Solved

Force focus in a windows form

Posted on 2011-02-18
5
561 Views
Last Modified: 2012-05-11
There are a windows form with some controls: datagridview, textboxes, labels, buttons. Operator use a scanner configurated in keyword emulator to read barcodes. If the focus of the cursor is not in the right place (dedicated textbox) the content is not processed and in some cases can cause errors. Fortunately barcode starts with a particular character ("*") so I've think to intercept * and force focus to the textbox but I don't know witch event can help me.
0
Comment
Question by:fantamen
  • 2
  • 2
5 Comments
 
LVL 10

Expert Comment

by:kdwood
ID: 34926057
fantamen,

Can you be more specific as to how your windows Form is called and how your application is designed.  It seems to me that you would force the focus to the proper input field prior to the scanning, as a part of the application design.  Instead, it seems as though you wish to force focus as a result of a barcode being scanned.

A step by step explanation of your process would help to understand your problem.

Regards,

Keith
0
 
LVL 70

Accepted Solution

by:
Éric Moreau earned 250 total points
ID: 34926288
the form has a KeyPreview property. set it to true.

now handle the KeyPress event of the form. If you find your *, do a YourTextBoxControlName.Focus
0
 

Author Comment

by:fantamen
ID: 34926344
For example a barcode can be this: *045 02341
Keyboard emulator scanner read this code. If the active control of the form is txtBarCode all is ok. If operator has put the focus to a cell in a datagridview in the form and then read the barcode naturally *045 02341 is written in the cell and this is the problem. If I can intercept the first character of the barcode (*) and in presence of * force the focus to txtBarCode i will solve my problem.


0
 
LVL 10

Expert Comment

by:kdwood
ID: 34926381

So it seems that your form is not just used for scanning input, but has other interactive purposes.  In that case, I believe emoreau's solution should work.

Regards,

Keith
0
 

Author Comment

by:fantamen
ID: 34926904
Dear Emoreau and kdwood your suggestion solve my problem. Very good!
I've add two lines in then Form_KeyPress event, after txtBarCode.Focus, one to add at the beginning of the code the * and another to set the selection start to the second position in the text box.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create and use a custom WaterMark textbox class.  The custom WaterMark textbox class allows you to set the WaterMark Background Color and WaterMark text at design time.   IMAGE OF WATERMARKS STEPS Create VB …
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question