在Razor视图中获取/设置整数的值

本文关键字：设置 整数 获取 Razor 视图 | 更新日期: 2023-09-27 18:14:00

我有一个元素列表，我想编辑它。

我创建了这个代码片段:

@{
    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，当我点击编辑按钮时，i的值是0，即使我检查了其中一个单选按钮。它的值不变，始终为0。

  • 为什么i的值没有变化?
  • 如何修复此错误?

在Razor视图中获取/设置整数的值

可以通过FormCollection对象来实现。

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

您应该使用如下代码:

模型: 

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;
    }

}
}

视图:

@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>

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");
    }
}
}

使用以下代码:

@{
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>
...
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