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The specified LINQ expression contains references to queries that are associated with different contexts c#

I have this simple function that returns a query, but when I try to join 2 tables in different databases, the error raised: The specified LINQ expression contains references to queries that are associated with different contexts.
here is my code.
private object projectcycleFilter(int? pid, int? cid, int UserId)
{
string[] res = { null, "" };
int?[] resint = { null, 0 };
var access_user = (from p in geotagging.webpages_UsersInRoles join s in geotagging.UserProfiles on p.UserId equals s.UserId where p.UserId == UserId select p).ToList();
var x = new object();
var geotaggingquery = (from xx in geotagging.sub_project select xx).AsEnumerable();
var nfmsquery = (from p in nfmsdb.request_for_refund join lr in nfmsdb.lib_regions on p.region_code equals lr.region_code join lp in nfmsdb.lib_provinces on p.prov_code equals lp.prov_code join lc in nfmsdb.lib_cities on p.city_code equals lc.city_code join lb in nfmsdb.lib_brgy on p.brgy_code equals lb.brgy_code join gts in geotaggingquery on p.sub_project_id equals gts.sub_project_id select new { lb, lc, lp, lr, p, gts }).AsEnumerable();
if (access_user.Select(x => x.RoleId).FirstOrDefault() > 2)
{
nfmsquery = (from p in nfmsdb.request_for_refund join lr in nfmsdb.lib_regions on p.region_code equals lr.region_code join lp in nfmsdb.lib_provinces on p.prov_code equals lp.prov_code join lc in nfmsdb.lib_cities on p.city_code equals lc.city_code join lb in nfmsdb.lib_brgy on p.brgy_code equals lb.brgy_code join gt in nfmsdb.user_municipal_access on p.city_code equals gt.city_code join gts in geotaggingquery on p.sub_project_id equals gts.sub_project_id where gt.user_id == UserId && gt.selected == true select new { lb, lc, lp, lr, p, gts }).AsEnumerable();
}
if (!resint.Contains(pid))
{
nfmsquery = nfmsquery.Where(x => x.gts.project_type_id == pid);
}
if (!resint.Contains(cid))
{
nfmsquery = nfmsquery.Where(x => x.gts.cycle_id == cid);
}
var result = nfmsquery.Select(x => new
{
sub_project_id = x.p.sub_project_id,
sub_project_name = x.p.sub_project_name,
region_name = x.lr.region_name,
region_code = x.lr.region_code,
prov_name = x.lp.prov_name,
prov_code = x.lp.prov_code,
city_name = x.lc.city_name,
city_code = x.lc.city_code,
brgy_code = x.lb.brgy_code,
brgy_name = x.lb.brgy_name,
request_for_refund_id = x.p.request_for_refund_id,
total_sub_project_cost = x.p.total_sub_project_cost,
total_program_cost = x.p.total_program_cost,
region_director = x.p.region_director,
lbp_branch = x.p.lbp_branch,
address = x.p.address,
lcc_amount = x.p.lcc_amount,
account_name = x.p.account_name,
bank_no = x.p.bank_no,
amount_requested = x.p.amount_requested,
tranche_id = x.p.tranche_id,
prev_amount_release = x.p.prev_amount_release,
cumul_total_request = x.p.cumul_total_request,
date_created = x.p.date_created,
date_requested = x.p.date_requested,
brgy_chair_name = x.p.brgy_chair_name,
bspmc_name = x.p.bspmc_name,
ac_name = x.p.ac_name,
lprao_name = x.p.lprao_name,
lprao_date = x.p.lprao_date,
rpc_name = x.p.rpc_name,
rpm_name = x.p.rpm_name,
ac_date = x.p.ac_date,
rpc_date = x.p.rpc_date,
rpm_date = x.p.rpm_date,
updated_by = x.p.updated_by,
date_updated = x.p.date_updated,
isdeleted = x.p.isdeleted,
}).ToList();
return result;
}
I also try var geotaggingquery = (from xx in geotagging.sub_project select xx).ToList() and `var nfmsquery = (from p in nfmsdb.request_for_refund join lr in nfmsdb.lib_regions on p.region_code equals lr.region_code join lp in nfmsdb.lib_provinces on p.prov_code equals lp.prov_code join lc in nfmsdb.lib_cities on p.city_code equals lc.city_code join lb in nfmsdb.lib_brgy on p.brgy_code equals lb.brgy_code join gts in geotaggingquery on p.sub_project_id equals gts.sub_project_id select new { lb, lc, lp, lr, p, gts }).ToList();, nothing happens.
Thanks in advance

How to add a '.Contains()' to the where clause of a query?

