model 项目传递的类型为“Generic.List1[warehouse.Models.STATISTIC]”，但类型为 collections.Generic.List1[warehouse.Models.programs_tests]

Question

我需要在不同于我得到的表中插入数据

我从表 PROGRAMS_TESTS 中获取数据

我需要将数据插入 STATISTICS 表

• 这是 GET 操作结果代码：

   public ActionResult Statistics(int programId ) { int[] testids = { 51, 52, 54, 55, 56, 57, 60, 1125, 3161 }; var stat = (from programs_tests in _context.programs_tests join labTest in _context.LabTests on programs_tests.testid equals labTest.TestId where programs_tests.program_id == programId &&.testids.Contains(labTest.TestId) select programs_tests);ToList(); return View(stat) }

• 这是 POST 操作结果：

   [HttpPost] [ValidateAntiForgeryToken] public ActionResult Statistics(List<STATISTIC> stat) { int hospital = Convert.ToInt32(Session["UserID"]); var data = new STATISTIC(); if (ModelState.IsValid) { using (dbEntities db = new dbEntities()) { foreach (var i in stat) { data.DATE = DateTime.Now; data.hospital_no = hospital; db.STATISTICS.Add(i); } db.SaveChanges(); // ViewBag.Message("Inserted Successfully"); ModelState.Clear(); } } return View(stat); }

这是查看代码

@model List<warehouse.Models.programs_tests>

@{
    ViewBag.Title = "Statistics";
    Layout = "~/Views/Shared/_LayoutDashboard.cshtml";
}

<div>
    <table class="table table-bordered" style="background-color:aqua">
        <tr>
            <td>
                @Html.Label("Hospital Name :")
                @Session["UserFullName"]
            </td>
            <td>
                @Html.Label("Program Name :")
                @Html.DisplayFor(model => Model.FirstOrDefault().Program.name)
            </td>
            <td>
                @Html.Label("Date :") @DateTime.Now
            </td>
        </tr>
    </table>
</div> 

@using (Html.BeginForm("Statistics", "HospitalSamples", FormMethod.Post))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)

    @*if (ViewBag.Message != null)
    {
        <div style="border:solid 1px green">
            @ViewBag.Message
        </div>
    }*@

    <table  border="0" cellpadding="0" cellspacing="0">
        <tr>
            <th>@Html.DisplayNameFor(model => model.FirstOrDefault().LabTest.TestName)</th>
            <th> @Html.Label("No of Samples")</th>
        </tr>
       @for (int i = 0; i < Model.Count(); i++)
       {
          {
                <tr style="border:1px solid black">
                    <td>@Html.TextBoxFor(a => a[i].LabTest.TestName , new { @readonly = "readonly" })</td>
                    <td>@Html.TextBox("TestCount")</td>
                    <td>@Html.HiddenFor(a => a[i].testid)</td>
                    <td>@Html.HiddenFor(a => a[i].program_id)</td>
                  
                   
                </tr>
              
            }
        }
    </table>
        <input type="submit" value="Save" class="btn btn-danger" />
}
   
   @Html.ActionLink("Back To List", "Index")

当我单击保存时，它显示以下错误：

"The model item passed into the dictionary is of type 'System.Collections.Generic.List 1[warehouse.Models.STATISTIC]', but this dictionary requires a model item of type 'System.Collections.Generic.List 1[warehouse. Models.programs_tests]'。"

Answer 1

您观察到的由return View(stat); public ActionResult Statistics(List<STATISTIC> stat)操作方法中的行。 By this line of code the controller creates a System.Web.Mvc.ViewResult object by using the model of type List<STATISTIC> that should render the Statistics view to the response. 但实际上强类型Statistics视图正在等待List<warehouse.Models.programs_tests>类型的 model 。

因此，您应该正确地修复您的代码，以便ActionResult Statistics(List<STATISTIC> stat)操作方法将预期的数据类型传递给Statistics视图。

我想应该将您的public ActionResult Statistics(List<STATISTIC> stat)方法声明更改为public ActionResult Statistics(List<arehouse.Models.programs_tests> stat)并相应地更新此方法的内容以将更新的数据保存到数据库中。

顺便说一句，我不建议将实体作为 model 传递给视图。 请参阅以下文章：为什么在 MVC 中将实体作为模型传递不是一个好主意？