Question

我是Asp.net MVC和Razor的新手。我想使用Razor显示从DB到文本字段值的值。我在控制器

中有以下代码

public ActionResult edit(int id) 
    {

        using (var context = new pmcontext())
        {



          var user_1 = from u in context.Users
                            where u.UserID==11
                            select u;           
              ViewBag.users = user_1.ToList();

            return View();

       }
}

在视图中我有

 @model pm.Models.User
 @{
     ViewBag.Title = "edit";
 }

 <h2>Update User</h2>
 @foreach (var user in ViewBag.Users)
 {
      <p><b> User Full Name: @user.fullname </b></p>
      using (Html.BeginForm("Update", "Users", FormMethod.Post))
      {


 <div class="row">
    <div class="col-sm-6 col-xs-6">Name </div>
    <div class="col-sm-6 col-xs-6">@Html.TextBoxFor(model => model.fullname, new { Class = "form-control", value=user.fullname }) </div>
</div>

      }
   }

我还试图在文本框中显示user.fullname值，但未能这样做。

 @Html.TextBoxFor(model => model.fullname, new { Class = "form-control", value="@user.fullname" })

Answer 1

你的控制器应该是：

using (var context = new pmcontext())
{
   //here how you can pass strongly typed model to View
   ViewData.Model = context.Users.Where(x => x.UserID == 11).ToList();
   return View();
}

然后在您的视图中更改您的模型：

 @model IList<pm.Models.User> @*this is your actual model*@
 @{
     ViewBag.Title = "edit";
 }

 <h2>Update User</h2>
 @foreach (var user in Model)
 {
      <p><b> User Full Name: @user.fullname </b></p>
      using (Html.BeginForm("Update", "Users", FormMethod.Post))
      {


 <div class="row">
    <div class="col-sm-6 col-xs-6">Name </div>
    <div class="col-sm-6 col-xs-6">@Html.TextBoxFor(model => model.fullname, new { @class = "form-control"}) </div>
</div>

      }
   }

我更改了模型，在class中转义htmlAttrubutes并删除value=user.fullname您不需要它，因为TextBoxFor从您的模型属性中获取此值。< / p>

但请注意，通过这种方式，您将破坏绑定，并且不允许您以正确的方式POST建模。

使一切正确的简单方法是使用for循环而不是foreach：

 @for (int i = 0; i < Model.Count(); i++)
 {
      <p><b> User Full Name: @Model[i].fullname </b></p>
      using (Html.BeginForm("Update", "Users", FormMethod.Post))
      {


 <div class="row">
    <div class="col-sm-6 col-xs-6">Name </div>
    <div class="col-sm-6 col-xs-6">@Html.TextBoxFor(model => Model[i].fullname, new { @class = "form-control"}) </div>
</div>

      }
   }

这将为您的name生成正确的input属性，并且绑定将在POST上正常工作。

Answer 2

在控制器中

public ActionResult edit(int id) 
    {

        using (var context = new pmcontext())
        {

          List<User> user_1= context.Users.where(x=>x.UserID==1).ToList();

          return View(user_1);

       }
}

Answer 3

public ActionResult edit（int id） {

        using (var context = new pmcontext())
        {



            var user_1 = (from u in context.Users
                         where u.UserID == 11
                         select u).ToList();
            ViewBag.users = user_1;
            //make your Model type class object 
            User model = new User();
            model.fullname = user_1.fullname;

            ///Pass  your Model type class object On View.
            return View(model);

        }


    }

从Db获取值并设置为@ Html.TextBoxFor（）Razor Asp.net

3 个答案: