asp.net 批量下载
如何在选择多个文件批量下载 打包文件中有多个文件呢？ 现在我的rar文件中就一个文件夹
[解决办法]
就是先压缩后下载，多个文件压缩成一个文件
[解决办法]
先压缩，在下载！
在程序中先引用ICSharpCode.SharpZipLib.dll 压缩文件的DLL

#region 压缩文件夹
try
{
string[] filenames = Directory.GetFiles(derctoryinfo.FullName);

if (filenames.Length <= 0)
{
JScript.Alert("在指定路径下未找到符合的影像文件！");
return;
}
using (ZipOutputStream zipoutput = new ZipOutputStream(File.Create(derctoryinfo.FullName + ".Zip")))
{
//zipoutput.SetLevel(10);
byte[] buffer = new byte[4096];

foreach (string file in filenames)
{
ZipEntry entry = new ZipEntry(Path.GetFileName(file));
entry.DateTime = DateTime.Now;

zipoutput.PutNextEntry(entry);
using (FileStream fs = File.OpenRead(file))
{
int sourcebytes;
do
{
sourcebytes = fs.Read(buffer, 0, buffer.Length);
zipoutput.Write(buffer, 0, sourcebytes);
} while (sourcebytes > 0);
}
}

zipoutput.Finish();
zipoutput.Close();
}


}
catch (Exception ex)

{

throw ex;
}
//实现下载功能
System.IO.FileInfo downfile = new System.IO.FileInfo(derctoryinfo.FullName + ".zip");
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(derctoryinfo.Name + ".zip"));
Response.AddHeader("Content-Length", downfile.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(downfile.FullName);
Response.Flush();
Response.Clear();
Response.End();
}
#endregion

这是一个压缩文件，并实现下载的主要代码，希望对你有帮助
[解决办法]
http://www.189works.com/article-85033-1.html
[解决办法]
http://www.189works.com/article-85033-1.html