I am trying to implement Inner join query on two tables opportunityProducts and Products where I am supposed to return Iqueryable element in my MVC web API service. But from below, I am not able to get result as it throws error for conversion.
public IQueryable<OpportunityProducts> GetProductsByShipID(int id)
{
IQueryable<OpportunityProducts> oppProductss =
from c in db.OpportunityProducts
from p in db.Products
where p.ProductID == c.ProductID
select new { c.Quantity,c.ProductDesc,c.RemainingQuantity, p.QtyInHand};
return oppProductss;
}
You need to fill the Type you wish to return instead of returning an anonymous type. Here since you are querying the OpportunityProducts, I think you don't have QtyInHand property. So you can either return a new type altogether or add this property.:-
IQueryable<ResultantProducts> oppProductss =
from c in db.OpportunityProducts
from p in db.Products
where p.ProductID == c.ProductID
select new ResultantProducts
{
Quantity = c.Quantity,
ProductDesc = c.ProductDesc,
RemainingQuantity = c.RemainingQuantity,
QtyInHand = p.QtyInHand
};
I see an error in your code. You should return objects of type OpportunityProducts, I mean:
public IQueryable<OpportunityProducts> GetProductsByShipID(int id)
{
IQueryable<OpportunityProducts> oppProductss = from c in db.OpportunityProducts
from p in db.Products
where p.ProductID == c.ProductID
select new OpportunityProducts // <---- THIS!
{
Quantity = c.Quantity,
ProductDesc = c.ProductDesc,
RemainingQuantity = c.RemainingQuantity,
QtyInHand = p.QtyInHand
};
return oppProductss;
}
I hope it helps you.
Regards,
Julio
I think you can create class called ResultProducts with all properties(same data type in the original table (nullable also need to put)) what you want to get. Then you can return that object.
public class ResultProducts
{
public int Quantity { get; set; }
public string ProductDesc { get; set; }
public int RemainingQuantity { get; set; }
public int QtyInHand { get; set; }
}
public IQueryable<ResultProducts> GetProductsByShipID(int id)
{
var oppProductss =from c in db.OpportunityProducts
from p in db.Products
where p.ProductID == c.ProductID
select new ResultProducts()
{
Quantity =c.Quantity,
ProductDesc= c.ProductDesc,
RemainingQuantity=c.RemainingQuantity,
QtyInHand=p.QtyInHand
};
return oppProductss ;
}
I hope this will work.
I keep getting the error below on my code, and can't understand why it is having problems translating it to a query, it is pretty simple.
I have 2 repositories, Album and AlbumImage, when I fetch an album do I want a cover, that is a subselect in AlbumImages. What am I doing wrong here?
LINQ to Entities does not recognize the method
'System.Linq.IQueryable`1[Sogaard.us.Cosplay.Data.AlbumImage] Get()'
method, and this method cannot be translated into a store expression.
Album repository
public class AlbumRepository : IRepository<Album>
{
private CosplayEntities _entities;
private IRepository<AlbumImage> _imageRepository;
public AlbumRepository(CosplayEntities entities, IRepository<AlbumImage> imageRepository)
{
_entities = entities;
_imageRepository = imageRepository;
}
public IQueryable<Album> Get()
{
return (from a in _entities.Albums
select new Album()
{
Id = a.Id,
UserId = a.UserId,
Name = a.Name,
Created = a.Created,
LastEdit = a.LastEdit,
Description = a.Description,
Views = a.Views,
Location = a.Location,
Photoshoot = a.Photoshoot,
Cover = (from ai in _imageRepository.Get() where ai.AlbumId == a.Id orderby ai.Cover descending, ai.Id ascending select ai).FirstOrDefault(),
});
}
}
AlbumImage repository
public class AlbumImageRepository : IRepository<AlbumImage>
{
private CosplayEntities _entities;
public AlbumImageRepository(CosplayEntities entities)
{
_entities = entities;
}
public IQueryable<AlbumImage> Get()
{
return (from ai in _entities.AlbumImages
select new AlbumImage()
{
Id = ai.Id,
AlbumId = ai.AlbumId,
UserId = ai.UserId,
Type = ai.Type,
Width = ai.Width,
Height = ai.Height,
Description = ai.Description,
Views = ai.Views,
Uploadet = ai.Uploadet,
LastView = ai.LastView,
Thumblink = ai.Thumblink,
Imagelink = ai.Imagelink,
Cover = ai.Cover
});
}
This is the code i am getting the error on
_albumImageRepository = new AlbumImageRepository(_entities);
_albumRepository = new AlbumRepository(_entities, _albumImageRepository);
_albumImagesTagRepository = new AlbumImagesTagRepository(_entities);
....