I have this query but I need to add a where clause that uses 'Contains()' so I can check the db for a list of accountIDs, the reason I need to do it this way is because I have to first check if there are any accountID's and if there are it must execute the 'Contains()' in the where clause but the compiler complains if I try do it this way but given what the method has to do I can't figure out another way to do it given the fact that there are so many tables joined in the query.
My code:
bool UseAcc = false;
if (accountIds != null && accountIds.Count > 0)
{
UseAcc = true;
}
var query = (from i in db.Incidents
join s in db.Sites on i.SiteID equals s.SiteID
join a in db.Accounts on i.AccountID equals a.AccountID
join st in db.Status on i.StatusID equals st.StatusID
join currentUser in db.Users on i.CurrentAssignedUser equals currentUser.UserID
join loggedByUser in db.Users on i.LoggedByUser equals loggedByUser.UserID
join createdByUser in db.Users on i.CreatedByUser equals createdByUser.UserID
join l in db.Locations on i.Location equals l.LocationID into locList
from loc in locList.DefaultIfEmpty()
join q in db.QuestionCategories on i.QuestionCategoryID equals q.QuestionCategoryID
join ia in db.IncidentActions on i.IncidentID equals ia.IncidentID into iaList
from actions in iaList.DefaultIfEmpty()
//If 'UseAcc' gets set to true then execute the contains section of the or statement
where (i.Active == true) &&
(UseAcc = false || a => accountIds.Contains(a.AccountID))
select new
{
Title = i.Title,
IncidentID = i.IncidentID,
StatusName = st.StatusName,
StatusID = i.StatusID,
ReferenceNumber = i.ReferenceNo,
AccountName = a.AccountName,
AccountID = i.AccountID,
SiteName = s.SiteName,
SiteID = i.SiteID,
LocationName = loc.LocationName,
LocationID = i.Location,
CatName = q.QuestionCategoryName,
CatID = i.QuestionCategoryID,
CurrentAssignedUser = currentUser.FirstName + " " + currentUser.LastName,
AssignedUserID = i.CurrentAssignedUser,
CreatedByUser = createdByUser.FirstName + " " + createdByUser.LastName,
DateCreated = i.LoggedDate,
DepartmentID = i.DepartmentID,
Logger = loggedByUser.FirstName + " " + loggedByUser.LastName,
LoggedBy = i.LoggedByUser,
EscalationCount = i.EscalationCount)
});
I would paste the whole method but its really big.
I have looked at examples online but they can't work either because alot of them use an AsQueryable with a single table and this query has many tables joined.
Please Help.

var accounts = db.Accounts.AsQueryable();
if (accountIds != null && accountIds.Count > 0)
{
accounts = accounts.Where(a => accountIds.Contains(a.AccountID));
}
var query = (from i in db.Incidents
join s in db.Sites on i.SiteID equals s.SiteID
join a in accounts on i.AccountID equals a.AccountID
join st in db.Status on i.StatusID equals st.StatusID
join currentUser in db.Users on i.CurrentAssignedUser equals currentUser.UserID
join loggedByUser in db.Users on i.LoggedByUser equals loggedByUser.UserID
join createdByUser in db.Users on i.CreatedByUser equals createdByUser.UserID
join l in db.Locations on i.Location equals l.LocationID into locList
from loc in locList.DefaultIfEmpty()
join q in db.QuestionCategories on i.QuestionCategoryID equals q.QuestionCategoryID
join ia in db.IncidentActions on i.IncidentID equals ia.IncidentID into iaList
from actions in iaList.DefaultIfEmpty()
select new
{
Title = i.Title,
IncidentID = i.IncidentID,
StatusName = st.StatusName,
StatusID = i.StatusID,
ReferenceNumber = i.ReferenceNo,
AccountName = a.AccountName,
AccountID = i.AccountID,
SiteName = s.SiteName,
SiteID = i.SiteID,
LocationName = loc.LocationName,
LocationID = i.Location,
CatName = q.QuestionCategoryName,
CatID = i.QuestionCategoryID,
CurrentAssignedUser = currentUser.FirstName + " " + currentUser.LastName,
AssignedUserID = i.CurrentAssignedUser,
CreatedByUser = createdByUser.FirstName + " " + createdByUser.LastName,
DateCreated = i.LoggedDate,
DepartmentID = i.DepartmentID,
Logger = loggedByUser.FirstName + " " + loggedByUser.LastName,
LoggedBy = i.LoggedByUser,
EscalationCount = i.EscalationCount)
});

