图片上传/下载，ＤＯＣ．xls文档下载的方法

上传：

 

        protected string UpPicFile(System.Web.UI.WebControls.FileUpload FileUpControl, ref string fileType)
        {
            if (FileUpControl.HasFile)
            {
                string strErr = "";

                #region 验证
                if (FileUpControl.PostedFile == null)
                {
                    strErr += "对不起，上传文件不能为空！\\n";
                }
                int size = FileUpControl.PostedFile.ContentLength;//大小
                if (size < 1)
                {
                    strErr += "对不起，上传文件不能为空！\\n";
                }
                if (size > 10485760)
                {
                    strErr += "对不起，文件大小不能大于10M！\\n";
                }
                if (strErr != "")
                {
                    QDHotel.Common.MessageBox.Show(this, strErr);
                    return null;
                }
                #endregion

                string UploadFileType = FileUpControl.PostedFile.ContentType;
                string UpFileName = FileUpControl.FileName;
                string picname = DateTime.Now.ToString("yyyyMMddHHmmss") + UpFileName;
                fileType = UploadFileType;
                #region 不同类型UploadFileType

                switch (UploadFileType)
                {
                    case "image/gif":
                    case "image/bmp":
                    case "image/pjpeg":
                        {
                            Stream StreamObject = FileUpControl.PostedFile.InputStream;//建立数据流对像
                            System.Drawing.Image myImage = System.Drawing.Image.FromStream(StreamObject);
                            int w = myImage.Width;
                            int h = myImage.Height;
                        }
                        break;

                    case "application/msword":
                    case "application/vnd.ms-excel":
                        break;


                    default:
                        strErr += "对不起，不允许该文件格式上传！\\n";
                        break;
                }
                #endregion

                if (strErr != "")
                {
                    QDHotel.Common.MessageBox.Show(this, strErr);
                    return null;
                }

                try
                {
                    string path = ADUploadFolder + picname;
                    path = Server.MapPath(path);
                    FileUpControl.PostedFile.SaveAs(path);
                    return picname;
                }
                catch //(Exception ex)
                {
                    return null;
                }

            }
            else
            {
                return null;
            }
        }
        #endregion

 

 

下载

   private void ViewImage(string fileType, string fileName, bool forceDownload)
        }