从View到控制器的数据正在传递空值

Question

我在此“查看”页面上获得了“用户”的“当前登录用户名”，日期和页面标题，并将这些值传递给控制器以保存到数据库表中。 但是，这些值会将null从视图传递给控制器。 我不确定是否可以获取像这样的值并传递给控制器并存储在DB中。

查看：

  @model Sample.Models.UserLog
   @{
     ViewBag.Title = "Index";
    }
         @using (Html.BeginForm("Idex", "Index", FormMethod.Post, new { enctype = "multipart/form-data" }))
      {

     @Html.AntiForgeryToken()

<br/>
<br/>

<p >@ViewBag.Title</p>
<P>@User.Identity.Name</P>
<p>@Html.TextBoxFor(model => model.Date, new { @Value = @DateTime.Now.ToShortDateString() })</p>

}

控制器：

public class HomeController : Controller
{

    private readonly UserLogEntities _db = new UserLogEntities();


    public ActionResult Index([Bind(Include = "Name, Date, Title")]  UserLog log)
    {
        ViewBag.UserName = HttpContext.User.Identity.Name;

        if (ModelState.IsValid)
        {

            _db.UserActivityLogs.Add(log);
            _db.Entry(log).State = EntityState.Added;
            _db.SaveChanges();

        }
        return View();
    }

}

型号：

public partial class UserLog
{
    public string UserName { get; set; }
    public string EndPoint { get; set; }
    public System.DateTime Date { get; set; }
}

Answer 1

https://dotnetfiddle.net/AyeU9M

如果在Post Action中放置一个断点，您将看到View表返回的Action中的值

CREATE TABLE [AHCCCS\KXBlau].[UserLog](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [UserName] [varchar](30) NULL,
    [EndPoint] [varchar](30) NULL,
    [Date] [datetime] NULL,
 CONSTRAINT [PK_UserLog] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

控制器/视图模型

public class UserLogViewModel
{
    public string UserName { get; set; }
    public string EndPoint { get; set; }
    public string Date { get; set; }
}

public class HomeController : Controller
{
    private readonly SMARTEntities3 _db = new SMARTEntities3();

    [HttpPost]
    public ActionResult MyIndex([Bind(Include = "UserName, EndPoint, Date")]  UserLogViewModel log)
    {
        ViewBag.UserName = HttpContext.User.Identity.Name;

        if (ModelState.IsValid)
        {
            //from viewmodel to object
            UserLog userLog = new UserLog { Date = DateTime.Parse(log.Date), EndPoint = log.EndPoint, 
                UserName = log.UserName };

            _db.UserLogs.Add(userLog);
            _db.Entry(log).State = EntityState.Added;
            _db.SaveChanges();

        }
        return View();
    }

    public ActionResult Tut142()
    {
        return View();
    }

视图

@model Testy20161006.Controllers.UserLogViewModel
@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Tut142</title>
</head>
<body>
    @using (Html.BeginForm("MyIndex", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
    {
        @Html.AntiForgeryToken()
        <br />
        <br />
        <p>@User.Identity.Name</p>
        <p>
            @*@Html.TextBoxFor(model => model.Date, new { @Value = @DateTime.Now.ToShortDateString() })*@
            @Html.LabelFor(model => model.UserName)
            @Html.TextBoxFor(model => model.UserName)
        </p>
        <p>
            @Html.LabelFor(model => model.EndPoint)
            @Html.TextBoxFor(model => model.EndPoint)
        </p>
        <p>
            @Html.LabelFor(model => model.Date)
            @Html.TextBoxFor(model => model.Date)
        </p>
        <input type="submit" value="Go" />
    }
</body>
</html>

从View到控制器的数据正在传递空值

问题描述

1 个解决方案

解决方案1
0 已采纳 2019-01-08 19:00:25

从View到控制器的数据正在传递空值

问题描述

1 个解决方案

解决方案1 0 已采纳 2019-01-08 19:00:25

解决方案1
0 已采纳 2019-01-08 19:00:25