Entities) query is executed within database, so you can't put random C# code there. So you should either use user.GetPullerRating() after it is retrieved or create a property if you don't want to do the calculation every time.
You can also do:
foreach (var u in list)
u.Rating = u.GetPullerRating()
By the way, why is it extension method.
I have Table HR_Travel(TravelID, TravelCode....) and HR_TravelDocuments(TravelDocID, TravelID, DocUrl)
FromDate = FromDate.AddDays(1);
ToDate = ToDate.AddDays(1);
List<dynamic> Lst = new List<dynamic>();
var queryTravelDetails = from t in db.HR_TravelDetails
where ((t.StatusDate >= FromDate && t.StatusDate <= ToDate)
&& (t.EmpID == EmpID || EmpID == 0) && (t.TravelStatus == TravelStatus || TravelStatus == "All"))
orderby t.StatusDate descending
select new
{
TravelID = t.TravelID,
TravelSubID = db.HR_TravelDetails.Where(i => i.TravelID == 0).FirstOrDefault().TravelID == null ? 0 : db.HR_TravelDetails.Where(i => i.TravelID == 0).FirstOrDefault().TravelID,
t.TravelCode,
t.EmpID,
EmpName = db.EE_Employee.Where(i => i.EmpID == t.EmpID).FirstOrDefault().EmpName,
t.CellNo,
t.BoardingForm,
t.DestinationTO,
t.JournyDate,
t.Purpose,
t.Organization,
t.TravelStatus,
DocUrl = DocUrl = string.Join(",",( db.HR_TravelDocuments.Where(i => i.TravelID == t.TravelID && i.TravelSubID == 0).Select(i => i.DocUrl).ToList()))
};
foreach (var element in queryTravelDetails)
{
Lst.Add(element);
}
Gives the following error:
LINQ to Entities does not recognize the method 'System.String Join[String](System.String, System.Collections.Generic.IEnumerable`1[System.String])' method, and this method cannot be translated into a store expression.
The Join() method can't be used in LINQ expressions, because it cannot translate from CLR to T-SQL. Another example is that you can't use:
var itemCount = db.Table.Count(p => p.Something == SomeFunction(someVariable));
You should move the method call outside the LINQ statement:
var anotherVariable = SomeFunction(someVariable);
var itemCount = db.Table.Count(p => p.Something == anotherVariable);
I hope I explained in a good way.
EDIT: As seen in the comments before, you can also use ToArray() and when the data is loaded locally you can use functions in statements freely.