protected
void
Btn_down_Click(
object
sender, EventArgs e)
{
if
(ckl_ck.Items.Count > 0)
{
List<
string
> listFJ =
new
List<
string
>();
List<
string
> listFJName =
new
List<
string
>();
for
(
int
i = 0; i < ckl_ck.Items.Count; i++)
{
if
(ckl_ck.Items[i].Selected)
{
listFJ.Add(Server.MapPath(
"Resource/Help/"
) + ckl_ck.Items[i].Text);
listFJName.Add(ckl_ck.Items[i].Text);
}
}
string
time = DateTime.Now.Ticks.ToString();
ZipFileMain(listFJ.ToArray(), listFJName.ToArray(), Server.MapPath(
"Resource/Help/"
+ time +
".zip"
), 9);
DownloadFile(Server.UrlEncode(
"附件.zip"
), Server.MapPath(
"Resource/Help/"
+ time +
".zip"
));
}
}
private
void
DownloadFile(
string
fileName,
string
filePath)
{
FileInfo fileInfo =
new
FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader(
"Content-Disposition"
,
"attachment;filename="
+ fileName);
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();
File.Delete(filePath);
Response.End();
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileName">要压缩的所有文件(完全路径)</param>
/// <param name="fileName">文件名称</param>
/// <param name="name">压缩后文件路径</param>
/// <param name="Level">压缩级别</param>
public
void
ZipFileMain(
string
[] filenames,
string
[] fileName,
string
name,
int
Level)
{
ZipOutputStream s =
new
ZipOutputStream(File.Create(name));
Crc32 crc =
new
Crc32();
s.SetLevel(Level);
try
{
int
m = 0;
foreach
(
string
file
in
filenames)
{
FileStream fs = File.OpenRead(file);
byte
[] buffer =
new
byte
[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ZipEntry entry =
new
ZipEntry(fileName[m].ToString());
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
m++;
}
}
catch
{
throw
;
}
finally
{
s.Finish();
s.Close();
}
}