public void SendMessage(string msg)
{
if (_handle == null)
{
CreateHandle();
}
int bytesWritten;
byte[] bMessage = Encoding.Unicode.GetBytes(msg);
bool succeeded = Mailslot.WriteFile(_handle, bMessage,
bMessage.Length, out bytesWritten, IntPtr.Zero);
if (!succeeded || bMessage.Length != bytesWritten)
{
if (_handle != null)
{
_handle.Close();
}
_handle = null;
throw new Win32Exception();
}
}
public MailslotServer(string name)
{
_handle = Mailslot.CreateMailslot(@"\\.\mailslot\" + name, 0, unchecked ((int)0xFFFFFFFF), IntPtr.Zero);
if (_handle.IsInvalid)
{
throw new Win32Exception();
}
}
private void CreateHandle()
{
_handle = Mailslot.CreateFile(
@"\\" + _machine + @"\mailslot\" + _name,
Mailslot.FileDesiredAccess.GenericWrite,
Mailslot.FileShareMode.FileShareRead,
IntPtr.Zero,
Mailslot.FileCreationDisposition.OpenExisting,
0,
IntPtr.Zero);
if (_handle.IsInvalid)
{
throw new Win32Exception();
}
}
public string GetNextMessage()
{
const int maxMessageBytes = 4096;
int bytesRead;
// For non-blocking read, get message info first, and return null
// if no message is available. For our purposes, we want to block
// until a message is available.
//
//if (!Mailslot.GetMailslotInfo(_handle, IntPtr.Zero, out messageBytes,
// out messages, IntPtr.Zero)) throw new Win32Exception();
//
//if (messageBytes == Mailslot.MailslotNoMessage) return null;
var bBuffer = new byte[maxMessageBytes];
if (!Mailslot.ReadFile(_handle, bBuffer, maxMessageBytes, out bytesRead, IntPtr.Zero) || bytesRead == 0)
{
throw new Win32Exception();
}
return(Encoding.Unicode.GetString(bBuffer, 0, bytesRead));
}
