private IntPtr AllocAttachs(out int fileCount)
{
fileCount = 0;
if (attachs == null)
return IntPtr.Zero;
if ((attachs.Count <= 0) || (attachs.Count > 100))
return IntPtr.Zero;
Type atype = typeof(MapiFileDesc);
int asize = Marshal.SizeOf(atype);
IntPtr ptra = Marshal.AllocHGlobal(attachs.Count * asize);
var mfd = new MapiFileDesc { position = (-1) };
var runptr = (int)ptra;
for (int i = 0; i < attachs.Count; i++)
{
var path = attachs[i] as string;
mfd.name = Path.GetFileName(path);
mfd.path = path;
Marshal.StructureToPtr(mfd, (IntPtr)runptr, false);
runptr += asize;
}
fileCount = attachs.Count;
return ptra;
}
private void GetAttachNames(out MailAttach[] aat)
{
aat = new MailAttach[lastMsg.fileCount];
Type fdtype = typeof(MapiFileDesc);
int fdsize = Marshal.SizeOf(fdtype);
var fdtmp = new MapiFileDesc();
var runptr = (int)lastMsg.files;
for (int i = 0; i < lastMsg.fileCount; i++)
{
Marshal.PtrToStructure((IntPtr)runptr, fdtmp);
runptr += fdsize;
aat[i] = new MailAttach();
if (fdtmp.flags == 0)
{
aat[i].position = fdtmp.position;
aat[i].name = fdtmp.name;
aat[i].path = fdtmp.path;
}
}
}
private bool SaveAttachByName(string name, string savepath)
{
bool f = true;
Type fdtype = typeof(MapiFileDesc);
int fdsize = Marshal.SizeOf(fdtype);
var fdtmp = new MapiFileDesc();
var runptr = (int)lastMsg.files;
for (int i = 0; i < lastMsg.fileCount; i++)
{
Marshal.PtrToStructure((IntPtr)runptr, fdtmp);
runptr += fdsize;
if (fdtmp.flags != 0)
continue;
if (fdtmp.name == null)
continue;
try
{
if (name == fdtmp.name)
{
if (File.Exists(savepath))
File.Delete(savepath);
File.Move(fdtmp.path, savepath);
}
}
catch (Exception)
{
f = false;
error = 13;
}
try
{
File.Delete(fdtmp.path);
}
catch (Exception)
{ }
}
return f;
}