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

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Fine Uploader（http://fineuploader.com/）是一个实现 ajax 上传文件的 Javascript 组件

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
Fine Uploader下载地址 https://www.jb51.net/codes/70040.html
2. html代码：

复制代码代码如下:

 
<!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：

复制代码代码如下:

 
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

复制代码代码如下:

 
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