No mapping exists from object type System.Collections.Generic.List when executing stored proc with parameters in EF 4.3

Question

Lately I've been working on stored procedure and encountered 1 strange problem.

First, I was able to successfully call a stored procedure from the database via:

IList<XXXViewModel> XXXList = _context.Database.SqlQuery("spXXX").ToList();

But when I needed to pass parameters it failed:

var parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("param1", param1Value));
parameters.Add(new SqlParameter("param2", param2Value));
IList<XXXViewModel> XXXList =
_context.Database.SqlQuery<XXXViewModel>("spXXX @param1, @param2", parameters).ToList();

And I got the ff, error:

No mapping exists from object type System.Collections.Generic.List`1[[System.Data.SqlClient.SqlParameter, System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] to a known managed provider native type.

Note that I've also tried:

_context.Database.ExecuteSqlCommand<EXEC XXXViewModel>("spXXX @param1, @param2", parameters).ToList();

But got the same result :-(.

Also I've tried calling, by specifying each of the parameters:

IList<XXXResult> query = Context.Database.SqlQuery<XXXResult>("SP @paramA, @paramB, @paramC", new SqlParameter("paramA", "A"), new SqlParameter("paramB", "B"), new SqlParameter("paramC", "C")).ToList();

Anyone has any idea?

Answer 1

You need to pass each parameter to the method (ie You can't pass a list)

IList<XXXViewModel> XXXList =
     _context.Database.SqlQuery<XXXViewModel>("spXXX @param1, @param2", 
     new SqlParameter("param1", param1Value), 
     new SqlParameter("param2", param2Value)).ToList();