ImportFileHandler 附件上传

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using LitJson;
 using LY.CCPC.Model;
 using System.IO;
 using System.Reflection;
 using System.Data;
 using System.Configuration;
 using System.Collections.Specialized;
 using LY.CCPC.BLL;
 using LY.CCPCUEP.Utility;

 namespace LY.CCPCUEP.UI.Handlers
 {
     /// <summary>
     /// ImportFileHandler 的摘要说明
     /// </summary>
     public class ImportFileHandler : IHttpHandler
     {
         public void ProcessRequest(HttpContext context)
         {
             JsonObject json = new JsonObject() { Success = true };

             string fullMethod = context.Request.QueryString["mod"];
             string strType = context.Request.QueryString["type"];
             string fullFileName = string.Empty;
             FTPHelper ftp=getFtpPath();
             try
             {
                 HttpFileCollection fileColl = context.Request.Files;
                 string empid = context.User.Identity.Name;
                 if ("UPLOAD".Equals(fullMethod.ToUpper()))
                 {
                     HttpPostedFile file = fileColl[];//得到上传的文件

                     //1.判断文件扩展名是否符合要求
                     string org_file_name = getOrgFileName(file.FileName);//初始文件名
                     string ext = getFileExtName(file.FileName);
                     ext = ext.ToLower();
                     string[] exts = new string[] { ".jpg", ".ppt", ".pptx", ".bmp", ".gif", ".png", ".jpeg", ".txt", ".csv", ".xls", ".xlsx", ".doc", ".docx", ".pdf", ".avi ", ".rmvb ", ".rm ", ".asf ", ".divx ", ".mpg ", ".mpeg ", ".mpe ", ".wmv ", ".mp4 ", ".mkv ", ".vob", ".rar", ".zip" };
                     if (!exts.Contains(ext))
                     {
                         json.Success = false;
                         json.Data = "";
                         json.Message = string.Format("系统不允许上传类型为{0}的文件，请重新选择上传！", ext);
                         // context.Response.Write(JsonMapper.ToJson(json));
                         return;
                     }

                     //2.判断文件大小，不能超过5MB
                     int fileSize = file.ContentLength;
                     const int MB =  * ;

                     if (fileSize / MB >= )
                     {
                         json.Success = false;
                         json.Data = "";
                         json.Message = "上传的文件不能超过5MB，请重新选择上传！";
                         //context.Response.Write(JsonMapper.ToJson(json));
                         return;
                     }

                     string filePath = this.getLocalPath("");
                     string uploadPath = context.Server.MapPath("~" + filePath) ;//导入文件路径
                     string fileName = "";

                     fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff")+ ext;//文件名
                     if (!Directory.Exists(uploadPath))
                     {
                         Directory.CreateDirectory(uploadPath);
                     }
                       fullFileName = uploadPath +"\\"+ fileName;
                     file.SaveAs(fullFileName);//文件在服务器的全路径

                     ftp.Upload(fullFileName); // 上传到FTP服务器
                     string  file_path =  ftp.ftpRemotePath.Substring(ftp.ftpRemotePath.IndexOf('/')) ;//保存在服务器的路径
                     string org_file_path = (file_path + "\\" + fileName).Replace("\\", "/");
                     org_file_name = org_file_name.Substring(org_file_name.LastIndexOf("\\") + );
                     string strMsg = "{\"file_path\":\""+org_file_path+"\",\"file_name\":\""+org_file_name+"\"}";
                     //string strMsg = string.Format("[{\"file_path\":\"{0}\"},{\"file_name\":\"{1}\"}]", , );
                     json.Data = strMsg;

                 }
             }
             catch (Exception ex)
             {
                 json.Success = false;
                 json.Message = ex.Message;
                 json.Data = ex.Message + "###上传FTP路径：" + ftp.ftpURI;
             }
             finally
             {
                 string result = JsonMapper.ToJson(json);
                 //删除AP上的临时文件
                 if (File.Exists(fullFileName))
                 {
                     File.Delete(fullFileName);
                 }
                 context.Response.Write(result);
                 context.Response.End();
             }
         }

         private string getLocalPath(string flag)
         {
             string path = string.Empty;

             string ftpPath = ConfigurationManager.AppSettings["FTP"];
             string filePath = ConfigurationManager.AppSettings["uploadPath"];
             string ImportPath = ConfigurationManager.AppSettings["ImportPath"];
             string ExportPath = ConfigurationManager.AppSettings["ExportPath"];
             if ("".Equals(flag))
             {
                 path = ftpPath + filePath;
             }
             else if ("".Equals(flag))
             {
                 path = ftpPath + ImportPath;
             }
             else if ("".Equals(flag))
             {
                 path = ftpPath + ExportPath;
             }
             return path;
         }
         /// <summary>
         /// 返回FTP对像
         /// </summary>
         /// <returns></returns>
         private FTPHelper getFtpPath()
         {

             string ftpPath = ConfigurationManager.AppSettings["FTPServer"];
             string filePath = ConfigurationManager.AppSettings["FTPPath"];
             string ftpUser = ConfigurationManager.AppSettings["FTPUser"];
             string ftpPass = ConfigurationManager.AppSettings["FTPPass"];

             return new FTPHelper(ftpPath,filePath,ftpUser,ftpPass);
         }

         /// <summary>
         /// 获取文件扩展名
         /// </summary>
         /// <param name="fileName"></param>
         /// <returns></returns>
         private string getFileExtName(string fileName)
         {
             if (string.IsNullOrEmpty(fileName)) return string.Empty;
             if (!fileName.Contains(".")) return fileName;
             int posIndex = fileName.LastIndexOf('.');
             return fileName.Substring(posIndex);
         }
         /// <summary>
         /// 获取文件原始名
         /// </summary>
         /// <param name="fileName"></param>
         /// <returns></returns>
         private string getOrgFileName(string fileName)
         {
             if (string.IsNullOrEmpty(fileName)) return string.Empty;
             if (!fileName.Contains("/"))
                 return fileName;
             int posIndex = fileName.LastIndexOf('/')+;
             return fileName.Substring(posIndex);
         }
         public bool IsReusable
         {
             get
             {
                 return false;
             }
         }

     }
 }