var album = _albumRepository.Get().Where(x => x.Id == image.AlbumId).FirstOrDefault();
Update: I have commented the Cover = ... out in my IQueryable Get() so it is 2 simple select as object.
And i still get the error in something as simple as
model.Albums = (from a in _albumRepository.Get()
orderby a.Id descending
select new AlbumDisplayModel()
{
Album = a,
ImageCount = _albumImageRepository.Get().Where(x => x.AlbumId == a.Id).Count(),
User = _userRepository.Get().Where(x => x.Id == a.UserId).FirstOrDefault()
})
.Skip(AlbumsPrPage * (page - 1))
.Take(AlbumsPrPage).ToList();
Update 2: If i rewrite the IQueryable Get() to the following, do it work flawlessly, there there should really be no diffrence in how it is handled?
public IQueryable<Album> Get()
{
return (from a in _entities.Albums
select new Album()
{
Id = a.Id,
UserId = a.UserId,
Name = a.Name,
Created = a.Created,
LastEdit = a.LastEdit,
Description = a.Description,
Views = a.Views,
Location = a.Location,
Photoshoot = a.Photoshoot,
Cover = (from ai in _entities.AlbumImages where ai.AlbumId == a.Id orderby ai.Cover descending, ai.Id ascending select new AlbumImage()
{
Id = ai.Id,
AlbumId = ai.AlbumId,
UserId = ai.UserId,
Type = ai.Type,
Width = ai.Width,
Height = ai.Height,
Description = ai.Description,
Views = ai.Views,
Uploadet = ai.Uploadet,
LastView = ai.LastView,
Thumblink = ai.Thumblink,
Imagelink = ai.Imagelink,
Cover = ai.Cover
}).FirstOrDefault(),
});
}
Update 3: Did a little test, and the problem seems to be with Entity framework, se the following code, The var linqAlbum = testClass.LinqAlbumGet().ToList(); executes without any problems and return the correct data, var eeAlbum = testClass.EEAlbumGet().ToList(); fails with the exception
LINQ to Entities does not recognize the method
'System.Linq.IQueryable`1[RepositoryTest.TestAlbumCover] EEImageGet()'
method, and this method cannot be translated into a store expression.
My test script
class Program
{
static void Main(string[] args)
{
var linq = new LinqDataContext();
var ee = new NewCosplayEntities();
var testClass = new Test(linq, ee);
var linqAlbum = testClass.LinqAlbumGet().ToList();
var eeAlbum = testClass.EEAlbumGet().ToList();
}
}
public class Test
{
public NewCosplayEntities ee { get; set; }
public LinqDataContext linq { get; set; }
public Test(LinqDataContext linq, NewCosplayEntities ee)
{
this.linq = linq;
this.ee = ee;
}
public IQueryable<TestAlbum> LinqAlbumGet()
{
return from a in linq.Albums
select new TestAlbum
{
Id = a.Id,
Name = a.Name,
Cover = (from i in LinqImageGet() where i.AlbumId == a.Id select i).FirstOrDefault()
};
}
public IQueryable<TestAlbumCover> LinqImageGet()
{
return from i in linq.AlbumImages
select new TestAlbumCover()
{
Id = i.Id,
AlbumId = i.AlbumId
};
}
public IQueryable<TestAlbum> EEAlbumGet()
{
return from a in ee.Albums
select new TestAlbum
{
Id = a.Id,
Name = a.Name,
Cover = (from i in EEImageGet() where i.AlbumId == a.Id select i).FirstOrDefault()
};
}
public IQueryable<TestAlbumCover> EEImageGet()
{
return from i in ee.AlbumImages
select new TestAlbumCover()
{
Id = i.Id,
AlbumId = i.AlbumId
};
}
}
public class TestAlbum
{
public int Id { get; set; }
public string Name { get; set; }
public TestAlbumCover Cover { get; set; }
}
public class TestAlbumCover
{
public int Id { get; set; }
public int AlbumId { get; set; }
}
Your problem comes in the ItemRepository for Albumn. Specifically because _entities has no knowledge of the _imageRepository type, so it doesn't know how to translate that type into the appropriate TSQL script. You could cast the _entities.Albums.ToList() to force the IQueryable into an IEnumerable before you try to access the _ImageRepository.Get() from the scope of the hydrated object instead of directly on the database instance. Realize that you are then going to see a perf hit on the n+1 database requests for the AlbumImage child objects for each Album.
