c# - Multiple Joins with multiple conditions -


i trying list out grid view of cities have respective country , area status true.
here hierarchy country -> area -> city .here's code.
somehow shows error joins:-

the type of 1 of expression in join clause incorrect.type inference failed call join

what missing?

protected void fn_fill_city() {     ef_dv.dbentities city_context = new ef_dv.dbentities();     try     {         var row_city =              (from city_table in city_context.dv_tbl_city             join country_table in city_context.dv_tbl_country                   on new {                      c_id = city_table.city_country_id,                      c_status = true                   }                   equals new {                     c_id = country_table.country_id,                      c_status = country_table.country_status                   }             join area_table in city_context.dv_tbl_area                   on new {                      area_id = city_table.city_area_id,                      a_status = true                   }                   equals new {                      area_id = area_table.area_id,                      a_status = area_table.area_status                   }             orderby city_table.city_name             (                                                       (city_table.city_name.contains(txt_search_city.text.trim()) ||                    (txt_search_city.text.trim() == ""))                   )             select new             {                 city_table.city_id,                 city_table.city_name,                 city_table.city_status,                 city_table.city_code,                 country_table.country_name,                 area_table.area_name             }).tolist();         gv_city.datasource = row_city;         gv_city.databind();         gv_city.headerrow.tablesection = tablerowsection.tableheader;     }     catch (exception ex)     {         throw ex;     }         {         city_context = null;     } }

maybe trim() operation not supported db driver... try removing trim()


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