CODEWITHSUNDEEP
winforms
Almo
Almo

Reputation: 15861

Why does TextBox Leave fire when mouse leaves?

I thought that Leave was supposed to fire when a control loses focus, and MouseLeave was supposed to fire when the mouse is no longer in the control.

I have a TextBox, and if I click in it, then take the mouse out, the Leave event fires. I'm using Leave to validate the entry in the box, like when people hit tab to go to the next control.

Does this mean that a TextBox can't have focus unless the mouse remains in it?

Upvotes: 1

Views: 1081

Answers (3)

João Angelo
João Angelo

Reputation: 57658

You should not be using Leave or LostFocus for validation purposes, instead use TextBox.Validating which is designed specifically for validation scenarios.

This way, if you want to have a Cancel button for example, you can just set its CausesValidation property to false and editor controls Validating events will not fire.

Upvotes: 3

stuartd
stuartd

Reputation: 73243

You must have some other code setting focus, because Leave does not fire when the mouse moves out of the control.

Upvotes: 3

fran_jo
fran_jo

Reputation: 3

It doesn't matter if the mouse is in it. Property Focus refers to another type of event, when a component is ready to have its value changed, It doesn't matter if you use the keyboard or the mouse. Why don't you validate TextBox value when the Textbox looses Focus?

Upvotes: 0

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