public IQueryable<Album> Get()
{
return (from a in _entities.Albums
select new Album()
{
Id = a.Id,
UserId = a.UserId,
Name = a.Name,
Created = a.Created,
LastEdit = a.LastEdit,
Description = a.Description,
Views = a.Views,
Location = a.Location,
Photoshoot = a.Photoshoot,
Cover = (from ai in _imageRepository.Get() where ai.AlbumId == a.Id orderby ai.Cover descending, ai.Id ascending select ai).FirstOrDefault(),
});
}
Ultimately, the problem is that your trying to use an ActiveRecord pattern rather than a true repository. Everything in a single IQueryable needs to be fetched through the same database context instance for parsing and tracking purposes.
Potentially its because you are wrapping the Album and AlbumImage in new references. I would remove that and do the projection after your query.
I don't think you can project into an entity and have each projection use a result from another IQueryable. If you replaced the contents of IQueryable<AlbumImage> Get() with this, it might work:
from a in _entities.Albums
join c in _imageRepository.Get() on a.Id equals c.AlbumId into acJoin
from ac in acJoin.DefaultIfEmpty()
select new Album()
{
Id = a.Id,
etc..,
etc..,
Cover = ac
}
I'm actually fairly certain that you will need to adjust this freehand query, but essentially it's joining the IQueryables, then projecting those results into your objects, instead of projecting to your objects then inserting an IQueryable into those results. Not the best explanation I know, but just look up "LINQ Left Join" or "Linq Left Outer Join" to see the syntax of what I'm describing here. Example
I need to return a distinct list of records based on a car keywords search like: "Alfa 147"
The problem is that, as I have 3 "Alfa" cars, it returns 1 + 3 records (it seems 1 for the Alfa and 147 result, and 3 for the Alfa result)
EDIT:
The SQL-Server Query look something like this:
SELECT DISTINCT c.Id, c.Name /*, COUNT(Number of Ads in the KeywordAdCategories table with those 2 keywords) */
FROM Categories AS c
INNER JOIN KeywordAdCategories AS kac ON kac.Category_Id = c.Id
INNER JOIN KeywordAdCategories AS kac1 ON kac.Ad_Id = kac1.Ad_Id AND kac1.Keyword_Id = (SELECT Id FROM Keywords WHERE Name = 'ALFA')
INNER JOIN KeywordAdCategories AS kac2 ON kac1.Ad_Id = kac2.Ad_Id AND kac2.Keyword_Id = (SELECT Id FROM Keywords WHERE Name = '147')
My LINQ query is:
var query = from k in keywordQuery where splitKeywords.Contains(k.Name)
join kac in keywordAdCategoryQuery on k.Id equals kac.Keyword_Id
join c in categoryQuery on kac.Category_Id equals c.Id
join a in adQuery on kac.Ad_Id equals a.Id
select new CategoryListByKeywordsDetailDto
{
Id = c.Id,
Name = c.Name,
SearchCount = keywordAdCategoryQuery.Where(s => s.Category_Id == c.Id).Where(s => s.Keyword_Id == k.Id).Distinct().Count(),
ListController = c.ListController,
ListAction = c.ListAction
};
var searchResults = new CategoryListByBeywordsListDto();
searchResults.CategoryListByKeywordsDetails = query.Distinct().ToList();
The entities are:
public class Keyword
{
// Primary properties
public int Id { get; set; }
public string Name { get; set; }
}
// Keyword Sample Data:
// 1356 ALFA
// 1357 ROMEO
// 1358 145
// 1373 147
public class Category
{
// Primary properties
public int Id { get; set; }
public string Name { get; set; }
}
// Category Sample Data
// 1 NULL 1 Carros
// 2 NULL 1 Motos
