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