Hello -
I'm trying to wite these control characters to the serial port w/o
success.
I've tried sp.Write((Keys. ControlKey & Keys.X).ToStrin g());
sp.Write((Keys. Control & Keys.X).ToStrin g());
char[] temp = { Convert.ToChar( Keys.Control), Convert.ToChar( Keys.X)
};
sp.Write(temp, 0, 2);
and other screwy variations.
Any suggestions how to do this?
Thanks, Tom 3 9418
On Sat, 27 Sep 2008 11:00:54 -0700, Blip <bl**@krumpli.c omwrote:
Hello -
I'm trying to wite these control characters to the serial port w/o
success.
I've tried sp.Write((Keys. ControlKey & Keys.X).ToStrin g());
sp.Write((Keys. Control & Keys.X).ToStrin g());
What's "sp"? Is that an instance of the SerialPort class?
The bottom line here is that you are trying to mix the user-input data
structures associated with keyboard input with the ASCII used to represent
that input.
The first non-zero byte values for ASCII are reserved for control input.
By convention, the letters are assigned in sequence, with Control-A being
1, Control-B being 2, etc. Control-S would be 19. You can probably
figure out Control-X on your own. :)
Just send the correct byte value. You aren't going to get anywhere trying
to use values from the Keys enumeration, as that's tied to the keyboard,
not ASCII.
Pete
"Blip" <bl**@krumpli.c omwrote in message
news:3a******** *************** *********@4ax.c om...
I'm trying to wite these control characters to the serial port w/o
success.
I've tried sp.Write((Keys. ControlKey & Keys.X).ToStrin g());
sp.Write((Keys. Control & Keys.X).ToStrin g());
char[] temp = { Convert.ToChar( Keys.Control), Convert.ToChar( Keys.X)
};
sp.Write(temp, 0, 2);
and other screwy variations.
Any suggestions how to do this?
You can use the numeric value of the control character: Ctrl-A is ASCII
1, Ctrl-B is 2, Ctrl-C is 3, and so on.
SerialPort sp = ...;
....
char ctrlS = (char)('S'-'A'+1);
char[] charsToWrite = new char[]{ctrlS};
sp.Write(charsT oWrite, 0, 1);
To make the same point Pete did, a little more explicitly:
Serial ports don't transmit keys. They transmit bytes, which are normally
the ASCII representations of characters.
"Keys.ControlKe y & Keys.X" has to do with sensing what is going on on a PC
keyboard. But serial ports do not transmit the whole state of the keyboard.
For instance, the F keys and the arrows are entirely outside the ASCII
system.
An ASCII chart will tell you that, for instance, Ctrl-A is 1, Ctrl-B is 2,
'A' is 65, and so on. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Steve Horrillo |
last post by:
I can't figure out why this script won't insert the subject in the email and
why can't I control the font and size being used? I'm not sure where to post
this. Let me know where if this is OT.
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function isPPC() {
if (navigator.appVersion.indexOf("PPC") != -1) return true;
else return false;
|
by: zhimin |
last post by:
Hi,
I'm writing a program to send large file(100m) through dotnet using
TCPListener & TCPClient, I'm sending the file with a ask and response loop:
1. Client send a flag 1 to server indicate it has data send to server.
2. Client send the buffer block size.
3. Client send the actual buffer to the server.
4. Server send a flag 1 to client indicating that the buffer has been
successfully receeived.
5. The next loop until all data of the...
|
by: John J. Hughes II |
last post by:
I have a service that needs to send e-mail alerts. I have been attempting
to use the System.Net.Mail function from .NET but this seems to require the
IIS be installed and running. Since some of my customers are not really
happy with having the IIS installed, not being used except to send e-mail
this is becoming a problem.
I have also tried using a little program from code project for sending
e-mail which works great on older servers...
|
by: Manfred Braun |
last post by:
Hi All,
I am trying to understand the blocking method socket.Send().
The call blocks as expected, but does this mean, it returnes after the
underlying TCP layer got a confirmation, that the send data was received by
the socket on the remote end? Can I count on that? Do I understand TCP
correctly in that, it gives confirmation ? I do not
expect, that a .Net based receiver got that data when socket.Send()
terminates!
|
by: Gerard |
last post by:
Hello
I have created a windows service to monitor a database, it starts some
checks when a timer elapses. The checks send emails depending on their
findings. My issue is that when I created a windows application it
worked fine, however I need to use a service as I don't want to rely
on a user being logged in. The errors I get are:
Index #:System.Web.HttpException: Could not access 'CDO.Message'
object. --->...
| |
by: supz |
last post by:
Hi,
I use the standard code given below to send an email from an ASP.NET
web form. The code executes fine but no Email is sent. All emails get
queued in the Inetpub mail queue.
I'm using my local default SMTP Server and my from address is a valid
Yahoo/Hotmail address. I have configures the local SMTP Server to allow
the IP Address 127.0.0.1.
|
by: ultr |
last post by:
Hello,
I have read that send() may not send whole message and returns the
nuber of bytes sent, so that we can handle the rest of the message. Is
it true, because i have tested sending even 1MB long message by the
Internet connection and it was sent in one message - send() returned
length of whole message?
And the second question: If we really need to send the rest of the
message, what should i do if client disconnects while sending...
|
by: hazz |
last post by:
smtpClient.Send(message)
is causing me problems as per specifics in the trace below. Email is sent
but not without this error typically upon sending the second email, but
sometimes when running the app, even the first time. The application will
be required to be sending out repeated emails, about one every second or
two.
Must this be done asynchronously? Thank you. -Greg
I get the generic error messages;
|
by: cj |
last post by:
How can I get a button in VB to send the contents of a text box via
email in a manner similar to the "Send To\Mail Recipient" functionality
that you can select via right clicking a file in Windows Explorer?
I want the user to click a button and it lunch the users default email
client and put the contents of a multi line text box in the body of the
message and the contents of another text box in the title box and be
sitting there read for...
|
by: =?Utf-8?B?dHBhcmtzNjk=?= |
last post by:
I have a web page that at the click of a button must send a bunch (1000+)
emails. Each email is sent individually. I have the code working fine,
using Mail Message classes and smtp and all that. But sometimes even when
I'm just sending one e-mail the web page takes a minutes or so to post. Can
anyone tell me why it is so slow, or how to fix the problem?
To address this I am thinking of just creating a queue table to write the
emails...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
| |
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |