IN operation in LINQ

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Hi . I want to write this t-sql in LINQ

SQL

select * from [Ticket] t where t.TicketStatusId in
(
    select k.TicketStatusId  from [TreeOfKnowledgeData] k
)

please help me .

Posted 12-May-15 20:05pm

khosro goudarzi

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King Fisher · Answer 1 · 2015-05-12T20:13:00

Solution 1

IN = Contains in Linq

http://www.dotnetperls.com/list-contains[^]

but, your sql query is obviously look like this

http://stackoverflow.com/questions/25355004/simple-example-subquery-linq[^]

I hope this will help you :)

Posted 12-May-15 20:13pm

King Fisher

Updated 12-May-15 20:14pm

v2

Maciej Los · Answer 2 · 2015-05-12T20:37:00

Think of it! You don't need to use IN, you have to use Join[^]! Why? It's quite obvious: above statement get only that tickets which TicketStatusId field is equal to TreeOfKnowledgeDataTicketStatusId.

C#

var qry = from ticket in Tickets 
     join knowdata in TreeOfKnowledgeDatas on ticket.TicketStatusId equals knowdata.TicketStatusId
    select ticket;

If you would like to get data from both "tables", try this:

C#

var qry = from ticket in Tickets 
     join knowdata in TreeOfKnowledgeDatas on ticket.TicketStatusId equals knowdata.TicketStatusId
    select new
    {
         statid = ticket.TicketStatusId, 
         kbd    = knowdata.AnotherField
    };