Question

所以我有这段代码，

var CityName = (from ct in db.ZipCodes orderby ct.CityName
                       where (ct.StateName.Equals(StateName))
                       select ct.CityName).ToList().Distinct();
SelectList city = new SelectList(CityName);
ViewBag.City = city;

工作得很好，现在我需要一些从数据库中获取正确结果的条件。对此的查询是

select CityName from ZipCodes where StateName='New York' and CityType='D' group by CityName,AreaCode

现在有人请告诉我如何在此代码中使用该组，我试过但它给了我语法错误。

我也尝试创建一个存储过程

var CityName= db.sp_get_CityName(StateName).ToList();

但它会在下拉列表中填充sp_get_citynameresult。

我该如何解决这个问题？

Answer 1

您可以使用下面提到的代码。

var CityName=ZipCodes.Where(p=>p.StateName="New York" && CityType="D").GroupBy(q => new { q.AreaCode,q.CityName});

Answer 2

你必须这样做

var Result =   (from ct in db.ZipCodes
                where ct.StateName == "New York" && ct.CityType == "D"
                group ct by new { ct.CityName,ct.AreaCode }into g
                select new {CityName = g.Key.CityName,AreaCode = g.Key.AreaCode,g.ToList()};

在C＃问题中填充selectList

2 个答案: