sqlite - Specified Cast is not valid error in entity framework 4.3 code-first -


i use generic repository mvc , entity framework. in 1 of controller actions filter repostiory expression got "specified cast not valid" error. here code use: 

model.showrooms = _showroomrepositoy.getmany(q => q.provinceid == pid && q.districtid == did);

and showroom entity : 

public class showroom     {         public long id { get; set; }         public string name { get; set; }         public bool? ishipermarket { get; set; }         public bool? isexpress { get; set; }         public string address { get; set; }         public long provinceid { get; set; }         public long districtid { get; set; }         public string info { get; set; }         public string servicetime { get; set; }          public virtual province province { get; set; }         public virtual district district { get; set; }     }

here getmany code, in repositorybase: 

public virtual ienumerable<tentity> getmany(expression<func<tentity, bool>> where)         {             return dbset.where(where).tolist();         }

i couldn't find solution or error at.


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