用Fine Uploader+ASP.NET MVC实现ajax文件上传[代码示例]

This project attempts to achieve a user-friendly file-uploading experience over the web. It's built as a Javascript plugin for developers looking to incorporate file-uploading into their website.

Fine Uploader 不依赖于 jQuery，也就是说不引用jquery.js，也可以正常使用。同时，它也提供了 jQuery Wrapper，可以方便地与jQuery集成。
这篇博文中的示例代码用的就是 Fine Uploader jQuery Wrapper。下面看示例代码：

Web前端实现

1. 下载jQuery Plug-in Fine Uploader，下载地址：https://github.com/valums/file-uploader/wiki/Releases
我们Fine Uploader下载地址 http://www.jb51.net/codes/70040.html
2. html代码：


代码如下:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>图片上传 - 博客园</title>
<link href="/css/fineuploader.css" rel="stylesheet">
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script src="/scripts/jquery.fineuploader-3.0.min.js"></script>
</head>
<body>
<div id="jquery-wrapped-fine-uploader"></div>
<script>
$(function () {
$('#jquery-wrapped-fine-uploader').fineUploader({
request: {
endpoint: '/ImageUploader/ProcessUpload'
}
});
});
</script>
</body>
</html>

代码说明：
a) <div id="jquery-wrapped-fine-uploader"></div>用于显示上传按钮
b) endpoint 设定的是上传时服务端处理ajax请求的网址。
3. 浏览器中的显示效果

服务器 ASP.NET MVC 实现代码
Fine Uploader 的源代码中用 VB.NET 实现了一个 Controller（UploadController.vb），我们在使用时改为了 C# 代码：


代码如下:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace CNBlogs.Upload.Web.Controllers
{
public class ImageUploaderController : Controller
{
const int ChunkSize = 1024 * 1024;
public ActionResult Upload()
{
return View();
}
public ActionResult ProcessUpload(string qqfile)
{
using (var stream = Request.InputStream)
{
using (var br = new BinaryReader(stream))
{
WriteStream(br, qqfile);
}
}
return Json(new { success = true });
}
private void WriteStream(BinaryReader br, string fileName)
{
byte[] fileContents = new byte[] { };
var buffer = new byte[ChunkSize];
while (br.BaseStream.Position < br.BaseStream.Length - 1)
{
if (br.Read(buffer, 0, ChunkSize) > 0)
{
fileContents = fileContents.Concat(buffer).ToArray();
}
}
using (var fs = new FileStream(@"C:\\temp\\" + DateTime.Now.ToString("yyyyMMddHHmmSS") +
Path.GetExtension(fileName).ToLower(), FileMode.Create))
{
using (var bw = new BinaryWriter(fs))
{
bw.Write(fileContents);
}
}
}
}
}

服务器端实现改进版


代码如下:

public ActionResult ProcessUpload(string qqfile)
{
using (var inputStream = Request.InputStream)
{
using (var flieStream = new FileStream(@"c:\temp\" + qqfile, FileMode.Create))
{
inputStream.CopyTo(flieStream);
}
}
return Json(new { success = true });
}

图片上传结果演示