I do left join and right join then do union for full outer join here is my code
var brndT = (from a in db.TSA_TARGET_DETAIL
where a.OUTLET_ID == id && a.CAMPAIGN_ID == campaignId && a.EMPLOYEE_ID == empId
select new
{
ID=a.BRAND_ID,
Target=a.STICK_QTY
}).ToList();
var brndS = (from p in db.SR_TRN_DETAILS
where
(from ppt in db.SR_TRN_MAIN
where
ppt.MEMO_DATE >= d2 && ppt.MEMO_DATE <= d1 && ppt.OUTLET_ID==id
select ppt.ORDER_ID).Contains(p.ORDER_ID)
group p by p.BRAND_ID into g
select new
{
ID = g.Key,
Qty = g.Select(x => x.QUANTITY).Sum()
}).ToList();
var left = (from T in brndT
join S in brndS
on T.ID equals S.ID
into temp
from S in temp.DefaultIfEmpty()
select new BrandSalesTarget
{
ID=T.ID,
Target = T.Target==null?0:(int)T.Target,
Sales = S != null ? (int)S.Qty : 0,
}).ToList();
var right = (from S in brndS
join T in brndT
on S.ID equals T.ID
into temp
from T in temp.DefaultIfEmpty()
select new BrandSalesTarget
{
ID=S.ID,
Sales = S.Qty==null?0:(int)S.Qty,
Target = T != null ? (int)T.Target : 0
}).ToList();
var fullOuter = left.Union(right).ToList();
But union does not work. I get the same id twice. What's wrong with my code? Anyone helps is greatly appreciated. Thanks in advance.
Try using a IEqualityComparer so the union knows which elements are the same.
Code borrowed from. union in two linq statements and remove the duplicate .
class FirstElementComparer : IEqualityComparer<string[]>
{
//TODO error checking
public bool Equals(string[] a, string[] b)
{
return a[0].Equals(b[0]);
}
public Int32 GetHashCode(string[] obj)
{
return obj[0].GetHashCode();
}
}
and use it like this:
void Main()
{
string[][] query1 = {new [] {"this is a test","Yes", "This is a remark"},
new [] {"this is a test2","No", "This is the second remark"}};
string[][] query2 = {new [] {"this is a test","",""},
new [] {"this is a test2","",""},
new [] {"this is a test3","",""},
new [] {"this is a test4","",""}};
query1.Union(query2, new FirstElementComparer()).Dump();
}
The EqualityComparer is used by Union to compare the elements in query1 with the elements in query2. It does so by just comparing the first item in each array.
I future please simplify your code the the minimum number of lines to show the actual issue, ideally in the form of a complete short program which can be run instead of copying and pasting a chunk of production code which any helpers will have trouble using to reproduce the problem.
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