public static IState Instance(PrinterException pe)
{
Error err = null;
if (pe.InnerException == null)
{
err = new Error(pe);
}
else
{
err = new Error(pe.InnerException);
}
printerError = err;
err.ReturnConfirm = Instance;
cr.State = States.AlertCashier.Instance(err);
return(state);
}
public void Print(byte[] content)
{
Exception exception = null;
WinSpoolWrapper.DOCINFOA di = new WinSpoolWrapper.DOCINFOA
{
pDocName = "Cloudspool",
pDataType = "RAW"
};
if (WinSpoolWrapper.OpenPrinter(PrinterName.Normalize(), out var printerHandle, IntPtr.Zero))
{
if (WinSpoolWrapper.StartDocPrinter(printerHandle, 1, di))
{
if (WinSpoolWrapper.StartPagePrinter(printerHandle))
{
IntPtr pUnmanagedBytes = Marshal.AllocCoTaskMem(content.Length);
Marshal.Copy(content, 0, pUnmanagedBytes, content.Length);
if (!WinSpoolWrapper.WritePrinter(printerHandle, pUnmanagedBytes, content.Length, out var written))
{
exception = new PrinterException("Unable to write to printer.");
}
Marshal.FreeCoTaskMem(pUnmanagedBytes);
WinSpoolWrapper.EndPagePrinter(printerHandle);
}
else
{
exception = new PrinterException("Cannot start page.");
}
WinSpoolWrapper.EndDocPrinter(printerHandle);
}
else
{
exception = new PrinterException("Cannot start document.");
}
WinSpoolWrapper.ClosePrinter(printerHandle);
}
