convert this SQL to link Left Outer Join and a Case statement - linq

Question

I am having problem converting this sql statement into Linq. It has a Left outer join and a case statement. I will try the answer given below.
SELECT [job_required_document].[job_required_document_id]
,[document_name]
,[document_description]
,CASE WHEN dlink.job_required_document_id is NULL THEN 0 ELSE 1 END AS DocIsRequired
FROM [dbo].[job_required_document]
LEFT OUTER JOIN [dbo].[job_description_document_link] dlink ON job_required_document.job_required_document_id = dlink.job_required_document_id
AND dlink.job_description_id = #JobDescriptionId
**This is what i had done. But the docIsRequired is coming 1 for all the records. I think the case statement is wrong.
var query = from document in context.job_required_documents
join dlink in context.job_description_document_links.Where(q => q.job_description_id == job_description_id && q.job_description_id == job_description_id)
on document.job_required_document_id equals dlink.job_required_document_id into documentdlink
from q in documentdlink.DefaultIfEmpty()
select new Documents
{
job_description_id = job_description_id,
job_required_document_id = document.job_required_document_id,
document_name = document.document_name,
document_description = document.document_description,
docIsRequired = document.job_required_document_id == null ? 0 : 1
};

Answer 1

Create a custom class with following details:
public class DocumentDetails
{
public int docID {get;set;}
public string docName {get;set;}
public string docDesc {get;set;}
public int docIsRequired {get;set;}
}
Now use this LINQ to fetch data into this class type's collection as mentioned below:
List<DocumentDetails> documentDetialsList = (from document in datacontext.job_required_document
from dlink in datacontext.job_description_document_link
.where(x=> x.job_required_document_id == document.job_required_document_id).DefaultIfEmpty()
where dlink.job_description_id == #JobDescriptionId
select new {
docID = document.[job_required_document_id],
docName = document.[document_name],
docDesc = document.[document_description],
docIsRequired = dlink.job_required_document_id == null ? 0 : 1
}).ToList();
Hopefully it would help...