// 3 NULL 2 Oficinas
// 4 NULL 2 Stands
// 5 NULL 1 Comerciais
// 8 NULL 1 Barcos
// 9 NULL 1 Máquinas
// 10 NULL 1 Caravanas e Autocaravanas
// 11 NULL 1 Peças e Acessórios
// 12 1 1 Citadino
// 13 1 1 Utilitário
// 14 1 1 Monovolume
public class KeywordAdCategory
{
[Key]
[Column("Keyword_Id", Order = 0)]
public int Keyword_Id { get; set; }
[Key]
[Column("Ad_Id", Order = 1)]
public int Ad_Id { get; set; }
[Key]
[Column("Category_Id", Order = 2)]
public int Category_Id { get; set; }
}
// KeywordAdCategory Sample Data
// 1356 1017 1
// 1356 1018 1
// 1356 1019 1
// 1357 1017 1
// 1357 1018 1
// 1357 1019 1
// 1358 1017 1
// 1373 1019 1
public class Ad
{
// Primary properties
public int Id { get; set; }
public string Title { get; set; }
public string TitleStandard { get; set; }
public string Version { get; set; }
public int Year { get; set; }
public decimal Price { get; set; }
// Navigation properties
public Member Member { get; set; }
public Category Category { get; set; }
public IList<Feature> Features { get; set; }
public IList<Picture> Pictures { get; set; }
public IList<Operation> Operations { get; set; }
}
public class AdCar : Ad
{
public int Kms { get; set; }
public Make Make { get; set; }
public Model Model { get; set; }
public Fuel Fuel { get; set; }
public Color Color { get; set; }
}
// AdCar Sample Data
// 1017 Alfa Romeo 145 1.6TDI 2013 ALFA ROMEO 145 1.6TDI 2013 12 2 1.6TDI 1000 1 2013 1 20000,0000 2052 AdCar
// 1018 Alfa Romeo 146 1.6TDI 2013 ALFA ROMEO 146 1.6TDI 2013 12 2 5 1.6TDI 1000 2 2013 1 20000,0000 2052 AdCar
// 1019 Alfa Romeo 147 1.6TDI 2013 ALFA ROMEO 147 1.6TDI 2013 12 2 6 1.6TDI 1000 3 2013 1 20000,0000 2052 AdCar
The result I expect for the search of "ALFA" is "Cars: 3" and for the search of "ALFA 147" is "Cars: 1" and actually the result I get is "Cars: 1 \n Cars: 3"
The kac is not filtering words... so this joins of kac, kac1 and kac2 will return 3 lines, cause this is the numbers of keywords for this ad
You should remove it..
Try this:
SELECT DISTINCT
c.Id, c.Name /*, COUNT(Number of Ads in the KeywordAdCategories table with those 2 keywords) */
FROM
Categories AS c
INNER JOIN
KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id
FROM Keywords
WHERE Name = 'ALFA')
AND kac1.Category_Id = c.Id
INNER JOIN
KeywordAdCategories AS kac2 ON kac1.Ad_Id = kac2.Ad_Id
AND kac2.Keyword_Id = (SELECT Id
FROM Keywords
WHERE Name = '147')
AND kac2.Category_Id = c.Id
I did a test...
Setting the ambient as
declare #Keywords table(id int,name varchar(max))
insert into #Keywords(id,name)
values (1356,'ALFA')
,(1357,'ROMEO')
,(1358,'145')
,(1373,'147')
declare #Categories table(id int, name varchar(max))
insert into #Categories(id,name)
values (1,'Carros')
,(2,'Motos')
declare #KeywordAdCategories table(Keyword_Id int, ad_Id int,Category_Id int)
insert into #KeywordAdCategories (Keyword_Id , ad_Id,Category_Id)
values (1356, 1017,1)
,(1356, 1018,1)
,(1356, 1019,1)
,(1357, 1017,1)
,(1357, 1018,1)
,(1357, 1019,1)
,(1358, 1017,1)
,(1373, 1019,1)
I run these two queries:
--query 1
SELECT
c.Id, c.Name,COUNT(*) as [count]
FROM
#Categories AS c
INNER JOIN
#KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id
FROM #Keywords
WHERE Name = 'ALFA')
AND kac1.Category_Id = c.Id
GROUP BY
c.Id, c.Name
I get this result set:
Id Name count
----------- ---------- -----------
1 Carros 3
and the second query for two words...
