Help with printing to receipt printer

[johnsun1976]

Hi.. I'm using a Star SP200 receipt printer and trying to format text on it..

I found this example on the printer's homepage in VB:

PRINT #1, CHR$(27); CHR$(112);
PRINT #1, "14-dot pitch font"

What I'm trying to do is this:

byte []ba = new byte[32];

h = CreateFile("LPT1", GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

ba[0] = 0x1B;
ba[1] = 0x0D;
ba[2] = 0x0A;
WriteFile(h, p, 3, &n, 0);

ba[0] = 0x70;
ba[1] = 0x0D;
ba[2] = 0x0A;
WriteFile(h, p, 3, &n, 0);

count = stob("14-dot pitch font", ba);
WriteFile(h, p, count, &n, 0);


private int stob(string str, byte []ba)
{
int i = 0;
for(i=0; (i<str.Length && i<ba.Length-2); i++)
{
ba = Convert.ToByte(str);
}

ba = 0x0D;
ba[i+1] = 0x0A;

return i+2;
}

stob is a function that take a string and return a byte array and the lengh for the parameters of WriteFile expects..

Nothing seems to happen when I print.. Does anyone know what I'm doing wrong?
Thanks
John

 

[chiph]

Where are you getting the CreateFile and WriteFile functions from? In .NET, you should be using a StreamWriter object.

StreamWriter sw = new StreamWriter("LPT1:");
sw.AutoFlush = true;
sw.Write("This is a test");
sw.Close();

Note: I haven't tried this opening the LPT1 device. Give it a try.

Chip H.