Linq To Sql Skip Take

I want to save each icon path into a variable, from the query bellow , only PathIcon1 has value . The remain path icon are empty
Query
using (CarteringServiceClientDataContext dc = new CarteringServiceClientDataContext())
{
result = (from a in dc.GetTable<tblSupplier>()
join b in dc.GetTable<tblCity>()
on a.CityId equals b.Id
join c in dc.GetTable<tblZone>()
on b.ZoneId equals c.Id
let r = (from re in dc.GetTable<tblClientReview>()
where re.SupplierId == a.Id
select re.note).Average()
let i = (from im in dc.GetTable<tblSupplierItem>()
where im.SupplierId == a.Id
select im.tblItem.IconPath).ToArray()
select new SearchResult
{
CompanyId = a.Id,
CompanyName = a.Company,
Localisation = a.Locality,
City = b.Name,
Zone = c.Name,
Rating = r.ToString(),
PathIcon1 = i.Take(1).SingleOrDefault(),
PathIcon2 = i.Skip(1).Take(1).SingleOrDefault(),
PathIcon3 = i.Skip(2).Take(1).SingleOrDefault(),
PathIcon4 = i.Skip(3).Take(1).SingleOrDefault(),
PathIcon5 = i.Skip(4).Take(1).SingleOrDefault()
}).ToList<SearchResult>();
}
A part from PathIcon1, the remaing PathIcon are null

using (CarteringServiceClientDataContext dc = new CarteringServiceClientDataContext())
{
result = (from a in dc.GetTable<tblSupplier>()
join b in dc.GetTable<tblCity>()
on a.CityId equals b.Id
join c in dc.GetTable<tblZone>()
on b.ZoneId equals c.Id
let r = (from re in dc.GetTable<tblClientReview>()
where re.SupplierId == a.Id
select re.note).Average()
let i = (from im in dc.GetTable<tblSupplierItem>()
where im.SupplierId == a.Id
select im.tblItem.IconPath).ToArray().Add("test")
select new SearchResult
{
CompanyId = a.Id,
CompanyName = a.Company,
Localisation = a.Locality,
City = b.Name,
Zone = c.Name,
Rating = r.ToString(),
PathIcon1 = i.Take(1).SingleOrDefault(),
PathIcon2 = i.Skip(1).Take(1).SingleOrDefault(),
PathIcon3 = i.Skip(2).Take(1).SingleOrDefault(),
PathIcon4 = i.Skip(3).Take(1).SingleOrDefault(),
PathIcon5 = i.Skip(4).Take(1).SingleOrDefault()
}).ToList<SearchResult>();
}
Try this if you are get PathIcon2 value as "test" your problem isn't skip or take. Just i list includes one item. Adn I think so.

Join query creating problems in Linq to SQL

I have SQL query as:
SELECT b.firstName + ' ' + b.lastName AS Name, a.*
FROM EH_PP_TeacherObservations AS a INNER JOIN
account AS b ON a.EH_PP_TeacherAcctId = b.id LEFT JOIN
EH_PP_ObserverStatus AS c ON c.EH_PP_AcctId = b.id
WHERE a.EH_PP_TOSRT_TeacherObservationStatusIDEH = '0B823C51-EEAE-4490-B0EC-C1F0B1206AEB' AND
c.EH_PP_O_isObserver = 1
I wanted to have same query in linq.
I made it as follows:
List<Entity.account> list = new List<Entity.account>();
list = (
from a in context.EH_PP_TeacherObservations
join b in context.accounts on new { EH_PP_TeacherAcctId = a.EH_PP_TeacherAcctId } equals new { EH_PP_TeacherAcctId = b.id }
join c in context.EH_PP_ObserverStatus on new { EH_PP_AcctId = b.id } equals new { EH_PP_AcctId = Convert.ToGuid(c.EH_PP_AcctId) } into c_join
from c in c_join.DefaultIfEmpty()
where
a.EH_PP_TOSRT_TeacherObservationStatusIDEH == new Guid("0B823C51-EEAE-4490-B0EC-C1F0B1206AEB") &&
c.EH_PP_O_isObserver == true
select new
{
Name = (b.firstName + " " + b.lastName),
EH_PP_ObservationID = a.EH_PP_ObservationID,
EH_PP_TE_TeacherEvalID = a.EH_PP_TE_TeacherEvalID,
EH_PP_TOT_ObservationStartDateTime = a.EH_PP_TOT_ObservationStartDateTime,
EH_PP_TOT_ObservationEndDateTime = a.EH_PP_TOT_ObservationEndDateTime,
EH_PP_TOT_Announced = a.EH_PP_TOT_Announced,
EH_PP_TOT_ObservationNum = a.EH_PP_TOT_ObservationNum,
EH_PP_TeacherAcctId = a.EH_PP_TeacherAcctId,
EH_PP_ObserverAcctID = a.EH_PP_ObserverAcctID,
EH_PP_TOSRT_TeacherObservationStatusIDEH = a.EH_PP_TOSRT_TeacherObservationStatusIDEH
}
).ToList<Entity.account>();
But its giving me error on
join b in context.accounts on new { EH_PP_TeacherAcctId = a.EH_PP_TeacherAcctId } equals new { EH_PP_TeacherAcctId = b.id }
error is on 'join' word.
Type of one of expressions in the join clause is incorrect.
Type interface failed to call to 'join'
Please help me.
What is the mistake???

