When all fields have text and the button is clicked then the label we assigned the text values to will appear next to the button.
Introduction This article describes a simple approach to validating dates received as strings (e.g., 2/21/2008).
But in the real world, you need to handle unexpected problems when your code is running.
Then, we'll demonstrate how you can use validation techniques to prevent bad data from being entered into your application in the first place. In the solution explorer panel, right click the project solution and click Add New Item. Make sure Visual Basic is the installed template and select Web Form. 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. Regular expressions are a good way to validate text fields such as date,names, addresses, phone numbers, and other user information. Regex class for validate any input string for any specific format.