我正在处理这个{
"took": 1,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 20967,
"max_score": 1,
"hits": [
{
"_index": "catalog-2018-03-03",
"_type": "product",
"_id": "151755703145e27e4983a0bd1b70be44",
"_score": 1,
"_source": {
"merchant": {
"link": "http://shophive.com/",
"name": "shophive"
},
"images": [
{
"url": "http://www.shophive.com/media/catalog/product/cache/1/small_image/165x/9df78eab33525d08d6e5fb8d27136e95/p/l/plantronics_savi_talk.jpg",
"path": "full/8e3587bd2b6107f0beafa9b1ba05f476539be0a8.jpg",
"checksum": "fa74ade23c8e80e9590d48d4e59b6b64"
}
],
"updated": "2018-03-18T13:06:33.583480",
"name": "Plantronics Savi Talk",
"created": "2018-03-18T13:06:33.583459",
"url": "http://www.shophive.com/plantronics-savi-talk",
"price": {
"new": 24999,
"old": 24999,
"discount_percent": 0
},
"category": {
"level_1": {
"url": "computers/tablets/networking",
"name": "Computers/Tablets & Networking "
},
"level_2": {
"url": "tablets/ebook-readers",
"name": "Tablets & eBook Readers"
}
}
}
}
}
}
项目，当我收到此错误时，我尝试将值从ASP.NET Core MVC保存到form：
无法隐式转换类型System.DateTime？＆＃39;到＆＃39; System.DateTime＆＃39;。存在显式转换（您是否错过了演员？）
我在{ViewModel：
中以下列方式使用Database将FromDate和ToDate设为nullable
视图模型：
?在public class ILViewModel
{
...
...
public DateTime? FromDate { get; set; }
public DateTime? ToDate { get; set; }
}
中，我将按以下方式向Controller - POST Method添加值：
控制器：
Database怎么办？
答案 0 :(得分：0)
您需要从可空对象中获取值。然后你不会得到错误
if (ModelState.IsValid)
{
...
historyObj.FromDate = locationsHistoryVM.FromDate.Value;
historyObj.ToDate = locationsHistoryVM.ToDate.Value;
}