[转]asp.net mvc3 简单的文件上传下载

web.config配置

<add name="连接字符串" connectionString="data source=服务器名;Initial Catalog=数据库;Persist Security Info=True;User ID=用户名;Password=密码" providerName="System.Data.SqlClient" />

建立数据库、表就省略了····

1.建立模型文件FileStores.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace UpLoadFile.Models
{
[Table("FileStore")]　　　　　　//　　　　关联表用
public class FileStore
{
public int ID { get; set; }
[DisplayName("文件类型")]
public string MimeType { get; set; }
[DisplayName("文件名")]
public string FileName { get; set; }
[DisplayName("文件路径")]
public string FileUrl { get; set; }
}
}

2.新建文件DbConnect.cs 建立数据库链接用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace UpLoadFile.Models
{
public class DbConnect : DbContext
{
public DbConnect(string connecting) : base(connecting) { }

public DbSet<FileStore> FileStores { get; set; }
}
}

3.建立控制器UploadController.cs，以下是代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.IO;
using UpLoadFile.Models;

namespace UpLoadFile.Controllers
{
public class UploadController : Controller
{
DbConnect db = new DbConnect("FileConnector");//数据库链接，FileConnector为web.config的链接字符串
public ActionResult Index()
{
return View();
}

　　　//文件上传
public ActionResult Upload()
{
foreach (string upload in Request.Files)
{
if (!HasFiles.HasFile(Request.Files[upload])) continue;

string miniType = Request.Files[upload].ContentType;
Stream fileStream = Request.Files[upload].InputStream;
string path = AppDomain.CurrentDomain.BaseDirectory + "files\\";
string filename = Path.GetFileName(Request.Files[upload].FileName);
Request.Files[upload].SaveAs(Path.Combine(path, filename));

var files = new FileStore()
{
MimeType = miniType,
FileName = filename,
FileUrl = Path.Combine(path, filename)
};
db.FileStores.Add(files);//存储到数据库
db.SaveChanges();
}
return RedirectToAction("List");
}

　　　//下载列表页
public ActionResult List()
{
var list = db.FileStores.ToList();
return View(list);
}

　　　//文件下载
public FilePathResult Download(int id)
{
var fileinfo = db.FileStores.Find(id);
return File(fileinfo.FileUrl, fileinfo.MimeType, fileinfo.FileName);
}
}

public static class HasFiles
{
public static bool HasFile(this HttpPostedFileBase file)
{
return (file != null && file.ContentLength > 0) ? true : false;
}
}

}

4.视图文件

index.cshtml

@model UpLoadFile.Models.FileStore
@{
ViewBag.Title = "上传文件";
}

<h2>上传文件</h2>
@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, new { enctype = "multipart/form-data" }))
{

　　//使用此控件会限制文件大小最大上传4m

　　　　可在web.config中配置<httpRuntime
executionTimeout= "5400 "
maxRequestLength= "2048000 " 文件大小
useFullyQualifiedRedirectUrl= "false "
/>
<div id="files">
<input type="file" name="FileUpload" />
</div>
<input type="button" id="add" value="增加" />
<input type="submit" name="Submit" id="Submit" value="上传" />
}
<script type="text/javascript">
var n = 1;
$("#add").click(function () {
var filename = "FileUpload" + n;
$("#files").append("<input type=\"file\" name=\""+filename+"\" />");
n++;
});
</script>

其他页面自己建立，

下载<a href="@Url.Action("Download", new { id=Model.ID})">@Model.FileName</a>