Question

My Db column in a string (varchar) and i need to assign it to a int value.
I am using linq to query.Though the code compiles am getting an error at the run time .
Thanks in advance.

PFB my query :

var vlauesCap = from plan in entities.PA_RTM_CAP_Group
                select new Business.PartnerProfile.LookUp
                {
                 Id =Convert.ToInt32(plan.cap_group_code),
                 //(Int32)plan.cap_group_code,
                 Value = plan.cap_group_name
                      };
                   return vlauesCap.ToList();

Answer 1

The EF provider does not know how to translate Convert.ToInt() into SQL it can run against the database. Instead of doing the conversion on the server, you can pull the results back and do the conversion using linq to objects:

// the ToList() here causes the query to be executed on the server and
// the results are returned in a list of anonymous objects
var results = (from plan in entities.PA_RTM_CAP_Group 
               select new 
               { 
                   Code = plan.cap_group_code, 
                   Name = plan.cap_group_name 
               }).ToList();

// the conversion can now be done here using Linq to Objects
var vlauesCap = from r in results
                select new Business.PartnerProfile.LookUp  
                {  
                    Id = Convert.ToInt32(r.Code),
                    Value = r.Name
                };  

return vlauesCap.ToList();