Question

我有一个应用程序，它应该在某些文本字段中显示来自本地数据库的对象列表，并可以选择编辑它们。代码在编辑时正确返回列表中的对象，但我的控制器没有看到任何更改。我尝试从Bitmap切换到IEnumerable无效。关于为什么会失败的任何想法（下面的代码）？

型号：

IList

控制器：

public class EmployeeProject
{
    [Required()]
    public Int32 EmployeeProjectID { get; set; }
    [Required()]
    [Range(0, 999999999, ErrorMessage = "Not a valid ID")]
    public Int32 EmployeeID { get; set; }
    [Required()]
    public Int32 ProjectID { get; set; }
    [Display(Name = "Name")]
    public string EmployeeName { get; set; }
    [Display(Name = "Project")]
    public string ProjectName { get; set; }
    [Range(0.0, 1.0, ErrorMessage = "Must be between 0 and 1")]
    public double Hour1 { get; set; }
    ....

    public EmployeeProject()
    {
        EmployeeID = 0;
        ProjectID = 0;
        Hour1 = 0;
        ....
    }
}

查看：

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit([Bind(Include = "EmployeeProjectID,EmployeeID,ProjectID,EmployeeName,ProjectName,Hour1,Hour2,Hour3,Hour4")] EmployeeProject employeeProject)
{
    if (ModelState.IsValid)
    {
        db.Entry(employeeProject).State = EntityState.Modified;
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(employeeProject);
}

Answer 1

奇怪的是，在你的action方法中，你将返回一个单独的实例 return View(employeeProject);而在您看来，您期待IEnumerable<employeeProject>因为

@model IEnumerable<WebApplication1.Models.EmployeeProject>

你怎么认为这无论如何都会起作用。你的模型应该只是

@model WebApplication1.Models.EmployeeProject

（OR）如果您确实需要，请更改您的操作方法以获取employeeProject

的列表

public ActionResult Edit(List<EmployeeProject> employeeProjects)
{

Answer 2

以下是我在其中一个项目中的表现

@model List<Game>
@using (Html.BeginForm(FormMethod.Post))
{
 @Html.AntiForgeryToken()
 @for (int i = 0; i < Model.OrderGames.Count(); i++)
 {
 <tr>  
    <td>@Html.EditorFor(m => m.OrderGames[i].GameId})</td>     
    <td>@Html.EditorFor(m => m.OrderGames[i].NumberOfPlayers})</td>
    <td>@Html.EditorFor(m => m.OrderGames[i].GameTime})</td>
    <td>@Html.EditorFor(m => m.OrderGames[i].Price})</td>                                           
</tr>                                    
}
}

您可以在这里翻译成您的项目。你的控制器应该是这样的

[Httppost]
public ActionResult Edit(List<Game> Games){}

ASP.Net MVC模型绑定IEnumerable失败

2 个答案: