Question

我有一个元素列表，我想编辑它。

我创建了这个代码段：

@{
    ViewBag.Title = "Liste des comptes administrateurs";

    Layout = "~/Views/Shared/_Layout.cshtml";
    int i = 0;
}

<hgroup class="title">
    <h1 style="color: darkcyan">@ViewBag.Title</h1>
</hgroup>

<section>
    <form>
        <table>
            <tr>
                <td><input type="radio" name="color" id="val" value="red" onclick="@i = 1;">Red</td>
            </tr>
            <tr>
                <td><input type="radio" name="color" value="blue" onclick="@i = 2;">Blue</td>
            </tr>
        </table>
    </form>     
</section>
<section style="margin-top: 30px">        
    <a type="button" href="@Url.Action( "Delete", "Super", new { Id = @i } )">Supprimer</a>
    <a type="button" href="@Url.Action( "Edit", "Super", new { Id = @i } )">Editer</a>
    <br />
    <br />
    <a href="@Url.Action( "Admin_Creation", "Super" )" style="color: blue; margin-left: 150px">Créer un nouveau compte</a>           
</section>

我的问题是，当我点击版本按钮时，i的值为0，即使我选中了其中一个单选按钮。它的值没有变化，总是为0。

为什么i的值没有改变？
如何解决此错误？

Answer 1

您可以使用FormCollection对象执行此操作。

public ActionResult SomeActionMethod(FormCollection formCollection)
{
  foreach (var key in formCollection.AllKeys)
  {
    var value = formCollection[key];
  }
// or 
var color=formCollection["color"];
}

Answer 2

您应该使用以下代码：

<强>型号：

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

namespace MvcDemo.Models
{
public class Color
{

        public int ID { get; set; }
        public Boolean Red { get; set; }
        public Boolean Blue { get; set; }


}
public class ColorContext : DbContext
{
    public DbSet<Color> Colors
    {
        get;
        set;

    }


}
}

查看：

@model MvcDemo.Models.Color <form action="" method="post" enctype="multipart/form-data"> <table > <tr> <td> @Html.RadioButtonFor(model=>model.Red,false); </td> </tr> <tr> <td> @Html.RadioButtonFor(model=>model.Blue,false); </td> </tr> </table> <input type="submit" name="btn" value="update" /> </form>

<强>控制器：

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using MvcDemo.Models; namespace MvcDemo.Controllers { public class ColorsController : Controller { // // GET: /Colors/ ColorContext cc = new ColorContext(); public ActionResult Index() { return View(); } [HttpPost, ActionName("update")] public ActionResult Update(int id,Boolean blue,Boolean red) { Color color = cc.Colors.Find(id); color.Blue = blue; color.Red = red; cc.SaveChanges(); return RedirectToAction("Index"); } } }

Answer 3

使用此代码：

@{
if(IsPost){
    int i;
    if(Request.Form["color"].Equals("red"))
      {
        i = 1;
      }
    else
      {
        i = 2; 
      }
   }
}

<hgroup class="title">
<h1 style="color:darkcyan">@ViewBag.Title</h1>
</hgroup>
<form action="" method="post" enctype="multipart/form-data">
 <table >
   <tr>
     <td>
       <input type="radio" name="color" id="val" value="red" >Red
     </td>
   </tr>
   <tr>
     <td>
       <input type="radio" name="color" value="blue" >Blue
     </td>
   </tr>
</table>
   <input type="submit" name="btn" value="update" />
</form>
...

在Razor视图中获取/设置整数的值

3 个答案: