Hello everybody!

I'm actually developing a small application which reads the isbn from a barcode scanner and then it finds out all other data for the book which has that ISBN.

I've recently got a bar code scanner which gets the data as if I am typing on the keyboard. For example if I set the focus on a textbox and then I scann an ISBN image then the ISBN is written on the texbox one character at a time.

Everything is Ok at this point. The problem is:

I want to know when the device has finished reading the ISBN so that I can proceed doing other operations that I need. I've set the TextBox1_TextChanged event but it triggers every time the device reads a character(similar to the keyboard) and I can't recognize if the text in the textbox is the entire ISBN or just a part of it.

Has anyone else faced this before?
Maybe I should use timers?

Thank you

Take a look at your scanner's documentation. Surely you'll find a barcode that you can scan to configure the scanner to send you a CR/LF (or some other character) at the end of scan or to wrap the scanned text between <STX><ETX>. Then you can look for the presence of that char to trigger your processing.

well of course it will trigger it. Why do you need to place your code in that event? why not implement a keypress event or a button to perform the code you want to after reading the ISBN?

Take a look at your scanner's documentation. Surely you'll find a barcode that you can scan to configure the scanner to send you a CR/LF (or some other character) at the end of scan or to wrap the scanned text between <STX><ETX>. Then you can look for the presence of that char to trigger your processing.