asp.net文件压缩，下载，物理路径，相对路径，删除文件

知识动手实践一次，就可以变成自己的了。不然一直是老师的，书本的。

这几天做了一个小小的项目，需要用到文件下载功能，期初想到只是单个的文件，后面想到如果很多文件怎么办？于是又想到文件压缩。几经波折实践，总是达到了我想要的效果了。现今把作为一个笔记记录下来，以便下次之用。

 #region 物理路径和相对路径的转换
        //本地路径转换成URL相对路径
        public static string urlconvertor(string imagesurl1)
        {
            string tmpRootDir = HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
            string imagesurl2 = imagesurl1.Replace(tmpRootDir, ""); //转换成相对路径
            imagesurl2 = imagesurl2.Replace(@"\", @"/");
            //imagesurl2 = imagesurl2.Replace(@"Aspx_Uc/", @"");
            return imagesurl2;
        }
        //相对路径转换成服务器本地物理路径
        public static string urlconvertorlocal(string imagesurl1)
        {
            string tmpRootDir = HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
            string imagesurl2 = tmpRootDir + imagesurl1.Replace(@"/", @"\"); //转换成绝对路径
            return imagesurl2;
        }
        #endregion

        /// <summary>
        /// 获取物理地址
        /// </summary>
        public static string MapPathFile(string FileName)
        {
            return HttpContext.Current.Server.MapPath(FileName);
        }
        /// <summary>
        /// 普通下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        public static bool DownLoadold(string FileName)
        {
            bool bools = false;
            string destFileName = FileName;// urlconvertor(FileName);// MapPathFile(FileName);
            if (File.Exists(destFileName))
            {
                FileInfo fi = new FileInfo(destFileName);
                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ClearHeaders();
                HttpContext.Current.Response.Buffer = false;
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));
                HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.WriteFile(destFileName);
                HttpContext.Current.Response.Flush();
                AiLvYou.Common.DownUnit.FilePicDelete(destFileName);//删除当前下载的文件
                HttpContext.Current.Response.End();

                bools = true;
            }
            return bools;
        }

 //检查文件是否已经存在存在才下载
        public static bool FileExists(string path)
        {
            bool ret = false;
            System.IO.FileInfo file = new System.IO.FileInfo(path);
            if (file.Exists)
            {
                ret = true;
            }
            return ret;
        }
        /// <summary>
        /// 删除单个文件
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static bool FilePicDelete(string path)
        {
            bool ret = false;
            System.IO.FileInfo file = new System.IO.FileInfo(path);
            if (file.Exists)
            {
                file.Delete();
                ret = true;
            }
            //else //删除目录
            //{
            // Directory.Delete(file );
            //}
            return ret;
        }

        /// <summary>
        /// 用递归方法删除文件夹目录及文件
        /// </summary>
        /// <param name="dir">带文件夹名的路径</param>
        public  static void DeleteFolder(string dir)
        {
            if (Directory.Exists(dir)) //如果存在这个文件夹删除之
            {
                foreach (string d in Directory.GetFileSystemEntries(dir))
                {
                    if (File.Exists(d))
                        File.Delete(d); //直接删除其中的文件
                    else
                        DeleteFolder(d); //递归删除子文件夹
                }
                Directory.Delete(dir, true); //删除已空文件夹
            }
        }  

第一种压缩方法 用WinRAR 需要安装此软件 ，而且压缩了整个目录，目前还没有解决

  //会有整个目录
        public void RARsave(string patch, string rarPatch, string rarName)
        {
            String the_rar;
            RegistryKey the_Reg;
            Object the_Obj;
            String the_Info;
            ProcessStartInfo the_StartInfo;
            Process the_Process;
            try
            {
                the_Reg = Registry.ClassesRoot.OpenSubKey(@"WinRAR");

                the_Obj = the_Reg.GetValue("");
                the_rar = the_Obj.ToString();
                the_Reg.Close();
                the_rar = the_rar.Substring(, the_rar.Length - );

               Directory.CreateDirectory(patch);//20151222

                //命令参数
                //the_Info = " a    " + rarName + "  " + @"C:Test?70821.txt"; //文件压缩
                the_Info = " a " + rarName + "  " + patch +"  -r";
                the_StartInfo = new ProcessStartInfo();
                the_StartInfo.FileName = "WinRar";//the_rar;
                the_StartInfo.Arguments = the_Info;
                the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                //打包文件存放目录
                the_StartInfo.WorkingDirectory = rarPatch;
                the_Process = new Process();
                the_Process.StartInfo = the_StartInfo;
                the_Process.Start();
                the_Process.WaitForExit();
                the_Process.Close();

