上传服务

try
            {
                HttpPostedFile file = HttpContext.Current.Request.Files["uploadfile"];
                if (file != null)
                {
                    //文件扩展类型判断
                    if (IsAllowedExtension(file))
                    {
                        string returnurl = UpLoad(file);

                        if (string.IsNullOrEmpty(returnurl))
                        {
                            context.Put("json", LitJson.JsonMapper.ToJson(new { code = 1, msg = "上传失败" }));
                        }
                        else
                        {
                            context.Put("json", LitJson.JsonMapper.ToJson(new { code = 0, data = returnurl }));
                        }

                    }
                    else
                    {
                        context.Put("json", LitJson.JsonMapper.ToJson(new { code = 1, msg = "文件格式不正确" }));
                    }
                }
                else
                {
                    context.Put("json", LitJson.JsonMapper.ToJson(new { code = 1, msg = "文件对象为null" }));
                }
                
            }
            catch (Exception e)
            {
                context.Put("json", LitJson.JsonMapper.ToJson(new { code = 1, msg = e.Message }));
            }

 private bool IsAllowedExtension(HttpPostedFile hifile)
        {
            bool ret = false;

            String newFile = System.Web.HttpContext.Current.Server.MapPath("~/" + System.Guid.NewGuid().ToString("D") + ".tmp");
            hifile.SaveAs(newFile);

            System.IO.FileStream fs = new System.IO.FileStream(newFile, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            System.IO.BinaryReader r = new System.IO.BinaryReader(fs);
            string fileclass = "";
            byte buffer;
            try
            {
                buffer = r.ReadByte();
                fileclass = buffer.ToString();
                buffer = r.ReadByte();
                fileclass += buffer.ToString();
            }
            catch
            {
                return false;
            }
            r.Close();
            fs.Close();
            /*文件扩展名说明
                         *7173        gif 
                         *255216      jpg
                         *13780       png
                         *6677        bmp
                         *239187      txt,aspx,asp,sql
                         *208207      xls.doc.ppt
                         *6063        xml
                         *6033        htm,html
                         *4742        js
                         *8075        xlsx,zip,pptx,mmap,zip
                         *8297        rar   
                         *01          accdb,mdb
                         *7790        exe,dll           
                         *5666        psd 
                         *255254      rdp 
                         *10056       bt种子 
                         *64101       bat 
                         * PDF = 3780,
            */

            String[] fileType = { "255216", "7173", "6677", "13780", "8297", "5549", "208207","8075","207208","3780" };

            for (int i = 0; i < fileType.Length; i++)
            {
                if (fileclass == fileType[i])
                {
                    ret = true;
                    break;
                }
            }
            System.IO.File.Delete(newFile);
            return ret;
        }

 

 protected string uploadFiles(HttpPostedFile userPostedFile)
        {
            string fileName, fileExtension;//文件名，文件类型
            fileName = System.IO.Path.GetFileName(userPostedFile.FileName);
            fileExtension = System.IO.Path.GetExtension(fileName).ToLower();
            int FileLen = userPostedFile.ContentLength;
            Byte[] FileData = new Byte[FileLen];
            Stream sr = userPostedFile.InputStream;//创建数据流对象 
            sr.Read(FileData, 0, FileLen);
            sr.Close();

            WebReference.PicUpload pu = new WebReference.PicUpload();
            //localhost.PicUpload pu = new localhost.PicUpload();

            string currentpath = "/upfiles/"; //这是上传后的图片路径
            //string filepath = Server.MapPath(currentpath); //文件夹名，以日期为文件夹名，图片所在这个地方
            string filepath = "D:\\dzt\\CommodityPic\\";
            //HttpPostedFile userPostedFile = Request.Files["File1"];
            if (FileLen > 0 && FileLen / 1024 < 8192)
            {
                string file_name = System.DateTime.Now.ToString("yyyyMMddHHmmssfff"); //新文件名
                string sPath = "MerchantPic"; //创建日期文件夹
                string file_ext = System.IO.Path.GetFileName(userPostedFile.FileName).Split('.')[1];
                string ext = userPostedFile.ContentType; //获取文件类型
                if (ext == "image/pjpeg" || ext == "image/jpeg" || ext == "image/png" || ext == "image/jpg")
                {
                    string sPath2 = filepath + sPath;
                    //if (!Directory.Exists(sPath2)) //判断日期文件夹是否存在
                    //{
                    //    Directory.CreateDirectory(sPath2);//创建日期文件夹
                    //}

                    string fpath = filepath + sPath + "\\" + file_name + "." + file_ext;
                    if (File.Exists(fpath))
                    {
                        file_name = file_name + "1";
                        fpath = filepath + sPath + "\\" + file_name + "." + file_ext;
                    }

                    string uploadpath = sPath + "/" + file_name + "." + file_ext;

                    bool result = pu.uploadFiles(FileData, FileLen, fpath, sPath2);
                    //userPostedFile.SaveAs(fpath);

                    if (result)
                    {
                        return uploadpath;
                    }
                    else
                    {
                        return "";
                    }
                }
                else
                {
                    return "1";
                }
            }
            else
            {
                return "2";
            }


            //string currentpath = "/upfiles/"; //这是上传后的图片路径
            ////string filepath = Server.MapPath(currentpath); //文件夹名，以日期为文件夹名，图片所在这个地方
            //string filepath = "E:\\dzt\\CommodityPic\\";
            ////HttpPostedFile userPostedFile = Request.Files["File1"];
            //if (userPostedFile.ContentLength / 1024 > 0 && userPostedFile.ContentLength / 1024 < 8192)
            //{
            //    string file_name = System.DateTime.Now.ToString("yyyyMMddHHmmssfff"); //新文件名
            //    string sPath = "MerchantPic"; //创建日期文件夹
            //    string file_ext = System.IO.Path.GetFileName(userPostedFile.FileName).Split('.')[1];
            //    string ext = userPostedFile.ContentType; //获取文件类型
            //    if (ext == "image/pjpeg" || ext == "image/jpeg" || ext == "image/png" || ext == "image/jpg")
            //    {
            //        string sPath2 = filepath + sPath;
            //        if (!Directory.Exists(sPath2)) //判断日期文件夹是否存在
            //        {
            //            Directory.CreateDirectory(sPath2);//创建日期文件夹
            //        }

            //        string fpath = filepath + sPath + "\\" + file_name + "." + file_ext;
            //        if (File.Exists(fpath))
            //        {
            //            file_name = file_name + "1";
            //            fpath = filepath + sPath + "\\" + file_name + "." + file_ext;
            //        }

            //        string uploadpath = sPath + "/" + file_name + "." + file_ext;
            //        userPostedFile.SaveAs(fpath);

            //        return uploadpath;
            //    }
            //    else
            //    {
            //        return "1";
            //    }
            //}
            //else
            //{
            //    return "2";
            //}

        }

 public bool uploadFiles(byte[] FileByteArray, int FileLength, string SaveToUrl,string sPath2)
        {
            try
            {
                if (!Directory.Exists(sPath2)) //判断日期文件夹是否存在
                {
                    Directory.CreateDirectory(sPath2);//创建日期文件夹
                }
                FileStream fs = new FileStream(SaveToUrl, FileMode.OpenOrCreate, FileAccess.Write);
                fs.Write(FileByteArray, 0, FileLength);
                fs.Close();
            }
            catch(Exception ex)
            {
                LogUtils.WriteLog(LogUtils.LogType.ERROR, ex.Message);
                return false;
            }
            return true;
        }