Convert query (with sub query) to linq

Question

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Dear all

This is my query in Ms SQL, and this works well.

SQL

Select Id_per  From t011 Where id_reg = 22880 And id_cau NOT IN 
   (
      Select id_cau From t024 Where c_cau Like '%FIN%'  Or c_cau Like 
          '%PUB%' Or c_cau Like '%CHI%' 
   )

What I have tried:

Now I must convert in LinQ. This is the new query

C#

<pre>
    var query =

        (from r in t011 

         where r.id_reg == 22880 
		 
		  && ! (from c in t024 select c.id_cau).Contains(c.c_causale=='FIN' 
                 || c.c_causale=='PUB' || c.c_causale=='CHI')		 
		 
         select new
         {
             Id_per = r.id_per
         });

Why doesn't work ?? :-(

Posted 26-Sep-22 22:38pm

antobaro

Updated 26-Sep-22 23:03pm

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Richard Deeming · Accepted Answer · 2022-09-26T23:03:00

Because that's not the correct syntax for the Contains method.

Try:

C#

var subQuery = from c in t024
               where c.c_causale.Contains("FIN")
               || c.c_causale.Contains("PUB")
               || c.c_causale.Contains("CHI")
               select c.id_cau;

var query = from r in t011
            where r.id_reg == 22880
            && !subQuery.Contains(r.id_cau)
            select new
            {
                r.id_per
            };