MVC异步上传图片到本地/服务器

这两天朋友问我，有没有异步上传图片到本地/服务器这种demo，他有用， 我就想，好吧， 那刚好周末了，整理一套出来。

主要用到的是jquery uploadify 这个juqery的插件 ，可以无刷新，直接后台上传返回地址

下面先看前台的代码：

@{
ViewBag.Title = "Demo";
Layout = "~/Views/Shared/_Layout.cshtml";
}

@section styles{
<link href="~/Content/uploadify.css" rel="stylesheet" />
}

<h2>Demo</h2>

<h2>实例</h2>
<div class="form-group">
<input class="form-control" type="file" id="PickImage" name="PickImage" value="浏览图片" />
</div>

<div class="form-group">
<img class="img-rounded" id="Rimg" width="200" height="200"/>
</div>

@section scripts{
<script src="~/Scripts/jquery.uploadify.min.js"></script>
<script>
jQuery(function () {
$('#PickImage').uploadify({
'swf': '/Content/uploadify.swf', 'buttonText': '选择图片并上传',
'uploader': '@Url.Action("UploadImage","Demo")',
'fileTypeDesc': '图片类型',
'fileTypeExts': '*.jpg;*.jpeg;*.png',
"formData": { "folder": "/product/" },
onUploadSuccess: function (localFileObject, serverData, receivedResponse) {
console.log(serverData)
if (typeof (serverData) == "string")
serverData = JSON.parse(serverData);
$("#HeadImgurl").val(serverData.ImagePath);
$("#Rimg").attr("src", serverData.ImagePath);
},
onUploadComplete: function (fileObj) {
}
});

});
</script>
}

后台的代码也很简单：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Demo_UploadImageToServer.Controllers
{
public class DemoController : Controller
{
// GET: Demo
public ActionResult Demo()
{
return View();
}

#region 帮助方法
//图片异步上传
public ActionResult UploadImage()
{
Response.ContentType = "text/plain";
Response.Charset = "utf-8";

HttpPostedFileBase file = Request.Files["Filedata"];
string path = ConfigurationManager.AppSettings["Domain"].ToString(); //填写服务器域名
string basePath = "/UploadPic/";
string uploadPath = Server.MapPath(basePath); //本地路径
if (file != null)
{
if (!Directory.Exists(uploadPath))
{
Directory.CreateDirectory(uploadPath);
}
string fileName = file.FileName;
string ext = fileName.Substring(fileName.LastIndexOf("."));
fileName = DateTime.Now.Ticks + ext;
file.SaveAs(uploadPath + fileName);

//服务器上传
//return Json(new { ImagePath = string.Format("{0}{1}{2}", path, basePath, fileName) });

//本地上传
return Json(new { ImagePath = string.Format("{0}{1}", basePath, fileName) });
}
else
{
return Json(new { error = 0 });
}
}
#endregion
}
}