在cshtml.cs

Question

我尝试在我的代码中使用以下输入标签帮助程序示例，但它不起作用。 https://docs.microsoft.com/de-de/aspnet/core/mvc/views/working-with-forms?view=aspnetcore-2.2 https://www.learnrazorpages.com/razor-pages/tag-helpers/input-tag-helper

我想使用对象列表显示在表中并从输入中读取值。显示数据有效，但不读取输入。

cshtml

@page
@{
    var days2 = @Model.days;

}
<form class="form-horizontal" method="post">
    <button asp-page-handler="Go" type="submit" class="btn btn-default">Go</button>
    <table class="table">
        <thead>
            <tr>
                <th>@Html.DisplayNameFor(m => m.days[0].Name)</th>
                <th>@Html.DisplayNameFor(m => m.days[0].Beginn)</th>
                ........
            </tr>
        </thead>
        <tbody>
            @for (int i =0; i< days2.Count; i++)
            {
                <tr>
                    <td><input asp-for="@days2[i].Name" class="form-control" value=Tag.Name /></td>
                    <td><input asp-for="@days2[i].Beginn" class="form-control" value=Tag.Beginn /></td>
                    .....               
                </tr>
            }
        </tbody>


    </table>
</form>

cshtml.cs

[BindProperty]
public List<day> days { get; set; }

public void OnGet()
{
  days=getdaysvalue();
}

public void OnPostGo()
{
  for (int i = 0; i < Tage.Count; i++)
  {
    days[i].Name = days2[i].Name;  //days2 is in the actuell context not given
    days[i].Beginn = days2[i].Beginn;
  }

days2在actuell上下文中未提供

Answer 1

您在视图中有几个具有相同名称和ID的属性，最后它只读取其中一个属性的值。

您可以尝试

           @for (int i =0; i< days2.Count; i++)
            {
                <tr>
                    <td><input id="Name_@i" type="text" name="Name" class="form-control" value="@Tag.Name" /></td>
                    <td><input id="Beginn_@i" type="text" name="Beginn" class="form-control" value="@Tag.Beginn" /></td>
                    .....               
                </tr>
            }

和在RazorPage中

public void OnPostGo(List<string> Name,List<string> Beginn)
{
  for (int i = 0; i < Tage.Count; i++)
  {
    days[i].Name = Name[i]; 
    days[i].Beginn = Beginn[i];
  }
}

Answer 2

对于Razor Page，它有助于将模型与[BindProperty] public List<day> days { get; set; }绑定，您应该尝试通过days而不是view中的变量来访问提交模型。

尝试：

1. PageModel

   public class TestModel : PageModel
   {
       [BindProperty]
       public List<day> days { get; set; }
   
       public void OnGet()
       {
           days = new List<day> {
               new day{ Name = "D1", Beginn = "B1"},
               new day{ Name = "D2", Beginn = "B2"},
               new day{ Name = "D3", Beginn = "B3"},
           };
       }
   
       public void OnPostGo()
       {
           var result = days;
       }
   }
   

2. 查看

   @page
   @model CoreRazor.Pages.Books.TestModel
   @{
       ViewData["Title"] = "Test";
   }
   
   <h1>Test</h1>
   
   <form class="form-horizontal" method="post">
       <button asp-page-handler="Go" type="submit" class="btn btn-default">Go</button>
       <table class="table">
           <thead>
               <tr>
                   <th>@Html.DisplayNameFor(m => m.days[0].Name)</th>
                   <th>@Html.DisplayNameFor(m => m.days[0].Beginn)</th>
                   ........
               </tr>
           </thead>
           <tbody>
               @for (int i = 0; i < Model.days.Count; i++)
               {
                   <tr>
                       <td><input asp-for="@Model.days[i].Name" class="form-control" /></td>
                       <td><input asp-for="@Model.days[i].Beginn" class="form-control" /></td>
                   </tr>
               }
           </tbody>
       </table>
   </form>