Vb net validating controls
I am writing an application for my Notary business. I know I can use the Text Box Base class to cover the Text Box and also the Masked Text Box, but my validation code is not doing anything. I have an Error Provider on the form called Error Provider. So, I figured I would use the Validated and Validating events of the controls. This is my code: Private Sub Company_Validated(By Val sender As Object, By Val e As System.
Combo Box (that can be modified), Text Box and Masked Text Box. I need to make sure the "required" fields have a value when the Save button is clicked. If I leave the control empty, still nothing happens.
That may seem like Captain Obvious speaking, but you'll be amazed at some of the data that gets entered into a name field. I then created an If statement to determine how the input data was formatted and whether or not the data is only alphabetic. The client side validation is accomplished through the Client Validation Function property.The client side validation routine should be written in a scripting language, such as Java Script or VBScript, which the browser can understand.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.