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我不明白爲什麼這個結果會一直返回null。我知道ID 100存在於數據庫中。我正在創建可以存儲到數據庫中的在線表單。我希望能夠通過ID將他們拉回來更新信息。MVC/Entity Framework編輯動作
public ActionResult reviewPreevent(int? id)
{
id = 100;
if (id.HasValue)
{
using(formEntities db = new formEntities()) {
var form = (from a in db.form_preevent
select new preeventForm
{
id = a.id,
meeting = a.meeting,
date = (DateTime)a.eventDate,
location = a.location,
p1Foyer = (bool)a.p1Foyer,
p2Foyer = (bool)a.p2Foyer,
meetingRoom = (bool)a.meetingroom,
skRoom = (bool)a.skroom,
kk1 = (bool)a.kk1,
kk2 = (bool)a.kk2,
nursery = (bool)a.nursery,
Sanctuary = (bool)a.sanctuary,
kitchen = (bool)a.kitchen,
parkingLot = (bool)a.parkinglot,
mainLeaders = a.mainleaders,
helpers = a.helpers,
backup = a.backuphelps,
soundboard = (bool)a.soundboard,
soundboardtech = a.soundboardtech,
projector = (bool)a.projector,
projectorOp = a.projectorop,
camera = (bool)a.camera,
cameraops = a.cameraops,
livestream = (bool)a.livestream,
ushers = (bool)a.ushers,
totalUshers = (int)a.totalushers,
greeters = (bool)a.greeters,
totalGreeters = (int)a.totalgreeters,
security = (bool)a.security,
setupTime = (DateTime)a.setuptime,
setup = a.setup,
breakdown = a.breakdown,
foodItems = a.fooditems,
groceryShoppers = a.groceryshoppers,
foodPrepPersonal = a.foodprep,
estExpense = (float)a.estexpense,
estIncome = (float)a.estincome,
expense = (float)a.expense,
income = (float) a.income
}).Where(t => t.id == id).FirstOrDefault();
return View();
}
}else
{
TempData["notice"] = "No form with ID: " + id + " was found.";
return View();
}
}
還有更簡單的方法來匹配一個sql類到viewmodels類嗎?
先構建一個最小查詢:var form = db.form_preevent.FirstOrDefault(x => x.id == 100);看看是否有效。至於你的第二個問題,使用[AutoMapper](http://docs.automapper.org/en/stable/Queryable-Extensions.html)複製所有這些字段。 –
請細化您的問題或標記以下答案之一爲已接受。 –