我已使用以下说明通过 .net 为 EPSON TM-T88IV 热敏打印机打印。
我正在使用下面的代码，我已将编码更改为 UTF-8，但仍然无法打印 Unicode。
打印了一些垃圾字符。
private void frmMain_Load(object sender, EventArgs e)
{
Print(PrinterName, GetDocument());
}
private const string PrinterName = "EPSON TM-T88IV ReceiptE4";
private static byte[] GetDocument()
{
UTF8Encoding utf8 = new UTF8Encoding();
using (var ms = new MemoryStream())
using (var bw = new BinaryWriter(ms,Encoding.UTF8))
{
// Reset the printer bws (NV images are not cleared)
bw.Write(AsciiControlChars.Escape);
bw.Write("سلام دنیا");
bw.Write(AsciiControlChars.Newline);
// Feed 3 vertical motion units and cut the paper with a 1 point cut
bw.Write(AsciiControlChars.GroupSeparator);
bw.Write('V');
bw.Write((byte)66);
bw.Write((byte)3);
bw.Flush();
return ms.ToArray();
}
}
private static void Print(string printerName, byte[] document)
{
NativeMethods.DOC_INFO_1 documentInfo;
IntPtr printerHandle;
documentInfo = new NativeMethods.DOC_INFO_1();
documentInfo.pDataType = "RAW";
documentInfo.pDocName = "Bit Image Test";
printerHandle = new IntPtr(0);
if (NativeMethods.OpenPrinter(printerName.Normalize(), out printerHandle, IntPtr.Zero))
{
if (NativeMethods.StartDocPrinter(printerHandle, 1, documentInfo))
{
int bytesWritten;
byte[] managedData;
IntPtr unmanagedData;
managedData = document;
unmanagedData = Marshal.AllocCoTaskMem(managedData.Length);
Marshal.Copy(managedData, 0, unmanagedData, managedData.Length);
if (NativeMethods.StartPagePrinter(printerHandle))
{
NativeMethods.WritePrinter(
printerHandle,
unmanagedData,
managedData.Length,
out bytesWritten);
NativeMethods.EndPagePrinter(printerHandle);
}
else
{
throw new Win32Exception();
}
Marshal.FreeCoTaskMem(unmanagedData);
NativeMethods.EndDocPrinter(printerHandle);
}
else
{
throw new Win32Exception();
}
NativeMethods.ClosePrinter(printerHandle);
}
else
{
throw new Win32Exception();
}
}