c# - The argument types 'Edm.String' and 'Edm.Int32' are incompatible for this operation -

i getting error above tag @ place of

return view(st.employees.find(id));

above place ,can 1 me this! , code is

     namespace startapp.controllers   { public class employcontroller : controller {     startentities st = new startentities();     //list     public actionresult list()     {         return view(st.employees.tolist());     }     //details     public actionresult details(int id = 0)     {         return view(st.employees.find(id));     }     //create     public actionresult create()     {        return view();     }       [httppost,validateantiforgerytoken]     public actionresult create(employee e)     {         using(st)         {             st.employees.add(e);             try             {                 st.savechanges();             }             catch            {                system.diagnostics.debug.writeline("here error");             }         }         return redirecttoaction("list");     }    //edit     public  actionresult edit(int id = 0)     {             return view(st.employees.find(id));      }      [httppost,validateantiforgerytoken]     public actionresult edit(employee e)     {         st.entry(e).state = entitystate.modified;         st.savechanges();         return redirecttoaction("list");     }     //delete     public actionresult delete(int id = 0)     {         return view(st.employees.find(id));     }     [httppost,actionname("delete")]     public actionresult delete_conf(int id)     {         employee emp = st.employees.find(id);            st.employees.remove(emp);            st.savechanges();            return redirecttoaction("list");     }  } 

}

can 1 me rectify error!

this exception happens when entities primary key of type , passing variable not of type find method.

from official documentation of find method, may throw below exception

invalidoperationexception

thrown if types of key values not match types of key values entity type found.

make sure use same type variable when call find method.

in code, passing integer variable find method. error believe entity classes primary key not int type. may guid type, in case, make sure passing valid guid value find method.

you can open edmx file , see type of key , make sure pass same type find method.

just right click on entity in edmx file , select properties.