try this
List<Entity.account> list = new List<Entity.account>();
list = (
from a in context.EH_PP_TeacherObservations
join b in context.accounts on b.id equals a.EH_PP_TeacherAcctId
join c in context.EH_PP_ObserverStatus on Convert.ToGuid(c.EH_PP_AcctId) equals b.id into c_join
from c in c_join.DefaultIfEmpty()
where
a.EH_PP_TOSRT_TeacherObservationStatusIDEH == new Guid("0B823C51-EEAE-4490-B0EC-C1F0B1206AEB") &&
c.EH_PP_O_isObserver == true
select new
{
Name = (b.firstName + " " + b.lastName),
EH_PP_ObservationID = a.EH_PP_ObservationID,
EH_PP_TE_TeacherEvalID = a.EH_PP_TE_TeacherEvalID,
EH_PP_TOT_ObservationStartDateTime = a.EH_PP_TOT_ObservationStartDateTime,
EH_PP_TOT_ObservationEndDateTime = a.EH_PP_TOT_ObservationEndDateTime,
EH_PP_TOT_Announced = a.EH_PP_TOT_Announced,
EH_PP_TOT_ObservationNum = a.EH_PP_TOT_ObservationNum,
EH_PP_TeacherAcctId = a.EH_PP_TeacherAcctId,
EH_PP_ObserverAcctID = a.EH_PP_ObserverAcctID,
EH_PP_TOSRT_TeacherObservationStatusIDEH = a.EH_PP_TOSRT_TeacherObservationStatusIDEH
}
).ToList<Entity.account>();

Call Method from Linq query

I am using Linq query and call method Like..
oPwd = objDecryptor.DecryptIt((c.Password.ToString())
it will return null value.
Means this will not working.
how I Resolve this.
Thanks..
var q =
from s in db.User
join c in db.EmailAccount on s.UserId equals c.UserId
join d in db.POPSettings
on c.PopSettingId equals d.POPSettingsId
where s.UserId == UserId && c.EmailId == EmailId
select new
{
oUserId = s.UserId,
oUserName = s.Name,
oEmailId = c.EmailId,
oEmailAccId = c.EmailAccId,
oPwd = objDecryptor.DecryptIt(c.Password.ToString()),
oServerName = d.ServerName,
oServerAdd = d.ServerAddress,
oPOPSettingId = d.POPSettingsId,
};

If that is LINQ-to-SQL or Entity Framework. You'll need to break it into steps (as it can't execute that at the DB). For example:
var q = from s in db.User
join c in db.EmailAccount on s.UserId equals c.UserId
join d in db.POPSettings on c.PopSettingId equals d.POPSettingsId
where s.UserId == UserId && c.EmailId == EmailId
select new
{
oUserId = s.UserId,
oUserName = s.Name,
oEmailId = c.EmailId,
oEmailAccId = c.EmailAccId,
oPwd = c.Password,
oServerName = d.ServerName,
oServerAdd = d.ServerAddress,
oPOPSettingId = d.POPSettingsId,
};
then use AsEnumerable() to break "composition" against the back-end store:
var query2 = from row in q.AsEnumerable()
select new
{
row.oUserId,
row.oUserName,
row.oEmailId,
row.oEmailAccId,
oPwd = objDecryptor.DecryptIt(row.oPwd),
row.oServerName,
row.oServerAdd,
row.oPOPSettingId
};

var q = from s in db.User
join c in db.EmailAccount on s.UserId equals c.UserId
join d in db.POPSettings on c.PopSettingId equals d.POPSettingsId
where s.UserId == UserId && c.EmailId == EmailId
select new
{
oUserId = s.UserId,
oUserName = s.Name,
oEmailId = c.EmailId,
oEmailAccId = c.EmailAccId,
oPwd = c.Password,
oServerName = d.ServerName,
oServerAdd = d.ServerAddress,
oPOPSettingId = d.POPSettingsId,
};
foreach (var item in q)
{
item.oPwd = objDecryptor.DecryptIt(row.oPwd),
}
we can use a foreach loop also to update a single property. do not need to select all property in next query.

This has nothing about Linq query. you need to debug method objDecryptor.DecryptIt