--query 2
SELECT
c.Id, c.Name,COUNT(*) as [count]
FROM
#Categories AS c
INNER JOIN
#KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id
FROM #Keywords
WHERE Name = 'ALFA')
AND kac1.Category_Id = c.Id
INNER JOIN
#KeywordAdCategories AS kac2 ON kac1.Ad_Id = kac2.Ad_Id
AND kac2.Keyword_Id = (SELECT Id
FROM #Keywords
WHERE Name = '147')
AND kac2.Category_Id = c.Id
GROUP BY
c.Id, c.Name
Result set is:
Id Name count
----------- ---------- -----------
1 Carros 1
Is this what you want?
You can use the Distinct() method.
var query = ...
var query = query.Distinct();
See This code returns distinct values. However, what I want is to return a strongly typed collection as opposed to an anonymous type for more details.
Split the query string into an array and iterate through querying the database for each keyword and joining the result sets using unions. The resultant set will be every distinct record that matches any of the given keywords.
Maybe this is close? At least the subqueries open it up a little for you to work with.
var query =
from c in categoryQuery
let keywords =
(
from k in keywordQuery where splitKeywords.Contains(k.Name)
join kac in keywordAdCategoryQuery on k.Id equals kac.Keyword_Id
where kac.Category_Id == c.Id
join a in adQuery on kac.Ad_Id equals a.Id
select k.Id
).Distinct()
where keywords.Any()
select new CategoryListByKeywordsDetailDto
{
Id = c.Id,
Name = c.Name,
SearchCount =
(
from kac in keywordAdCategoryQuery
where kac.Category_Id == c.Id
join kId in keywords on kac.Keyword_Id equals kId
select kac.Id
).Distinct().Count(),
ListController = c.ListController,
ListAction = c.ListAction
};
One of the beautiful features of linq is that you can build up complicated queries in smaller and simpler steps and let linq figure out how to join them all together.
The following is one way to get this information. I'm not sure whether this is the best and you would need to check it performs well when multiple keywords are selected.
Assuming keywords is defined something like
var keywords = "Alfa 147";
var splitKeywords = keywords.Split(new char[] {' '});
Stage 1
Get a list of keywords grouped by Ad and Category and
var subQuery = (from kac in keywordAdCategoryQuery
join k in keywordQuery on kac.Keyword_Id equals k.Id
select new
{
kac.Ad_Id,
kac.Category_Id,
KeyWord = k.Name,
});
var grouped = (from r in subQuery
group r by new { r.Ad_Id, r.Category_Id} into results
select new
{
results.Key.Ad_Id ,
results.Key.Category_Id ,
keywords = (from r in results select r.KeyWord)
});
Note, the classes you posted would suggest that your database does not have foreign key relationships defined between the tables. If they did then this stage would be slightly simpler to write.
Stage 2
Filter out any groups that do not have each of the keywords
foreach(var keyword in splitKeywords)
{
var copyOfKeyword = keyword ; // Take copy of keyword to avoid closing over loop
grouped = (from r in grouped where r.keywords.Contains(copyOfKeyword) select r) ;
}
Stage 3
Group by Category and count the results per category
var groupedByCategories = (from r in grouped
group r by r.Category_Id into results
join c in categoryQuery on results.Key equals c.Id
select new
{
c.Id ,
c.Name ,
Count = results.Count()
});
Stage 4
Now retrieve the information from sql. This should be done all in one query.
var finalResults = groupedByCategories.ToList();
So, if I understand the need correctly, you want all of the subset of words to be matched in the text and not the OR matching you are getting right now? I see at least two options, the first of which may not translate the split to SQL:
var query = from k in keywordQuery where !splitKeywords.Except(k.Name.split(' ')).Any()
This makes the following assumptions:
Your words in the Keywords are space delimited.
