Send raw data to print not working

Question

I want to send raw data to print, avoiding printer selection (fast print).

I am trying to use this helper provided by Microsoft: https://support.microsoft.com/en-us/

Answer 1

In cases where you are using the MSDN example from here https://support.microsoft.com/en-us/kb/322091#top but are trying to use an array of bytes instead of a string or file... This may help

public static void SendBytesToLocalPrinter(byte[] data, string printerName)
{
   var size = Marshal.SizeOf(data[0]) * data.Length;
   var pBytes = Marshal.AllocHGlobal(size);
   try
   {
      SendBytesToPrinter(printerName, pBytes, size);
   }
   finally
   {
      Marshal.FreeCoTaskMem(pBytes);
   }
}

This does not change with the byte array encoding. This is useful if you are trying to send some utf8 encoded byte sequences with some binary (ie. image) data mixed in as was the case for our team.