Linq distinct record containing keywords

Question

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 (i

Answer 1

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() 
        {
            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() 
        {
            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()
        {
            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() 
        {
             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();

        // 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();
        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(originalAdCarList);

        //here starts the real search part
        foreach (IGrouping kacGroup in groupedsearchKAClist)
        {

            var listSingleFiltered = new List();
            //  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(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(); // 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 Features { get; set; }
    public IList Pictures { get; set; }
    public IList 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(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> list = selectedCategorys.ToList(); 
        var firstCategoryCount = list[0].Count();
        var secoundCategoryCount = list[1].Count();