You are looking for exact matches and not partial matches. (I.e. Test will not match TestTest).
The other option being to dynamically generate a predicate using predicate builder (haven't done this in a while, my implementation might need tweaking - but this is the more likely (and better in my mind) solution):
var predicate = PredicateBuilder.True<keywordQuery>();
foreach (string s in splitKeywords) {
predicate.AND(s.Contains(k.Name));
}
query.Where(predicate);
If someone can comment if some of my syntax is off I would appreciate it. EDIT: Including link to a good reference on predicate builder: http://www.albahari.com/nutshell/predicatebuilder.aspx
UPDATE
Predicate builder across multiple tables, if anyone gets here looking for how to do that.
Can PredicateBuilder generate predicates that span multiple tables?
Should be possible to query for each keyword then union the result sets. The duplicate values will be removed from the union and you can work out the required aggregations.
Try removing the class while select
var query = (from k in keywordQuery where splitKeywords.Contains(k.Name)
join kac in keywordAdCategoryQuery on k.Id equals kac.Keyword_Id
join c in categoryQuery on kac.Category_Id equals c.Id
join a in adQuery on kac.Ad_Id equals a.Id
select new
{
Id = c.Id,
Name = c.Name,
SearchCount = keywordAdCategoryQuery.Where(s => s.Category_Id == c.Id).Where(s => s.Keyword_Id == k.Id).Distinct().Count(),
ListController = c.ListController,
ListAction = c.ListAction
}).Distinct().ToList();
var searchResults = new CategoryListByBeywordsListDto();
searchResults.CategoryListByKeywordsDetails = (from q in query select new CategoryListByKeywordsDetailDto
{
Id = q.Id,
Name = q.Name,
SearchCount = q.SearchCount,
ListController = q.ListController,
ListAction = q.ListAction
}).ToList();
You are doing a select distinct on a list of CategoryListByKeywordsDetailDto. Distinct only works on POCO and anonymous objects. In your case you need to implement the IEqualitycomparer for select distinct to work.
I tried this using LINQ directly against in memory collections (as in, not through SQL) - seems to work for me (I think the main point being that you want to search for Ads that apply to ALL the keywords specified, not ANY, correct?
Anyway, some sample code below (a little comment-ish and not necessarily the most efficient, but hopefully illustrates the point...)
Working with the following "data sets":
private List<AdCar> AdCars = new List<AdCar>();
private List<KeywordAdCategory> KeywordAdCategories = new List<KeywordAdCategory>();
private List<Category> Categories = new List<Category>();
private List<Keyword> Keywords = new List<Keyword>();
which are populated in a test method using the data you provided...
Search method looks a little like this:
var splitKeywords = keywords.Split(' ');
var validKeywords = Keywords.Join(splitKeywords, kwd => kwd.Name.ToLower(), spl => spl.ToLower(), (kwd, spl) => kwd.Id).ToList();
var groupedAdIds = KeywordAdCategories
.GroupBy(kac => kac.Ad_Id)
.Where(grp => validKeywords.Except(grp.Select(kac => kac.Keyword_Id)).Any() == false)
.Select(grp => grp.Key)
.ToList();
var foundKacs = KeywordAdCategories
.Where(kac => groupedAdIds.Contains(kac.Ad_Id))
.GroupBy(kbc => kbc.Category_Id, kac => kac.Ad_Id);
//Results count by category
var catCounts = Categories
.Join(foundKacs, cat => cat.Id, kacGrp => kacGrp.Key, (cat, kacGrp) => new { CategoryName = cat.Name, AdCount = kacGrp.Distinct().Count() })
.ToList();
//Actual results set
var ads = AdCars.Join(groupedAdIds, ad => ad.Id, grpAdId => grpAdId, (ad, grpAdId) => ad);
As I said, this is more to illustrate, please don't look too closely at the use of Joins & GroupBy etc (not sure its exactly, er, "optimal")
So, using the above, if I search for "Alfa", I get 3 Ad results, and if I search for "Alfa 147" I get just 1 result.
