表单提交

新建一个文件夹upload

创建一个类Model

public class Student
    {
        public int Id { get; set; }
        [Display(Name = "姓名")]
        public string Name { get; set; }
        public string SClass { get; set; }
        public string IconPath { get; set; }

    }

数据上下文类

    public class Context:DbContext
    {
        public DbSet<Student> Students { get; set; }
    }

创建一个控制器

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication3.Models;

namespace MvcApplication3.Controllers
{
    public class HomeController : Controller
    {
        Context db = new Context();
        public ActionResult Index()
        {
            return View();
        }
        public ActionResult UploadIcon()
        {
            return View();
        }
        //
        // GET: /Home/
        [HttpPost]
        public ActionResult UploadIcon(HttpPostedFileBase file)
        {
            if (file == null)
            {
                return Content("没有文件！", "text/plain");
            }
            var fileName = Path.Combine(Request.MapPath("~/Upload"), Path.GetFileName(file.FileName));
            try
            {
                file.SaveAs(fileName);
                var stu = db.Students.Find(1);
                stu.IconPath = "/upload/" + Path.GetFileName(file.FileName);
                db.Entry(stu).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("ShowStudent", new { id = 1 });
            }
            catch
            {
                return Content("上传异常！", "text/plain");
            }
        }
       
        public ActionResult ShowStudent(int id)
        {
            var stu = db.Students.Find(id);
            return View(stu);
        }

    }
}

Index视图

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

@Html.ActionLink("上传头像", "UploadIcon");

ShowStudent视图

 

@model MvcApplication3.Models.Student

 

@{
    ViewBag.Title = "ShowStudent";
}

 

<h2>ShowStudent</h2>

 

<fieldset>
    <legend>Student</legend>

 

    <div class="display-label">
         @Html.DisplayNameFor(model => model.Name)
    </div>
    <div class="display-field">
        @Html.DisplayFor(model => model.Name)
    </div>

 

    <div class="display-label">
         @Html.DisplayNameFor(model => model.SClass)
    </div>
    <div class="display-field">
        @Html.DisplayFor(model => model.SClass)
    </div>
        <div class="display-label">
         @Html.DisplayNameFor(model => model.IconPath)
    </div>
    <div class="display-label">
        <img src="@Model.IconPath"/>
    </div>
</fieldset>
<p>
    @Html.ActionLink("Edit", "Edit", new { id=Model.Id }) |
    @Html.ActionLink("Back to List", "Index")
</p>

UploadIcon视图

@{
    ViewBag.Title = "UploadIcon";
}

<h2>UploadIcon</h2>

@using(Html.BeginForm("UploadIcon","Home",FormMethod.Post,new{enctype="multipart/form-data"}))
{
    @Html.TextBox("file","",new{type="file",size="25"})
    <input type="submit"/>
}