asp.net批量下載文件
一、實(shí)現(xiàn)步驟
在用戶操作界面，由用戶選擇需要下載的文件，系統(tǒng)根據(jù)所選文件，在服務(wù)器上創(chuàng)建用于存儲(chǔ)所選文件的臨時(shí)文件夾，將所選文件拷貝至臨時(shí)文件夾。然后調(diào)用 RAR程序，對(duì)臨時(shí)文件夾進(jìn)行壓縮，然后輸出到客戶端。最后刪除臨時(shí)文件夾。
二、代碼實(shí)現(xiàn)
1、ASP.NET批量下載 核心代碼C# 代碼 復(fù)制
//遍歷服務(wù)器指定文件夾下的所有文件 string path = "uploads/Image/"; string serverPath = Server.MapPath(path); //創(chuàng)建臨時(shí)文件夾 string tempName = DateTime.Now.ToString("yyyyMMddHHMMss"); string tempFolder = Path.Combine(serverPath, tempName); Directory.CreateDirectory(tempFolder); DirectoryInfo folder = new DirectoryInfo(serverPath); foreach (FileInfo file in folder.GetFiles())
{
string filename = file.Name; File.Copy(serverPath + "/" + filename, tempFolder + "/" + filename);
} //ZKHelper.JSHelper.Alert("圖片拷貝成功!"); //產(chǎn)生RAR文件，及文件輸出 RARSave(tempFolder, tempName); DownloadRAR(tempFolder + "http:////" + tempName + ".rar");
2、RARSave(string tempFolder, string tempName) 方法
C# 代碼 復(fù)制/// <summary> /// 生成RAR文件 /// </summary> /// <param name="path">存放復(fù)制文件的目錄</param> /// <param name="rarPatch">RAR文件存放目錄</param> /// <param name="rarName">RAR文件名</param> PRivate void RARSave(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(1, the_rar.Length - 7); the_Info = " a " + rarName + " -r"; the_StartInfo = new ProcessStartInfo(); the_StartInfo.FileName = "WinRar";//the_rar; the_StartInfo.Arguments = the_Info; the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden; //打包文件存放目錄 the_StartInfo.WorkingDirectory = rarPatch; the_Process = new Process(); the_Process.StartInfo = the_StartInfo; the_Process.Start(); the_Process.WaitForExit(); the_Process.Close();
} catch (Exception) { throw; } }
3、DownloadRAR(string file)方法
C# 代碼 復(fù)制