EDIT: I've changed the code to represent two possible outcomes (as I wasn't sure which was needed by your question)
ads will give you the actual Ads returned by the search
catCounts will give a list of anonymous types each representing the find results as a count of Ads by category
Does this help?
hi if i understand your problem correctly
"The problem is that, as I have 3 "Alfa" cars, it returns 1 + 3
records (it seems 1 for the Alfa and 147 result, and 3 for the Alfa
result)"
and Linq isn't really required i maybe have what you need just test it as new project
public Linqfilter()
{
//as Note: I modified a few classes from you because i doesn'T have your Member, Operation, Make,... classes
#region declaration
var originalAdCarList = new List<AdCar>()
{
new AdCar(){Id=1017, Title= "Alfa Romeo 145 1.6TDI 2013", Category= new Category(){Id =12}} ,
new AdCar(){Id=1018, Title= "Alfa Romeo 146 1.6TDI 2013", Category= new Category(){Id =11}} ,
new AdCar(){Id=1019, Title= "Alfa Romeo 147 1.6TDI 2013", Category= new Category(){Id =12}}
};
var originalKeywordAdCategoryList = new List<KeywordAdCategory>()
{
new KeywordAdCategory() { Keyword_Id=1356, Ad_Id=1017,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1356, Ad_Id=1018,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1356, Ad_Id=1019,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1357, Ad_Id=1017,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1357, Ad_Id=1018,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1357, Ad_Id=1019,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1358, Ad_Id=1017,Category_Id=1},
new KeywordAdCategory() { Keyword_Id=1373, Ad_Id=1019,Category_Id=1}
};
var originalCategoryList = new List<Category>()
{
new Category(){Id=1, Name="NULL 1 Carros"},
new Category(){Id=2, Name="NULL 1 Motos"},
new Category(){Id=3, Name="NULL 2 Oficinas"},
new Category(){Id=4 , Name="NULL 2 Stands"},
new Category(){Id=5 , Name="NULL 1 Comerciais"},
new Category(){Id=8, Name="NULL 1 Barcos"},
new Category(){Id=9 , Name="NULL 1 Máquinas"},
new Category(){Id=10 , Name="NULL 1 Caravanas e Autocaravanas"},
new Category(){Id=11 , Name="NULL 1 Peças e Acessórios"},
new Category(){Id=12 , Name="1 1 Citadino"},
new Category(){Id=13 , Name="1 1 Utilitário"},
new Category(){Id=14 , Name="1 1 Monovolume"}
};
var originalKeywordList = new List<Keyword>()
{
new Keyword(){Id=1356 ,Name="ALFA"},
new Keyword(){Id=1357 ,Name="ROMEO"},
new Keyword(){Id=1358 ,Name="145"},
new Keyword(){Id=1373 ,Name="147"}
};
#endregion declaration
string searchText = "ALFA";
// split the string searchText in an Array of substrings
var splitSearch = searchText.Split(' ');
var searchKeyList =new List<Keyword>();
// generate a list of Keyword based on splitSearch
foreach (string part in splitSearch)
if(originalKeywordList.Any(key => key.Name == part))
searchKeyList.Add(originalKeywordList.First(key => key.Name == part));
// generate a list of KeywordAdCategory based on searchKList
var searchKACList = new List<KeywordAdCategory>();
foreach(Keyword key in searchKeyList)
foreach (KeywordAdCategory kAC in originalKeywordAdCategoryList.Where(kac => kac.Keyword_Id == key.Id))
searchKACList.Add(kAC);
var groupedsearchKAClist = from kac in searchKACList group kac by kac.Keyword_Id;
var listFiltered = new List<AdCar>(originalAdCarList);
//here starts the real search part
foreach (IGrouping<int, KeywordAdCategory> kacGroup in groupedsearchKAClist)
{
var listSingleFiltered = new List<AdCar>();
// generate a list of AdCar that matched the current KeywordAdCategory filter
foreach (KeywordAdCategory kac in kacGroup)
foreach (AdCar aCar in originalAdCarList.Where(car => car.Id == kac.Ad_Id))
listSingleFiltered.Add(aCar);
var tempList = new List<AdCar>(listFiltered);
