private long ExtractFromZip(string fName, string entryName, string destPath)
{
ZipFile zf = null;
System.IO.Stream zp = null;
FileStream fs = null;
ZipEntry ze = null;
long ret = -1;
try
{
zf = new ZipFile(fName);
ze = zf.GetEntry(entryName);
zp = zf.GetInputStream(ze);
string pt = destPath;
pt += "\\" + entryName;
if (CIO.FileExists(pt))
{
CIO.blRemoveFile(pt);
}
fs = new FileStream(pt, FileMode.CreateNew);
int bt;
while (true)
{
bt = zp.ReadByte();
if (bt < 0)
{
break;
}
fs.WriteByte(CConvert.ToByte(bt));
}
ret = ze.Size;
}
catch (Exception ex)
{
CLog.stLogException(new Exception("ExtractFromZip:", ex));
ret = -1;
}
finally
{
if (zf != null)
{
zf.Close();
}
if (zp != null)
{
zp.Close();
}
if (fs != null)
{
fs.Close();
}
CIO.blRemoveFile(fName);
}
return(ret);
}