skip to content »

centr-geoteh.ru

Vb net combobox validating event

vb net combobox validating event-1

For example, consider the following VB6 code: Private Sub Text1_Got Focus() Text1.Back Color = vb Yellow End Sub Private Sub Text1_Lost Focus() Text1.

vb net combobox validating event-41vb net combobox validating event-55vb net combobox validating event-46vb net combobox validating event-46

Data input validation in Windows Forms is essential.What this component can do is display a little red icon beside any control which is invalid. Now, in the Validating event of the textbox you need to put the code to test the contents for validity and optionally display the error icon.When the user hovers their mouse over this icon a tooltip is instantly displayed with information about the invalid field. While this may sound trivial, it's actually rather useful. It's up to you how you do your validation, it could be as simple as text length constraints or as advanced as regular expressions matching.You can have as many error providers on a form as you wish, but I can only see a potential use for two.Super Validator can work with any of these components set or without any of them at all if you are planning to report validation results some other way.This little Gem is often left unnoticed, which is a funny thing considering it sits in the Windows Forms Controls Toolbox by default.

It is a component rather than a control, so when you put it on your form it will sit in the component tray below.

Next step is to choose the way Super Validator performs validation.

That is done by setting Validation Type property as shown in image below: These properties allow you to define 3 level validation for each control.

Validation starts with Validator1, Validator2 and finally Validator3.

You can assign one of these properties or all of them if you need to perform multi-level validation.

I know the process is written in the Sub Change() location but I am stuck on how to relate them to each other.