/// <summary>
/// Deallocates the files in a message.
/// </summary>
/// <param name="message">The message to deallocate the files from.</param>
private static void DeallocFiles(NativeMethods.MapiMessage message)
{
if (message.Files == IntPtr.Zero)
{
return;
}
Type fileDescType = typeof(NativeMethods.MapiFileDescriptor);
int fsize = Marshal.SizeOf(fileDescType);
// Get the ptr to the files
int runptr = (int)message.Files;
// Release each file
for (int i = 0; i < message.FileCount; i++)
{
Marshal.DestroyStructure((IntPtr)runptr, fileDescType);
runptr += fsize;
}
// Release the file
Marshal.FreeHGlobal(message.Files);
}
/// <summary>
/// Sends the mail message.
/// </summary>
private void ShowMail()
{
NativeMethods.MapiMessage message = new NativeMethods.MapiMessage();
using (RecipientCollection.InteropRecipientCollection interopRecipients
= _recipientCollection.GetInteropRepresentation())
{
message.Subject = _subject;
message.NoteText = _body;
message.Recipients = interopRecipients.Handle;
message.RecipientCount = _recipientCollection.Count;
// Check if we need to add attachments
if (_files.Count > 0)
{
// Add attachments
message.Files = AllocAttachments(out message.FileCount);
}
// Signal the creating thread (make the remaining code async)
_manualResetEvent.Set();
int error = (int)NativeMethods.MAPISendMail(IntPtr.Zero, IntPtr.Zero, message, MAPI_DIALOG, 0);
if (_files.Count > 0)
{
// Deallocate the files
DeallocFiles(message);
}
// Check for error
if (error != SUCCESS_SUCCESS)
{
throw new Exception(LogErrorMapi(error));
}
}
}