Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: Visual FoxPro
Expertise: Beginner
Jun 1, 2000



Application Security Testing: An Integral Part of DevOps

Object Focus

How do I make a control keep the focus until a value within a specified range is entered?

The control in question is a text box.

The simplest way to trap this would be to use the Valid method of the textbox. The Valid method fires when you attempt to leave a control. If the code in the Valid method returns .T., then you are allowed to leave the control. Otherwise, you remain in the control. For example, to enforce a range of 2 through 5 inclusive, you could put the following code into the Valid method of the textbox:

RETURN BETWEEN(this.Value,2,5)
Another approach would be to use the RangeHigh and RangeLow methods. These are a little confusing at first. The concept is that you RETURN the value that is the limit (the lower limit in RangeLow and the upper limit in RangeHigh). For example, to create the same effect as the code above, you could put the following code into the RangeLow method:
and the following code into the RangeHigh method:
DevX Pro
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date