Linq to SQL how to do "where [column] in (list of values)"

linq, linq-to-sql

Solution

Use

where list.Contains(item.Property)

Or in your case:

var foo = from codeData in channel.AsQueryable<CodeData>()
          where codeIDs.Contains(codeData.CodeId)
          select codeData;

But you might as well do that in dot notation:

var foo = channel.AsQueryable<CodeData>()
                 .Where(codeData => codeIDs.Contains(codeData.CodeId));

Problem

I have a function where I get a list of ids, and I need to return the a list matching a description that is associated with the id. E.g.: ``` public class CodeData { string CodeId {get; set;} string Description {get; set;} } public List<CodeData> GetCodeDescriptionList(List<string> codeIDs) //Given the list of institution codes, return a list of CodeData //having the given CodeIds } ``` So if I were creating the sql for this myself, I would simply do something like the following (where the in clause contains all the values in the codeIds argument): ``` Select CodeId, Description FROM CodeTable WHERE CodeId IN ('1a','2b','3') ``` In Linq to Sql I can't seem to find the equivalent of the "IN" clause. The best I've found so far (which doesn't work) is: ``` var foo = from codeData in channel.AsQueryable<CodeData>() where codeData.CodeId == "1" || codeData.CodeId == "2" select codeData; ``` The problem being, that I can't dynamically generate a list of "OR" clauses for linq to sql, because they are set at compile time. How does one accomplish a where clause that checks a column is in a dynamic list of values using Linq to Sql?

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