asp.net mvc+webuploader大文件分片上传

首先是前端：

 var GUID = WebUploader.Base.guid();//一个GUID
     uploadereditsVideo = WebUploader.create({
         // swf文件路径
         swf: '../../Scripts/plugins/webuploader/Uploader.swf',
         // 文件接收服务端。
         server: '/AjaxUpload/ChunkUpload',
         pick: {
             id: '#picker',
             label: '上传',
             innerHTML: '上传',
             multiple: false
         },
         fileNumLimit: 1,
         fileSingleSizeLimit: 1024 * 1024 *100,
         chunked: true,//开始分片上传
         chunkSize: 1024 * 1024 * 2,//每一片的大小
         formData: {
             guid: GUID //自定义参数
         }
     });

     uploadereditsVideo.on('fileQueued', function (file) {
         uploadereditsVideo.upload();
     });
     // 文件上传成功
     uploadereditsVideo.on('uploadSuccess', function (file, response) {
         //合并文件
         $.post('/AjaxUpload/Merge', { guid: GUID, fileName: file.name }, function (data) {
             if (data.r == 1) {
                 alert("上传完成");
             }
             else {
                 alert(data.err);
             }
         });
     });

后端接收方法Upload

 public ActionResult Upload()
         {
             //如果进行了分片
             if (Request.Form.AllKeys.Any(m => m == "chunk"))
             {
                 //取得chunk和chunks
                 int chunk = Convert.ToInt32(Request.Form["chunk"]);//当前分片在上传分片中的顺序（从0开始）
                 int chunks = Convert.ToInt32(Request.Form["chunks"]);//总分片数
                 //根据GUID创建用该GUID命名的临时文件夹
                 string folder = Server.MapPath("~/upload/" + Request["guid"] + "/");
                 string path = folder + chunk;

                 //建立临时传输文件夹
                 if (!Directory.Exists(Path.GetDirectoryName(folder)))
                 {
                     Directory.CreateDirectory(folder);
                 }

                 FileStream addFile = new FileStream(path, FileMode.Append, FileAccess.Write);
                 BinaryWriter AddWriter = new BinaryWriter(addFile);
                 //获得上传的分片数据流
                 var file = Request.Files[];
                 Stream stream = file.InputStream;

                 BinaryReader TempReader = new BinaryReader(stream);
                 //将上传的分片追加到临时文件末尾
                 AddWriter.Write(TempReader.ReadBytes((int)stream.Length));
                 //关闭BinaryReader文件阅读器
                 TempReader.Close();
                 stream.Close();
                 AddWriter.Close();
                 addFile.Close();

                 TempReader.Dispose();
                 stream.Dispose();
                 AddWriter.Dispose();
                 addFile.Dispose();
                 return Json(new { chunked = true, hasError = false, f_ext = Path.GetExtension(file.FileName) });
             }
             else//没有分片直接保存
             {
                 Request.Files[].SaveAs(Server.MapPath("~/upload/" + DateTime.Now.ToFileTime() + Path.GetExtension(Request.Files[].FileName)));
                 return Json(new { chunked = true, hasError = false });
             }
         }

合并方法Merge

public ActionResult Merge()
        {
            try
            {
                var guid = Request["guid"];//GUID
                var uploadDir = Server.MapPath("~/upload");//Upload 文件夹
                var dir = Path.Combine(uploadDir, guid);//临时文件夹
                var ext = Path.GetExtension(Request["fileName"]);
                var files = Directory.GetFiles(dir);//获得下面的所有文件
                var name = Guid.NewGuid().ToString("N") + ext;
                var finalPath = Path.Combine(uploadDir, name);//最终的文件名
                var fs = new FileStream(finalPath, FileMode.Create);
                foreach (var part in files.OrderBy(x => x.Length).ThenBy(x => x))//排一下序，保证从0-N Write
                {
                    var bytes = System.IO.File.ReadAllBytes(part);
                    fs.Write(bytes, , bytes.Length);
                    bytes = null;
                    System.IO.File.Delete(part);//删除分块
                }
                fs.Flush();
                fs.Close();
                Directory.Delete(dir);//删除文件夹
                return Json(new { r = , path = "/upload/" + name });
            }
            catch (Exception ex)
            {
                return Json(new { r = , err = ex.Message });
            }
        }

以上就是分片上传的方法