Custom textbox validating user input in

Posted by / 02-Aug-2017 11:26

Custom textbox validating user input in

Important: Never attempt to set the Focus of a control in this event because it can cause the script to hang.

This event occurs when the control is finished validating.

Let’s update Example 1 to display an Error Message using an Error Provider Control: Next add a Validated event to clear in the Error Provider’s message.

Since our event will only clear the error message, it can be used as a generic event shared by all validating controls.

Use this event to handle any needed upkeep after successfully validating the control.

A typical case where Causes Validation property is set to False is when there is a cancel button.Since we are canceling, the focus will remain on the Text Box until the user enters the correct format. You can have a label to display the error message or change the foreground color of the Text Box or use a Tool Tip control to display a popup message.A good solution is to use the Error Provider control.I am teaching British Sign Language on my website, on the alphabet section I have an image of 'signs' that spell out a word.Below I would like a text box that requires the user to input the correct word and for the text box to validate live and appear with a tick next to it.

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There is no need to validate a control that loses focus when the user wishes to cancel out of the form; therefore, the button’s Causes Validation property can be set to false.

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