@{
ViewBag.Title = "Home Page";
}
<!DOCTYPE HTML PUBLIC>
<html>
<head>
<meta charset="utf-8">
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<title>使用html5 FileReader获取图片，并异步上传到服务器(not iframe)</title>
<style type="text/css">
body {
margin: 0px;
background: #f2f2f0;
}
p {
margin: 0px;
}
.title {
color: #FFFF00;
background: #000000;
text-align: center;
font-size: 24px;
line-height: 50px;
font-weight: bold;
}
.file {
position: absolute;
width: 100%;
font-size: 90px;
}
.filebtn {
display: block;
position: relative;
height: 110px;
color: #FFFFFF;
background: #06980e;
font-size: 48px;
line-height: 110px;
text-align: center;
cursor: pointer;
border: 3px solid #cccccc;
}
.filebtn:hover {
background: #04bc0d;
}
.showimg {
margin: 10px auto 10px auto;
text-align: center;
}
</style>
<script type="text/javascript">
window.onload = function () {
// 选择图片
document.getElementById(‘img‘).onchange = function (event) {
var img = event.target.files[0];
// 判断是否图片
if (!img) {
return;
}
// 判断图片格式
if (!(img.type.indexOf(‘image‘) == 0 && img.type && /\.(?:jpg|png|gif)$/.test(img.name))) {
alert(‘图片只能是jpg,gif,png‘);
return;
}
var reader = new FileReader();
reader.readAsDataURL(img);
console.log(3434);
reader.onload = function (e) { // reader onload start
// ajax 上传图片
$.post("@Url.Content("~/Home/SaveFile")", { img: e.target.result }, function (ret) {
console.log(ret.Path);
alert(ret.Path);
$(‘#showimg‘).html(‘<img src="‘ + ret.Path + ‘">‘);
alert(ret);
}, ‘json‘);
} // reader onload end
}
}
</script>
</head>
<body>
<p class="title">使用html5 FileReader获取图片，并异步上传到服务器(not iframe)</p>
<p><input type="file" class="file" id="img"><label class="filebtn" for="img" title="JPG,GIF,PNG">请选择图片</label></p>
<div style="height:400px;"></div>
<div class="showimg" id="showimg" style="border:solid 1px red;"></div>
</body>
</html>
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
using Html5Image.Tools;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace Html5Image.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public JsonResult SaveFile( string img)
{
int pos = img.IndexOf("base64,");
if(pos >= 0)
{
img = img.Substring(pos + 7);
}
string file = "UploadedImage\\testimg.jpg";
string path = Path.Combine(HttpRuntime.AppDomainAppPath, file);
ImageTool.SaveFile(img, path, System.Drawing.Imaging.ImageFormat.Jpeg);
var obj = new { Path= Url.Content("~/" + file) };
return Json(obj);
//return "233";
}
public ActionResult About()
{
ViewBag.Message = "Your application description page.";
return View();
}
public ActionResult Contact()
{
ViewBag.Message = "Your contact page.";
return View();
}
}
}
原文：http://www.cnblogs.com/zhang-Y/p/6050316.html