Validating user input visual basic love without dating


08-Jan-2017 15:26

You have to write the code in the Validate event procedure of the control where you input the data, for example, on the Text Box control.

After that, you move to another control, for example, to a Command Button, a Text Box or any other.

An application also usually validates field-level data when the user finishes entry in each field and attempts to leave the field by setting focus away from it.

We also discuss the Validate event and Causes Validation property (new to VB6) that you can employ in this type of validation.

A is a string made up of characters from a masking language that specifies which characters can be entered at any given position in the text box. If the user types an incorrect entry, for example, the user types a letter when a digit is required, the control will automatically reject the input.

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In the toolbox panel, drag three Text Box items inside the div tags followed by two break lines. In the toolbox panel, drag a Button item below the last set of break tags. In the toolbox, look in the validation section and drag a Required Field Validator after each text box. Click on Required Field Validator1 and in the properties window look for ‘Control To Validate’. Repeat for Required Field Validator2 (enter Text Box2) and Required Field Validator3 (enter Text Box3). For all Required Fieldvalidators, change the Error Message to ‘*‘ (an asterisk) and change the Fore Color to Red. In the toolbox panel, drag a Label item after the closing button tag and delete it’s text. Basically we are just adding the text value from each text box to the label. That means the first control where you entered the data lost the input focus, and the other control is about to receive the focus.



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