用vs新建项目WebUploaderDemo

引入webuploader

C#代码如下：

/// <summary>

    /// Upload 的摘要说明

    /// </summary>

    public class Upload : IHttpHandler

    {

        const string path = "/upfiles/";//上传目录

        const string tempPath = "/upfiles/temp/";//上传临时目录

        public void ProcessRequest(HttpContext context)

        {

            context.Response.ContentType = "text/plain";

            //如果进行了分片

            if (context.Request.Form.AllKeys.Any(m => m == "chunk"))

            {

                //取得chunk和chunks

                int chunk = Convert.ToInt32(context.Request.Form["chunk"]);//当前分片在上传分片中的顺序（从0开始）

                int chunks = Convert.ToInt32(context.Request.Form["chunks"]);//总分片数

                if (string.IsNullOrEmpty(context.Request["guid"]))

                    throw new Exception("[guid]不能为空");

                //根据GUID创建用该GUID命名的临时文件夹

                string folder = context.Server.MapPath(tempPath + context.Request["guid"] + "/");

                string tempFile = folder + chunk;

                //建立临时传输文件夹

                if (!Directory.Exists(Path.GetDirectoryName(folder)))

                {

                    Directory.CreateDirectory(folder);

                }

                FileStream addFile = new FileStream(tempFile, FileMode.Append, FileAccess.Write);

                BinaryWriter AddWriter = new BinaryWriter(addFile);

                //获得上传的分片数据流

                HttpPostedFile file = context.Request.Files[0];

                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();

                string filePath = "";

                if (chunk == chunks - 1)

                {

                    filePath = path + DateTime.Now.ToString("yyyy/MM/") + Guid.NewGuid() + Path.GetExtension(file.FileName);//合并后的文件

                    ProcessRequest(folder, context.Server.MapPath(filePath));

                }

                context.Response.Write("{\"chunked\" : true, \"hasError\" : false, \"filePath\" : \"" + filePath + "\"}");

            }

            else//没有分片直接保存

            {

                string filePath = path + DateTime.Now.ToString("yyyy/MM/") + Guid.NewGuid() + Path.GetExtension(context.Request.Files[0].FileName);//合并后的文件

                context.Request.Files[0].SaveAs(context.Server.MapPath(filePath));

                context.Response.Write("{\"chunked\" : true, \"hasError\" : false, \"filePath\" : \"" + filePath + "\"}");

            }

        }

        /// <summary>

        /// 合并文件

        /// </summary>

        /// <param name="sourcePath">源数据文件夹</param>

        /// <param name="filePath">合并后的文件</param>

        private void ProcessRequest(string sourcePath, string filePath)

        {

            if (!Directory.Exists(Path.GetDirectoryName(filePath)))

            {

                Directory.CreateDirectory(Path.GetDirectoryName(filePath));

            }

            DirectoryInfo dicInfo = new DirectoryInfo(sourcePath);

            if (Directory.Exists(Path.GetDirectoryName(sourcePath)))

            {

                FileInfo[] files = dicInfo.GetFiles();

                foreach (FileInfo file in files.OrderBy(f => int.Parse(f.Name)))

                {

                    FileStream addFile = new FileStream(filePath, FileMode.Append, FileAccess.Write);

                    BinaryWriter AddWriter = new BinaryWriter(addFile);

                    //获得上传的分片数据流

                    Stream stream = file.Open(FileMode.Open);

                    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();

                }

                Directory.Delete(sourcePath, true);

            }

        }

        /// <summary>

        /// 删除文件夹

        /// </summary>

        /// <param name="strPath"></param>

        private static void DeleteFolder(string strPath)

        {

            if (Directory.GetDirectories(strPath).Length > 0)

            {

                foreach (string fl in Directory.GetDirectories(strPath))

                {

                    Directory.Delete(fl, true);

                }

            }

            //删除这个目录下的所有文件

            if (Directory.GetFiles(strPath).Length > 0)

            {

                foreach (string f in Directory.GetFiles(strPath))

                {

                    System.IO.File.Delete(f);

                }

            }

        }