how to read in text box ?

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how can i read from barcode scanner in text box and add it in data base then when i read next time the previous reading is deleted and the new one appears in text box

Posted 11-Apr-11 1:41am

Mohammed Ahmed Gouda

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Michel [mjbohn] 15-Apr-11 3:01am

Could you please consider accepting one of the solutions if it was helpful for you?

3 solutions

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Abhinav S · Answer 1 · 2011-04-11T01:44:00

Solution 1

Check if if there is a barcode onRead or something similar.
If you have something like this, as soon as it fires, you can clear the textbox.

It could also be done in another way. Clear your textbox just before you place your barcode text into the box - but for that your code needs to be seen.

Posted 11-Apr-11 1:44am

Abhinav S

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Mohammed Ahmed Gouda 11-Apr-11 7:53am

sorry but can u help me with the code coz i am an amatuer with programming ?

Michel [mjbohn] · Answer 2 · 2011-04-11T01:55:00

Solution 2

you could try this

C#

private void textBox1_TextChanged(object sender, EventArgs e)
{
// your DB stuff here...
MessageBox.Show(string.Format("{0} entered in database", textBox1.Text));
this.ActiveControl = textBox1;
textBox1.SelectAll();
}

Posted 11-Apr-11 1:55am

Michel [mjbohn]

Updated 11-Apr-11 1:56am

v2

Comments

Mohammed Ahmed Gouda 11-Apr-11 8:19am

it work but it just take the first number from the barcode and add it to DB

Michel [mjbohn] 11-Apr-11 8:30am

oh yes that's right. I forgott that these scanners work like if you type on keyboard. So textBox1_TextChanged is trigered for every single char that comes in. Let me think about it again

Kim Togo 11-Apr-11 8:32am

But the complete barcode appearers in the TextBox ?
Try post how you insert the barcode in the database.

Michel [mjbohn] 11-Apr-11 8:45am

not the barcode itself will be in the textbox. Just the string (digits and chars) can be displayed in the textbox. That's all the scanner will send

Kim Togo 11-Apr-11 8:47am

Okay :-) - But the problem is that, OnReadBarcode event is called for every single digits and chars of the barcode ? - Is there a end marker (end of barcode) ?

Mohammed Ahmed Gouda 11-Apr-11 8:46am

i just click scanner button and the barcode appears in the text box

Michel [mjbohn] 11-Apr-11 8:46am

does the the scanner send an EOL (end of line) sign that could be filtered?

Mohammed Ahmed Gouda 11-Apr-11 8:48am

i want if i scanned more than one item with different barcode barcodes appears in textbox and dont want to add them together

Mohammed Ahmed Gouda 11-Apr-11 8:49am

it is like u r writing in text box each time u write a new letter u want the old one to be deleted but this time with barcodes . sorry i konw i am annoying

Michel [mjbohn] 11-Apr-11 8:58am

That's what I said. My solution does not work because the scanner send data like you were typing character after character and for each caharacter the 'textBox1_TextChanged' is triggerd. So we need gto know if there is an EOL marker send by the scanner and marker could be handled in 'textBox1_TextChanged'. After this marker is recognized the data will be writte to DB and textbox will be cleared for the next scan

Mohammed Ahmed Gouda 11-Apr-11 9:07am

no it doesnt send an EOL

BobJanova 11-Apr-11 9:37am

I think we need to see the documentation for the barcode scanner you are using.

Michel [mjbohn] 11-Apr-11 12:57pm

I agree with BobJanova. Maybe you could provide a link to some user manual of your scanner

Mohammed Ahmed Gouda 12-Apr-11 3:39am

sorry for the late this is the link http://www.motorola.com/Business/US-EN/Business+Product+and+Services/Bar+Code+Scanning/Bar+Code+Scanners/General+Purpose+Scanners/DS4208

Michel [mjbohn] 12-Apr-11 5:56am

OK, I will have a look at it later. I'm @work right now

Mohammed Ahmed Gouda 12-Apr-11 7:02am

i am sorry

Michel [mjbohn] 12-Apr-11 13:21pm

no prob :)
not at all

Mohammed Ahmed Gouda 12-Apr-11 5:46am

what about make a delay between each event ??

Michel [mjbohn] 12-Apr-11 13:21pm

I just wrote a new solution

Michel [mjbohn] · Answer 3 · 2011-04-12T07:20:00

I had a look at the user manual. The scanner is sending keystrokes. The keystroke it sends is the 'enter' key.
What I didn't find out is, whether this is default configuration or not. But it is quite easy to configure by scanning some barcodes from the manual.
Assumig that 'enter' key is configured as last sign, this might be your solution with using the KeyDown event of the textBox.

C#

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        // Your DB stuff
        // MessageBox.Show(textBox1.Text);
        this.ActiveControl = textBox1;
        textBox1.SelectAll();
    }
}

how to read in text box ?

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