关于ASP.NET中上传大文件的问题

[shiyi889]

在网络上我找到很多种方式 。例如使用activex，httpworkrequest等，但是我不怎么看得懂，使用组件，我不知如何处理，但是用httpworkrequest对文件进行分块处理，我更是云里雾里。有那位能够给我详细讲解一下任意一个可以上传较大的文件的方式（超过100M），不要那种设置web.config的标签来上传的。谢谢

[子夜__]

可考虑断点续传。IIS也要配置。

[冰镇宝贝321]

/// <summary>
        /// 在上传文件时同时将数据存入数据库所做的事务操作，返回是否操作成功
        /// </summary>
        /// <param name="cmdText">insert命令</param>
        /// <param name="myParams">sql参数数组</param>
        /// <param name="file">文件上传组件</param>
        /// <param name="fileName">保存的文件名</param>
        protected bool RunTranscation(string cmdText, OleDbParameter[] myParams, FileUpload file,string fileName)
        {
            string connectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["McmConnection"].ToString();//连接数据库字符串
            OleDbConnection conn = new OleDbConnection(connectionString);//新建连接
            conn.Open();//打开连接
            OleDbTransaction otran = conn.BeginTransaction();//开启事务
            OleDbCommand cmd = new OleDbCommand(cmdText, conn);//创建命令
            cmd.Transaction = otran;//设置命令的事物为otran

            int result = 0;//判断插入数据库是否成功

            //为cmd添加参数
            foreach (OleDbParameter param in myParams)
            {
                cmd.Parameters.Add(param);
            }

            try
            {
                result=cmd.ExecuteNonQuery();//执行插入操作
                if (result == 1)//如果插入成功
                {
                    //string fileName = file.FileName;//文件名
                    //string sNewFileName = DateTime.Now.ToString("yyyyMMddhhmmsfff");//以时间来重命名图片
                    //string sExtension = file.FileName.Substring(file.FileName.LastIndexOf('.'));//图片的后缀名
                    //file.SaveAs(uploadPath + sNewFileName + sExtension);//保存图片文件
                    //string filePath = "../Uploads/" + folderName + "/" + sNewFileName + sExtension;//上传到Uploads文件夹的不同的文件夹下


                    file_pastPaper.SaveAs(Server.MapPath("../"+fileName));//上传到文件夹中
                    otran.Commit();//提交事务
                    return true;
                }
                otran.Rollback();//回滚事务，操作失败
            }
            catch (Exception se)
            {
                //Response.Write("<script>alert('"+se.Message+"')</script>");\
                //Response.Write("<script>alert('"+se.Message.ToString()+"')</script>");
                otran.Rollback();//回滚事务
                return false;
            }
            finally
            {
                conn.Close();
            }

            return false;
        }

 

 

 

[冰镇宝贝321]

HttpPostedFile oFile = Request.Files["NewFile"];

            // Check if the file has been correctly uploaded
            if (oFile == null || oFile.ContentLength == 0 || !(Convert.ToInt32(HttpContext.GetGlobalResourceObject("SystemInfo", "OpenFileup")) == 1))
            {
                SendResults(202);
                return;
            }

            int iErrorNumber = 0;
            string sFileUrl = "";

            // Get the uploaded file name.
            string sFileName = System.IO.Path.GetFileName(oFile.FileName).Substring(System.IO.Path.GetFileName(oFile.FileName).LastIndexOf(".") + 1).ToLower();
            string TypeName = HttpContext.GetGlobalResourceObject("SystemInfo", "UpfileTypeSettings").ToString();

            if (!TypeName.Contains(sFileName) ||
                oFile.ContentLength >= Convert.ToInt32(HttpContext.GetGlobalResourceObject("SystemInfo", "MaxFileLengthSettingsKB")) * 1024) 
                //文件类型判断  文件大小验证
            {
                SendResults(202);
                return;
            }

            

            int iCounter = 0;

            while (true)
            {
                //判断文件是否可以上传
                if (CheckUploadFileExtension(sFileName))
                {
                    string sFilePath = System.IO.Path.Combine(this.UserFilesDirectory, sFileName);

                    if (System.IO.File.Exists(sFilePath))
                    {
                        iCounter++;
                        sFileName =
                            System.IO.Path.GetFileNameWithoutExtension(oFile.FileName) +
                            "(" + iCounter + ")" +
                            System.IO.Path.GetExtension(oFile.FileName);

                        iErrorNumber = 201;
                    }
                    else
                    {
                        if (TypeName.Contains(".gif") || TypeName.Contains(".jpg") || TypeName.Contains("bmp") || TypeName.Contains("png"))
                        {
                            System.Drawing.Image image = System.Drawing.Image.FromStream(oFile.InputStream);

                            int width = image.Width;
                            int height = image.Height;

                            int max = Convert.ToInt32(HttpContext.GetGlobalResourceObject("SystemInfo", "ImageMaxWidth"));
                            if (width > max)
                            {
                                try
                                {
                                    System.Drawing.Image newPic; //定义新位图对象
                                    //String picPath = path + userID + time + fileExtension;
                                    if (width > height)
                                    {
                                        newPic = new Bitmap(image, max, height * max / width); //缩放
                                    }
                                    else
                                    {
                                        newPic = new Bitmap(image, width * max / height, max); //缩放
                                    }
                                    newPic.Save(sFilePath, System.Drawing.Imaging.ImageFormat.Bmp); //将处理后的图片保存成bmp文件
                                    sFileUrl = this.UserFilesPath + sFileName;
                                    break;
                                }
                                catch
                                {
                                }
                            }
                        }

                        oFile.SaveAs(sFilePath);
                        sFileUrl = this.UserFilesPath + sFileName;
                        break;
                    }
                }
                else
                {
                    //不允许上传
                    SendResults(202);
                    break;
                }
            }

            SendResults(iErrorNumber, sFileUrl, sFileName);

[ziyouli]

400M以内的FileUpLoad控件可以直接搞定