            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

/**//****************************************
        * 函数名称：CopyDir
        * 功能说明：将指定文件夹下面的所有内容copy到目标文件夹下面 果目标文件夹为只读属性就会报错。
        * 参    数：srcPath:原始路径,aimPath:目标文件夹
        * 调用示列：
        *          string srcPath = Server.MapPath("test/");
        *          string aimPath = Server.MapPath("test1/");
        *          EC.FileObj.CopyDir(srcPath,aimPath);
        *****************************************/
        /**//// <summary>
        /// 指定文件夹下面的所有内容copy到目标文件夹下面
        /// </summary>
        /// <param name="srcPath">原始路径</param>
        /// <param name="aimPath">目标文件夹</param>
        public static void CopyDir(string srcPath, string aimPath)
        {
            try
            {
                // 检查目标目录是否以目录分割字符结束如果不是则添加之
                if (aimPath[aimPath.Length - ] != Path.DirectorySeparatorChar)
                    aimPath += Path.DirectorySeparatorChar;
                // 判断目标目录是否存在如果不存在则新建之
                if (!Directory.Exists(aimPath))
                    Directory.CreateDirectory(aimPath);
                // 得到源目录的文件列表，该里面是包含文件以及目录路径的一个数组
                //如果你指向copy目标文件下面的文件而不包含目录请使用下面的方法
                //string[] fileList = Directory.GetFiles(srcPath);
                string[] fileList = Directory.GetFileSystemEntries(srcPath);
                //遍历所有的文件和目录
                foreach (string file in fileList)
                {
                    //先当作目录处理如果存在这个目录就递归Copy该目录下面的文件

                    if (Directory.Exists(file))
                        CopyDir(file, aimPath + Path.GetFileName(file));
                    //否则直接Copy文件
                    else
                        File.Copy(file, aimPath + Path.GetFileName(file), true);
                }
            }
            catch (Exception ee)
            {
                throw new Exception(ee.ToString());
            }
        }

使用代码：

  protected void btndown_Click(object sender, EventArgs e)
        {
            string Folder = DateTime.Now.ToString("HHMMss");
            string savefilepath = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload");
            string savefilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload/image");

            string tempFolder = Path.Combine(savefilepath, Folder);

            Directory.CreateDirectory(tempFolder);
            CopyDir(savefilepath2, tempFolder);

           // RARsave(@"D:\images", tempFolder, Folder);控制了解压目录但是没有文件
            RARsave(tempFolder, tempFolder, Folder);
        }

第二种压缩方法，使用了 ICSharpCode.SharpZipLib.dll 文件。先下载，放到bin目录下，然后引用。

实现代码

  /// <summary>
        /// 生成压缩文件
        /// </summary>
        /// <param name="strZipPath">生成的zip文件的路径</param>
        /// <param name="strZipTopDirectoryPath">源文件的上级目录</param>
        /// <param name="intZipLevel">T压缩等级</param>
        /// <param name="strPassword">压缩包解压密码</param>
        /// <param name="filesOrDirectoriesPaths">源文件路径</param>
        /// <returns></returns>
        private bool Zip(string strZipPath, string strZipTopDirectoryPath, int intZipLevel, string strPassword, string[] filesOrDirectoriesPaths)
        {
            try
            {
                List<string> AllFilesPath = new List<string>();
                if (filesOrDirectoriesPaths.Length > ) // get all files path
                {
                    for (int i = ; i < filesOrDirectoriesPaths.Length; i++)
                    {
                        if (File.Exists(filesOrDirectoriesPaths[i]))
                        {
                            AllFilesPath.Add(filesOrDirectoriesPaths[i]);
                        }
                        else if (Directory.Exists(filesOrDirectoriesPaths[i]))
                        {
                            GetDirectoryFiles(filesOrDirectoriesPaths[i], AllFilesPath);
                        }
                    }
                }

                if (AllFilesPath.Count > )
                {

                    ZipOutputStream zipOutputStream = new ZipOutputStream(File.Create(strZipPath));
                    zipOutputStream.SetLevel(intZipLevel);
                    zipOutputStream.Password = strPassword;

