C combobox validating my lovers dating ru site

Rated 3.90/5 based on 636 customer reviews

Well, sometimes a good structured and thought out If statement can suffice, but it can become quite long and cumbersome in the future. By using Regular Expressions this way, you can reduce the chances of getting errors at erratic times. This sub checks the email's format and if it thinks that it matches, it returns True and vice versa.

Also, the more tests you are performing, the slower your app might become. For more information regarding Regular Expressions, you are welcome to look at these two MSDN articles: Because it is always easy to learn by doing things practically, you will be creating an app that makes use of Regular Expressions to determine valid input. NET application and design the form to resemble Figure 1. Obviously this only works for the formatting of the email.

Hello: Using Win Forms, certain users may change the value in a combobox, others may not. I need to check the user's rights before committing his or her changes in the box and restore the previous value if he or she is not allowed (or not let the value be changed in the first place). Ken Using Win Forms, certain users may change the value in a combobox,others may not. I need to check the user's rights before committing his or herchanges in the box and restore the previous value if he or she is notallowed (or not let the value be changed in the first place). Now the only thing I need to be able to do is reset the original value and allow the user to continue.

I can get the permissions and check them OK, but I don't know how to manage the combobox. Selected Index Changed isn't much help because it fires off when the form opens because the value is being set programatically. I can get the permissions and check them OK, but I don't know how tomanage the combobox. Selected Index Changed isn't much help because it fires off when theform opens because the value is being set programatically.

It's difficult to tell what is being asked here.

For more information, see the WM_KILLFOCUS topic in the "Keyboard Input Reference" section, and the "Message Deadlocks" section of the "About Messages and Message Queues" topic in the MSDN library at

The following code example uses the derived class Text Box and validates an e-mail address that the user enters.

So this is just an example which gives you some advices on how to develop it.

First you're using string values and are basing logic on these values, you might want to look into using an Enum and binding all it's values to the combo box.

Leave a Reply