Asp.Net.Core 5 传值 (控制器->界面)

传值5种方式

1，ViewBag

2，ViewData

3，TempData

4，Model

5，Session

控制器代码

 public IActionResult Index()
        {
            base.ViewBag.UserName = "李潇潇";
            base.ViewData["UserName"] = "王萌萌";
            base.TempData["UerName"] = "彭晓晓";

            User user = new() { Id = 1, Name = "吴思思", Email = "123@163.com" };
            return View(user);
        }

Index.cshtml代码

@model AspNetCore5Demo.Models.User
@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1>ViewBag传值</h1>
    <h2>UserName：@ViewBag.UserName</h2>
    <h1>ViewData传值</h1>
    <h2>UserName：@ViewData["UserName"]</h2>
    <h1>TempData传值</h1>
    <h2>UserName：@TempData["UerName"]</h2>

    <hr />
    <h1>Model传值</h1>
    <h2>Id:@Model.Id</h2>
    <h2>Name:@Model.Name</h2>
    <h2>Email:@Model.Email</h2>
</div>

界面显示效果

Session传值

1，Startup.cs文件中增加配置

方法-ConfigureServices 添加代码

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddSession();//添加Session
            services.AddControllersWithViews();
        }

2，方法-Configure 添加代码

 app.UseSession();

3，控制器代码

    a，需要添加引用：using Microsoft.AspNetCore.Http;

    b，获取值：HttpContext.Session.GetString("UserNameSession");

    c，设置值：HttpContext.Session.SetString("UserNameSession", "刘晴晴");

 public IActionResult Index()
        {
            base.ViewBag.UserName = "李潇潇";
            base.ViewData["UserName"] = "王萌萌";
            base.TempData["UerName"] = "彭晓晓";
            User user = new() { Id = 1, Name = "吴思思", Email = "123@163.com" };

            //获取Session值，判断若为null则设置Session值
           var sUserName= HttpContext.Session.GetString("UserNameSession");
            if (sUserName == null)
                HttpContext.Session.SetString("UserNameSession", "刘晴晴");

            return View(user);
        }

4,index.cshtml代码

      a，引入 @using Microsoft.AspNetCore.Http

      b，获取值  @Context.Session.GetString("UserNameSession")

@model AspNetCore5Demo.Models.User
@using Microsoft.AspNetCore.Http
@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1>ViewBag传值</h1>
    <h2>UserName：@ViewBag.UserName</h2>
    <h1>ViewData传值</h1>
    <h2>UserName：@ViewData["UserName"]</h2>
    <h1>TempData传值</h1>
    <h2>UserName：@TempData["UerName"]</h2>

    <hr />
    <h1>Model传值</h1>
    <h2>Id:@Model.Id</h2>
    <h2>Name:@Model.Name</h2>
    <h2>Email:@Model.Email</h2>

    <!--获取Session值-->
    <h1>Session</h1>
    <h2>
        @Context.Session.GetString("UserNameSession")
    </h2>
</div>