// iterrates over a temporary copie of listFiltered and removes items which don't match to the current listSingleFiltered
foreach (AdCar aC in tempList)
if (!listSingleFiltered.Any(car => car.Id == aC.Id))
listFiltered.Remove(aC);
}
var AdCarCount = listFiltered.Count; // is the count of the AdCar who match
var CatDic =new Dictionary<Category, int>(); // will contain the Counts foreach Categorie > 0
foreach(AdCar aCar in listFiltered)
if(originalCategoryList.Any(cat => cat.Id ==aCar.Category.Id))
{
var selectedCat = originalCategoryList.First(cat => cat.Id == aCar.Category.Id);
if (!CatDic.ContainsKey(selectedCat))
{
CatDic.Add(selectedCat, 1);//new Category Countvalue
}
else
{
CatDic[selectedCat]++; //Category Countvalue +1
}
}
}
}
public class Keyword
{
// Primary properties
public int Id { get; set; }
public string Name { get; set; }
}
public class Category
{
// Primary properties
public int Id { get; set; }
public string Name { get; set; }
}
public class KeywordAdCategory
{
//[Key]
//[Column("Keyword_Id", Order = 0)]
public int Keyword_Id { get; set; }
//[Key]
//[Column("Ad_Id", Order = 1)]
public int Ad_Id { get; set; }
//[Key]
//[Column("Category_Id", Order = 2)]
public int Category_Id { get; set; }
}
public class Ad
{
// Primary properties
public int Id { get; set; }
public string Title { get; set; }
public string TitleStandard { get; set; }
public string Version { get; set; }
public int Year { get; set; }
public decimal Price { get; set; }
// Navigation properties
public string Member { get; set; }
public Category Category { get; set; }
public IList<string> Features { get; set; }
public IList<int> Pictures { get; set; }
public IList<string> Operations { get; set; }
}
public class AdCar : Ad
{
public int Kms { get; set; }
public string Make { get; set; }
public int Model { get; set; }
public int Fuel { get; set; }
public int Color { get; set; }
}
hopefully it will help you or someone else
Edit:
extended my Methode Linqfilter() to answer the request
Edit2:
i think that should be exactly what you are looking for
var selectedKWLinq = from kw in originalKeywordList
where splitSearch.Contains(kw.Name)
select kw;
var selectedKACLinq = from kac in originalKeywordAdCategoryList
where selectedKWLinq.Any<Keyword>(item => item.Id == kac.Keyword_Id)
group kac by kac.Keyword_Id into selectedKAC
select selectedKAC;
var selectedAdCar = from adC in originalAdCarList
where (from skAC in selectedKACLinq
where skAC.Any(kac => kac.Ad_Id == adC.Id)
select skAC).Count() == selectedKACLinq.Count()
select adC;
var selectedCategorys = from cat in originalCategoryList
join item in selectedAdCar
on cat.Id equals item.Category.Id
group cat by cat.Id into g
select g;
//result part
var AdCarCount = selectedAdCar.Count();
List<IGrouping<int, Category>> list = selectedCategorys.ToList();
var firstCategoryCount = list[0].Count();
var secoundCategoryCount = list[1].Count();
Fiuu, this was brain-wreck. I splited query in several pieces, but it's executed as a whole at the end (var result). And I returned anonymous class, but intention is clear.
Here is the solution:
var keywordIds = from k in keywordQuery
where splitKeywords.Contains(k.Name)
select k.Id;
var matchingKac = from kac in keywordAdCategories
where keywordIds.Contains(kac.Keyword_Id)
select kac;
var addIDs = from kac in matchingKac
group kac by kac.Ad_Id into d
where d.Count() == splitKeywords.Length
select d.Key;
var groupedKac = from kac in keywordAdCategoryQuery
where addIDs.Contains(kac.Ad_Id)
group kac by new { kac.Category_Id, kac.Ad_Id };
var result = from grp in groupedKac
group grp by grp.Key.Category_Id into final
join c in categoryQuery on final.Key equals c.Id
select new
{
Id = final.Key,
Name = c.Name,
SearchCount = final.Count()
};
// here goes result.ToList() or similar