其实需求是这样，
要做一键导出，
有图片，有照片，youhtml，存在不同的文件夹，每次下载都必须下载最新数据，因为FTP是随时更新的。
1.这要是一直下载下载，浏览器一直跳窗口，蛋疼的我都看不下去。所以，只能选择别的办法
2.要是放在WEB下载，我觉得肯定会崩溃的呀，所以想选择客户端直接下载，但是必须得装插件，类型ActionX之类的。头给否认了。我凑，只能想别的办法
3.只能先用WEB把流读下来，压缩，然后传给用户，很蛋疼，这要是谁点了，多考验服务器内存CPU，但是头说了，这样也比插件好，好吧，开始做吧
学习连接
http://www.csharpwin.com/dotnetspace/7579r311.shtml
下面是代码
#region Zip multi files
public static int Zip(string destFolder, string[] srcFiles, string folderName, CompressLevel level)
{
OperFileFTP operFileFTP = new OperFileFTP();
ZipOutputStream zipStream = null;
int count = ;
string snappath = "ftp://ip";
try
{
//Use Crc32
Crc32 crc32 = new Crc32();
Stream ftpoutStream = null;
//Create Zip File
zipStream = new ZipOutputStream(File.Create(destFolder));
//Specify Level
zipStream.SetLevel(Convert.ToInt32(level));
#region Foreach File;
foreach (string file in srcFiles)
{
Uri u;
if (file != null)
{
string filepath = file;
string ftpfilepath = file;
if (Path.GetExtension(file) == ".jpg")
{
u = new Uri(snappath);
filepath = filepath.Replace("\\", "/");
ftpfilepath = ftpfilepath.Replace("\\", "/");
}
else
{
u = new Uri(ftppath);
}
filepath = filepath.Substring(, filepath.LastIndexOf("/"));
clsFTP cs = new clsFTP(u, entity.User_Name, entity.Pwd);
byte[] buffer = cs.DownloadFile(ftpfilepath);
//Specify ZipEntry
crc32.Reset();
crc32.Update(buffer);
ZipEntry zipEntry = new ZipEntry(Path.Combine(filepath, Path.GetFileName(file)));
zipEntry.DateTime = DateTime.Now;
zipEntry.Size = buffer.Length;
zipEntry.Crc = crc32.Value;
//Put file info into zip stream
zipStream.PutNextEntry(zipEntry);
zipStream.Write(buffer, , buffer.Length);
count++;
}
}
if (!string.IsNullOrEmpty(folderName))
{
byte[] buffer = System.Text.Encoding.Default.GetBytes(folderName);
//Specify ZipEntry
crc32.Reset();
crc32.Update(buffer);
ZipEntry zipEntry = new ZipEntry(Path.Combine("", Path.GetFileName("OperationReport.htm")));
zipEntry.DateTime = DateTime.Now;
zipEntry.Size = buffer.Length;
zipEntry.Crc = crc32.Value;
//Put file info into zip stream
zipStream.PutNextEntry(zipEntry);
//Put file data into zip stream
zipStream.Write(buffer, , buffer.Length);
count++;
}
#endregion;
if (ftpoutStream != null)
ftpoutStream.Flush();
}
catch
{
throw;
}
finally
{
//Clear Resource
if (zipStream != null)
{
zipStream.Finish();
zipStream.Close();
}
}
FileStream stream = new FileStream(destFolder, FileMode.Open);
//long cl = stream.ContentLength;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpContext.Current.Server.UrlEncode(Path.GetFileName(destFolder)));
int bufferSize = ;
int readCount;
byte[] bufferr = new byte[bufferSize];
char[] cChar = Encoding.ASCII.GetChars(bufferr);
//接收FTP文件流
while ((readCount = stream.Read(bufferr, , )) > )
{
HttpContext.Current.Response.OutputStream.Write(bufferr, , readCount);
HttpContext.Current.Response.Flush();
}
stream.Flush();
stream.Close();
if (File.Exists(destFolder))
File.Delete(destFolder);
return count;
}
#endregion
方法如上。。
一下为引用代码。。
时间有限，有机会补充
string[] files = new string[];
Zip(context.Server.MapPath("Tech_" + id + ".zip"), files, str, CompressLevel.Level8);