c# - Entity Framework 中的查询

Question

我必须使用此查询获取前20行，并且like子句不起作用。谁能告诉我为什么/帮助我找到解决方案？

var zipcodes = (from results in db1.ZipCodes1 
                                 where  results.CityType == "D" && results.ZIPCode like '%ZC %'
                                 select new Ajaxresults 
                {
                   ZIPCode= results.ZIPCode,
                   CityName = results.CityName,
                   StateAbbr = results.StateAbbr,
                   StateName = results.StateName
                }).GroupBy(o => o.ZIPCode);

Answer 1

若要选择前20行，应使用LINQ Take运算符

var zipcodes = (from results in db1.ZipCodes1
   ...
   ).Take(20);