Question

I’m trying to merge these two object but not totally sure how.. Can you help me merge these two result objects?

 //
 // Create Linq Query for all segments in "CognosSecurity"
 //
 var userListAuthoritative = (from c in ctx.CognosSecurities
                             where (c.SecurityType == 1 || c.SecurityType == 2)
                             select new {c.SecurityType, c.LoginName , c.SecurityName}).Distinct();
 //
 // Create Linq Query for all segments in "CognosSecurity"
 //
 var userListAuthoritative3 = (from c in ctx.CognosSecurities
                              where c.SecurityType == 3 || c.SecurityType == 0
                              select new {c.SecurityType , c.LoginName }).Distinct();

I think I see where to go with this… but to answer the question the types of the objects are int, string, string for SecurityType, LoginName , and SecurityName respectively

If you’re wondering why I have them broken like this is because I want to ignore one column when doing a distinct. Here are the SQL queries that I’m converting to SQL.

  select distinct SecurityType, LoginName, 'Segment'+'-'+SecurityName
FROM [NFPDW].[dbo].[CognosSecurity]
where SecurityType =1

  select distinct SecurityType, LoginName, 'Business Line'+'-'+SecurityName
FROM [NFPDW].[dbo].[CognosSecurity]
where SecurityType =2

   select distinct SecurityType, LoginName, SecurityName
FROM [NFPDW].[dbo].[CognosSecurity]
where SecurityType in (1,2)

Answer 1

You can’t join these because the types are different (first has 3 properties in the resulting type, second has two).

If you can tolerate putting a null value in for the 3rd result of the second query this will help. I would then suggest you just do a userListAuthoritative.concat(userListAuthoritative3 ) BUT I think this will not work as the anonymous types generated by the linq will not be of the same class, even tho the structure is the same. To solve that you can either define a CustomType to encapsulate the tuple and do select new CustomType{ ... } in both queries or postprocess the results using select() in a similar fashion.

Acutally the latter select() approach will also allow you to solve the parameter count mismatch by implementing the select with a null in the post-process to CustomType.

EDIT: According to the comment below once the structures are the same the anonymous types will be the same.