MVC C# 会话项目

Question

我已经发布了这个问题，但没有人回答我遇到的 cmets/错误。如何使用会话变量在我的索引视图中获取在 @Html.TextBox("SearchString") 中输入的文本以欢迎视图？

HomeController.Cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data.Entity;
using Newproject.Models;

namespace Newproject.Controllers
{
 public class HomeController : Controller
  {
    public ActionResult Index()
    {
        return View();
    }
    [HttpPost]
    public ActionResult Gender(WelcomeVm model)

    {
        model.Genders = new List<SelectListItem>
   {
     new SelectListItem { Value="Male", Text="Male"},
     new SelectListItem { Value="Female", Text="Female"}
    };
        return View(model);
    }
    [HttpPost]
    public ActionResult Welcome(WelcomeVm model)
     {
       return View(model);
     }
    public object Final { get; set; }
 }
 }

索引.cshtml

@{
ViewBag.Title = "Welcome";
}

<br />
@Html.Label("Name")
<br />
@using (Html.BeginForm("Gender", "Home", FormMethod.Post))
{
@Html.TextBox("Name");
<input id="btnSubmit" name="btnSubmit" placeholder="test" type="submit" value="Submit" />
}

性别.cs

using System.Collections.Generic;
using System.Web.Mvc;
public class WelcomeVm
{
public string Name { set; get; }
public string Gender { set; get; }
public IEnumerable<SelectListItem> Genders { set; get; }
}

性别.cshtml

@model WelcomeVm
@using (Html.BeginForm("Welcome", "Home", FormMethod.Post))
{
<p>Hello @Model.Name what is your gender</p>
@Html.DropDownListFor(m => m.Gender, Model.Genders)
@Html.HiddenFor(s => s.Name)
<input type="submit" />
}

Welcome.cshtml

@{
ViewBag.Title = "Welcome";
}

@model WelcomeVm
<p>Hello @Model.Name who is a @Model.Gender</p>

Answer 1

您不需要 Session 或 ViewBag 来传递数据。您可以简单地使用现有的视图模型。

所以在你的索引视图中，

@Html.Label("Name")  
@using (Html.BeginForm("Gender", "Home"))
{
  @Html.TextBox("Name");
  <input id="btnSubmit" name="btnSubmit" type="submit"    value="Submit" />
}

并且在您的Gender 操作方法中使用与您的参数类型相同的视图模型。当表单发布时，默认模型绑定器会将发布的表单值映射到 WelcomeVm 类的对象。

[HttpPost]
public ActionResult Gender(WelcomeVm model)
{
   model.Genders = new List<SelectListItem>
   {
         new SelectListItem { Value="Male", Text="Male"},
         new SelectListItem { Value="Female", Text="Female"}
   };
   return View(model);
}

在Gender.cshtml 视图中，该视图再次被强类型化到同一视图模型。

@model WelcomeVm
@using (Html.BeginForm("Welcome", "Home", FormMethod.Post))
{
  <p>Hello @Model.Name what is your gender</p>
  @Html.DropDownListFor(m => m.Gender, Model.Genders)
  @Html.HiddenFor(s=>s.Name)
  <input type="submit" />
}

在欢迎操作中

[HttpPost]
public ActionResult Welcome(WelcomeVm model)
{
  return View(model);
}

在 Welcome.cshtml 视图中，它再次被强类型化到您的视图模型中，

@model WelcomeVm
<p>Hello @SearchString who is a @Model.Gender</p>