Send Escape Key as Extended Ascii

[nbaker76]

Does anyone out there know how I can simulate sending an Escape key press and append it to a string that I am writing to an open port.

private Rs232 myPort = new Rs232();

try
{
// open the port
myPort.Open(1, 9600, 8, Rs232.DataParity.Parity_None, Rs232.DataStopBit.StopBit_1, 4096);
myPort.Write(Encoding.ASCII.GetBytes("?TEST1ON"));
myPort.Write(Encoding.ASCII.GetBytes("?TEST1OFF"));
myPort.Close();

}

The arrow pointing left is what I get when I press Alt 27 the decimal equivalent of the Escape key. It doesn't seem to be working...I need to send Escape then the string TEST1ON. Does anyone know what I can use to send an Escape keystroke as ascii?

Thank you

 

[earthandfire]

In VB.Net you could use:

Dim EscapeChar as string
Dim Test1On as String
Dim Test1Off as String

EscapeChar = Chr(27)
Test1On = EscapeChar + "TEST1ON"
Test1Off = EscapeChar + "TEST1OFF"

I think the equivalent for EacapeChar in C# would be something like:

EscapeChar = (char) 27

Since C# is not my language of choice, I'll leave you to work out the rest.

Hope this helps.

 

[nbaker76]

Hi,

Thanks for the tip, but I have actually tried to implement this since my last post...in C# it is this.

char esc = (char)27;

but when i try to do a myPort.Write(esc) it seems as if the command isn't getting sent.

thanks