Comments by GrooverFromHolland (Top 15 by date)

Hi Wes,
You gave me the idea, the last characters of my string are always numbers with a maximum of 255.
I can filter on that.

Hi all,

Found a serious bug in my code!
If a invalid packet is received the program hangs in the data received event.
I forgot to check invalid packet.
I will update my code,

GrooverFromHolland

I have implemented my idea (reading byte by byte and when in sync read one packed of 19 bytes at once)in my project and tested it.
After opening serialport the first packet is incomplete the second is valid(reading byte by byte) and the rest reading full packet at once are all valid and processed in time.
running for 15 minutes at 6.3 packets of 19 bytes per second: no packets lost, all valid.

GrooverFromHolland

PS

I will submit my serial event code with comment after more testing at higher speed.

Hi Sergey,

Thank You for answering,

I started with SerialPort.Read(byte[]and store the result in a buffer but than it is difficult to stay synchronized with the start and end byte and stay in sync, as the stream comes continuously to the port, even before my application has started.

Maybe I can start with reading byte by byte until a full and valid packet has arrived and then start reading 19 bytes at once and continue reading bytes[] until a packet is not valid or incomplete and start over again reading byte by byte until in sync again.
occasionally loosing a packet is not a problem.
what do You think of this approach?

Anny one can comment on this,

GrooverFromHolland

a +5 and solution accepted!
I'll post what I made of it and if You want please comment.

Thanks,

Groover.

Thank You Sergey,
I started with this for testing and it works, but for the real thing I am not using textboxes but values come from a database.
I will try with motor aray and valuearray.

It is no option to redesign my application (4000+ lines of code in this form only).
this is what my application is supposed to do:
The user fills in up to 50 controls every value is stored in a database table when finished.
if the user wants to modify a previous assignment the user clicks a button named modify assignment and a datagridview is filled with all previous assignments.
the user clicks in the datagridview to select the assignment to modify.
In this click event all relevant controls get a value from the database.
So far there is no problem!
Now I want to process all controls as if the user would do when the form is first filled.
It is designed that if the first control is handled the next relevant control is automatically focused and so on.

I know this is a terrible idea. But i do not know of another way to alter previous entered data in a form
and process the input in the same sequence.

It is the same form, it is processing the value in the control
and selecting the next control.

You are almost there.
MyImage = Image.FromFile(openFileDialog1.FileName);
panel1.BackgroundImage = MyImage;