asp.net批量下载文件
一、实现步骤
在用户操作界面，由用户选择需要下载的文件，系统根据所选文件，在服务器上创建用于存储所选文件的临时文件夹，将所选文件拷贝至临时文件夹。然后调用 RAR程序，对临时文件夹进行压缩，然后输出到客户端。最后删除临时文件夹。
二、代码实现
1、ASP.NET批量下载 核心代码C# 代码 复制
//遍历服务器指定文件夹下的所有文件 string path = "uploads/Image/"; string serverPath = Server.MapPath(path); //创建临时文件夹 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("图片拷贝成功!"); //产生RAR文件，及文件输出 RARSave(tempFolder, tempName); DownloadRAR(tempFolder + "////" + tempName + ".rar");
2、RARSave(string tempFolder, string tempName) 方法
C# 代码 复制/// <summary> /// 生成RAR文件 /// </summary> /// <param name="path">存放复制文件的目录</param> /// <param name="rarPatch">RAR文件存放目录</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) { throw; } }
3、DownloadRAR(string file)方法
C# 代码 复制