                    for (int i = ; i < AllFilesPath.Count; i++)
                    {
                        string strFile = AllFilesPath[i].ToString();
                        try
                        {
                            if (strFile.Substring(strFile.Length - ) == "") //folder
                            {
                                string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
                                if (strFileName.StartsWith(""))
                                {
                                    strFileName = strFileName.Substring();
                                }
                                ZipEntry entry = new ZipEntry(strFileName);
                                entry.DateTime = DateTime.Now;
                                zipOutputStream.PutNextEntry(entry);
                            }
                            else //file
                            {
                                FileStream fs = File.OpenRead(strFile);

                                byte[] buffer = new byte[fs.Length];
                                fs.Read(buffer, , buffer.Length);

                                string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
                                if (strFileName.StartsWith(""))
                                {
                                    strFileName = strFileName.Substring();
                                }
                                ZipEntry entry = new ZipEntry(strFileName);
                                entry.DateTime = DateTime.Now;
                                zipOutputStream.PutNextEntry(entry);
                                zipOutputStream.Write(buffer, , buffer.Length);

                                fs.Close();
                                fs.Dispose();
                            }
                        }
                        catch
                        {
                            continue;
                        }
                    }

                    zipOutputStream.Finish();
                    zipOutputStream.Close();

                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch
            {
                return false;
            }
        }
        /// <summary>
        /// Gets the directory files.
        /// </summary>
        /// <param name="strParentDirectoryPath">源文件路径</param>
        /// <param name="AllFilesPath">所有文件路径</param>
        private void GetDirectoryFiles(string strParentDirectoryPath, List<string> AllFilesPath)
        {
            string[] files = Directory.GetFiles(strParentDirectoryPath);
            for (int i = ; i < files.Length; i++)
            {
                AllFilesPath.Add(files[i]);
            }
            string[] directorys = Directory.GetDirectories(strParentDirectoryPath);
            for (int i = ; i < directorys.Length; i++)
            {
                GetDirectoryFiles(directorys[i], AllFilesPath);
            }
            if (files.Length ==  && directorys.Length == ) //empty folder
            {
                AllFilesPath.Add(strParentDirectoryPath);
            }
        }

调用代码：

 protected void btndowmload_Click(object sender, EventArgs e)
        {
            //http://www.cnblogs.com/LYunF/archive/2012/02/18/2357591.html

            string Folder = DateTime.Now.ToString("HHMMss");
            string savefilepath = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload");
            string savefilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload/image");

            // 判断目标目录是否存在如果不存在则新建之
            /*
            string newfilepath = Path.Combine(savefilepath, Folder);
            if (!Directory.Exists(newfilepath))
                Directory.CreateDirectory(newfilepath);//问题目录问题
            string newfilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload"+"/"+Folder);
            string strZipTopDirectoryPath = newfilepath2;
            string tempFolder = Path.Combine(newfilepath2, Folder);

            */
            string tempFolder = Path.Combine(savefilepath, Folder);
            string strZipTopDirectoryPath = savefilepath;
            string strZipPath = tempFolder + ".zip";
            int intZipLevel = ;
            string strPassword = "";
            string[] filesOrDirectoriesPaths = new string[] { savefilepath2 };
            bool flag = Zip(strZipPath, strZipTopDirectoryPath, intZipLevel, strPassword, filesOrDirectoriesPaths);
            if (flag)
            {
                ResponseFile(strZipPath);
            }
        }

下载代码：

 protected void ResponseFile(string fileName)
        {

            FileInfo fileInfo = new FileInfo(fileName);
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            //  Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName); //upload 这里可以改变下载名称
            Response.AddHeader("Content-Disposition", "attachment;filename=upload.zip"); //
            Response.AddHeader("Content-Length", fileInfo.Length.ToString());
            Response.AddHeader("Content-Transfer-Encoding", "binary");
            Response.ContentType = "application/octet-stream";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            Response.WriteFile(fileInfo.FullName);
            Response.Flush();
            // string tempPath = fileName.Substring(0, fileName.LastIndexOf("\\"));
            AiLvYou.Common.DownUnit.FilePicDelete(fileName);
            // Directory.Delete(tempPath);
            Response.End();

        }